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Every number we use, and its source

Updated Nov 5, 2026 · By GSM Solar

Every number on this site comes from this list. Each one shows where it came from, the exact section we read, and the day we read it. Tap a value to see its card. Download as JSON or CSV.

What Illinois homes pay for power 2016 to 2026

¢ per kWh, statewide. Latest: 19.32¢, Aug 2026
Source: U.S. EIA, Form EIA-861M, monthly sales and revenue. Checked Nov 4, 2026.Note: All-in statewide average for Illinois: supply plus delivery, fixed charges spread over every kWh. Recent months are preliminary.

Net metering

Checked Nov 3, 2026 to Nov 5, 2026

WhatValueSource
What net metering is, in Illinois Shines wordsa credit on your bill for the power your panels send to the gridIllinois Shines [1]Question 1, What is net metering?
Net metering for systems that start on or after January 1, 2025credit for supply charges only, for systems that start on or after January 1, 2025Illinois Shines [1]Question 3, When will net metering changes take place?
Delivery charges under supply-only net meteringdelivery charges on all the power you pull from the gridIllinois Shines [1]Question 2, What changes are coming to net metering in Illinois?
Illinois Shines worked example: net usage100 kWhIllinois Shines [1]Question 2, worked example
Illinois Shines worked example: delivery charges500 kWhIllinois Shines [1]Question 2, worked example
Charges that stay on the bill whatever you usecustomer charges and fees that do not depend on how much power you useIllinois Shines [1]Question 2, last sentence of the answer
Credit for systems that start net metering in 2025 or latera lower credit per kWh than systems already on net meteringIllinois Shines [1]Question 7, What is the difference between the full retail net metering rate and the new net metering rate?
Systems already on full retail net metering before 2025full retail net metering for the life of the systemIllinois Shines [1]Question 2, last paragraph
When net metering credits show up on the billgenerally within 1 to 2 monthsIllinois Shines [2]Step 5, Installation of Your Solar Project
Net metering credits, in the Illinois Power Agency fact sheeta credit that appears on your electric billIllinois Power Agency [3]Opening list: three types of credits
How co-ops and city utilities handle net meteringmay limit net metering, or credit the power you send out in a different wayIllinois Shines [1]Question 1
How the utility nets power in and outthe power you send out is netted against the power you pull inIllinois Shines [1]Question 2
Full retail net metering when the owner changesfull retail net metering stays with the system when the owner changesIllinois Shines [1]Question 5
Size change that ends full retail net metering100%Illinois Shines [1]Question 6
If you cannot tell which net metering a system hascheck with your utilityIllinois Shines [1]Question 4
The two forms of supply-only creditkWh credits against supply charges, or money credits figured from supply chargesIllinois Shines [10]Net Metering, first question
Solar output in winterpower in winter too, but it can be a lot less, because of shorter days, a lower sun and snow on the panelsIllinois Shines [10]Net Metering: Does my system produce electricity in winter months?
Credits from extra power in summercredits for extra summer power that can roll over to later monthsIllinois Shines [10]Net Metering: Does my system produce electricity in winter months?
What the Disclosure Form says about creditinghow your utility or co-op will credit the power your system sends backIllinois Shines [10]Net Metering, second question (co-ops and municipal utilities)
Supply-only credits month to monthcarry over to the next month, and unlike full retail credits, do not expire at the end of the annual periodIllinois Power Agency [52]Slide 31, Net Metering Changes: customer impact
Where supply-only credits show on the billonly the extra power sent to the grid, tracked in the supply section of the billIllinois Power Agency [52]Slide 31, Net Metering Changes: customer impact
Power used as the panels make itpower your home uses as the panels make it never passes the utility meter, so it does not show on the billIllinois Power Agency [52]Slide 31, Net Metering Changes: energy generated and used onsite
What a battery does under supply-only net meteringa battery can cut how much power goes out at the supply-only credit, and give backup powerIllinois Power Agency [52]Slide 32, Net Metering Changes: energy storage
Legacy net metering when a new customer takes overa later customer at the home inherits itIllinois Power Agency [52]Slide 30, Net Metering Changes: eligibility for legacy net metering
When a solar home pulls power from the gridpower from the grid any time your home uses more than the panels are makingIllinois Shines [10]Net Metering, first question

Power prices in Illinois

Checked Nov 4, 2026

WhatValueSource
Average price Illinois homes paid for electricity, August 202619.32¢U.S. EIA [9]Table 5.6.A, Illinois row, Residential, August 2026 (released Oct 23, 2026)

The federal tax credit

Checked Nov 3, 2026 to Nov 4, 2026

WhatValueSource
The federal credit on a lease or PPAthe system owner can use it and pass it on through the PPAIllinois Power Agency [3]Federal Tax Credits column
Residential Clean Energy Credit end datenot available for property placed in service after December 31, 2025IRS [8]How it works
Residential Clean Energy Credit, while it lasted30%IRS [8]How it works
Rule for marketing that mentions the federal tax creditany mention of the federal tax credit must be accurate and currentIllinois Power Agency [4]Section I.C.1, General Requirements (page 11)
When a Residential Clean Energy Credit cost counts as madecounted when the installation is completed, not when you payIRS [15]Question 7
A system finished after the end dateno 25D credit if installation is completed after December 31, 2025IRS [15]Question 7
Why the Residential Clean Energy Credit ended when it didended early by a federal law dated July 4, 2025IRS [15]Title and Question 1
Which tax year the credit belonged toclaimed for the tax year the system is installed, not the year it is boughtIRS [8]How to claim the credit
What the Residential Clean Energy Credit coveredsolar electric panels and, from 2023, battery storageIRS [8]Qualified expenses

Leases and power purchase agreements

Checked Nov 3, 2026 to Nov 4, 2026

WhatValueSource
Who owns a leased or PPA systemowned by the solar company, not the homeownerU.S. Department of Energy [6]How do I pay for solar? (leases and PPAs)
How a PPA prices powera set price per kWh for the power the system makesU.S. Department of Energy [6]How do I pay for solar? (leases and PPAs)
Tax benefits on a lease or PPAno tax benefits for the homeowner, who does not own the systemU.S. Department of Energy [6]How do I pay for solar? (leases and PPAs)
PPA contract must say: buying the systemwhether you can buy the system, and on what termsIllinois Shines [7]Section 3, Contract Requirements specific to PPA Transactions
PPA contract must say: UCC-1 filingthe owner's right to file a UCC-1 statementIllinois Shines [7]Section 3, Contract Requirements specific to PPA Transactions
PPA contract must say: selling the homewhat happens to the PPA if you sell the homeIllinois Shines [7]Section 3, Contract Requirements specific to PPA Transactions
PPA contract must say: price and increasesthe price, and any yearly increaseIllinois Shines [7]Section 3, Contract Requirements specific to PPA Transactions
PPA contract must say: early terminationany early termination feeIllinois Shines [7]Section 3, Contract Requirements specific to PPA Transactions
What the seller must explain about the agreementthe type of agreement and how long it lastsIllinois Power Agency [4]Section I.A, General Requirements (page 9)
The most common ways to go solar on a homebuying the system, leasing it, or signing a PPAIllinois Shines [10]Distributed Generation FAQs: ownership options when installing solar
How a lease prices the systema set amount each month, based on how much power the system is expected to makeU.S. Department of Energy [6]How do I pay for solar? (leases and PPAs)
Questions to ask before you sign a PPAthe price per kWh, and whether an escalation clause raises what you pay over time, and by how muchIllinois Shines [10]Distributed Generation FAQs: ownership options when installing solar
Rule for increases stated in marketingany increase shown in marketing must match the Disclosure Form and your contractIllinois Power Agency [4]Section I.C.1, General Requirements (page 10)
Who bills you for a lease or PPAyour solar provider, not your utility billIllinois Shines [10]Distributed Generation FAQs: how billing works for an ongoing lease or PPA
A lease or PPA when you moveyou may have to buy out the contract if you moveIllinois Shines [10]Distributed Generation FAQs: what to consider about moving
Purchase contract must say: when you own the systemwhen the system becomes yoursIllinois Shines [7]Section 2, Contract Requirements specific to Purchase Transactions
PPA contract must say: removal when it endswhether the system comes off your roof when the contract ends, and any removal feeIllinois Shines [7]Section 3, Contract Requirements specific to PPA Transactions
PPA contract must say: renewalwhether the PPA renews when its term ends, and on what termsIllinois Shines [7]Section 3, Contract Requirements specific to PPA Transactions
PPA contract must say: insurance and damagewho insures the system, and who carries the loss if it is damagedIllinois Shines [7]Section 3, Contract Requirements specific to PPA Transactions

Selling a home with solar

Checked Nov 4, 2026

WhatValueSource
Selling a home with a lease or PPA: the two pathsbuy the system out, or transfer the PPA to the buyerIllinois Shines [20]Understanding Solar Panel Ownership Models: Lease and Power Purchase Agreement (PPA)
After a buyoutonce you own the system, you can sell it with the homeIllinois Shines [20]Understanding Solar Panel Ownership Models: Lease and Power Purchase Agreement (PPA)
Where to find the buyout pricethe buy-out price, or a formula for it, in your contractIllinois Shines [20]Understanding Solar Panel Ownership Models: Lease and Power Purchase Agreement (PPA)
Limits on a buyoutany limits on buying the system outIllinois Shines [20]Understanding Solar Panel Ownership Models: Lease and Power Purchase Agreement (PPA)
The transfer agreementa transfer agreement from the Approved Vendor, signed by you and the buyerIllinois Shines [20]Understanding Solar Panel Ownership Models: Lease and Power Purchase Agreement (PPA)
A clause in the home sale contracta clause in the home sale contract that requires the buyer to sign the transfer agreementIllinois Shines [20]Understanding Solar Panel Ownership Models: Lease and Power Purchase Agreement (PPA)
Buyer approval for a PPA transferthe system owner may require the buyer to qualify, often by checking credit or incomeIllinois Shines [20]Understanding Solar Panel Ownership Models: Buyer Qualification
Insurance terms for the buyerthe buyer may need to meet the insurance terms in the PPAIllinois Shines [20]Understanding Solar Panel Ownership Models: Buyer Qualification
Telling the Approved Vendor you are sellingthe Approved Vendor may require the new owner to sign an agreement so the system can stay in Illinois ShinesIllinois Shines [20]Steps in the Project Transfer Process, step 2
Monitoring access for the new ownerthe new owner may need to give the Approved Vendor access to the system's monitoringIllinois Shines [20]Steps in the Project Transfer Process, step 2
Contract terms that can apply to a salenotice before you sell, limits on ending early, or that you stay responsible until the buyer takes overIllinois Shines [20]Required Disclosures and Documentation
If the buyer will not take over the PPAyou may need to buy the system out or pay to have it removedIllinois Shines [20]What Happens if the Buyer Declines Assumption of a Lease or PPA?
Where the Disclosure Form covers ending earlythe Early Termination or Completion of Contract section of your Disclosure FormIllinois Shines [20]What Happens if the Buyer Declines Assumption of a Lease or PPA?
What a UCC-1 isa notice with the county that shows the company owns the solar systemIllinois Shines [20]Understanding Solar Panel Ownership Models: Lease and Power Purchase Agreement (PPA)
A UCC-1 after the transferthe UCC-1 may be filed again after the transferIllinois Shines [20]Understanding Solar Panel Ownership Models: Lease and Power Purchase Agreement (PPA)
What a UCC-1 coversan interest in the solar equipment, not the homeIllinois Shines [20]Steps in the Project Transfer Process, step 6
A UCC-1 at closingmost title companies want it resolved before they issue a clean policyIllinois Shines [20]Footnote 2, on UCC-1 statements
Time for the buyer's lenderreviewed or cleared before closing, and starting early gives the buyer's lender time to approve itIllinois Shines [20]Steps in the Project Transfer Process, step 6
Finding who owns the systemthe Disclosure Form names the Project Owner on a PPAIllinois Shines [20]Understanding Solar Panel Ownership Models: Lease and Power Purchase Agreement (PPA)
Solar at a home saleusually stays with the home and passes to the new ownerIllinois Shines [20]Understanding Solar Panel Ownership Models
How to show you own the systemlisted as Project Owner on the Disclosure Form, the contract and the interconnection approval letterIllinois Shines [20]Understanding Solar Panel Ownership Models: Purchase, How to Verify Ownership
Owned systems compared with a lease or PPA at salean owned system tends to transfer more simply, and a lease or PPA takes more work from the sellerIllinois Shines [20]How the Ownership Model Affects Marketability
A UCC-1 on a system you boughtif you still owe on a system you bought, the company you owe may have filed a UCC-1 that must be cleared before the saleIllinois Shines [20]Understanding Solar Panel Ownership Models: Purchase
Papers to gather for the buyercontracts, warranty papers, maintenance records, system diagrams and permits, and the interconnection agreementIllinois Shines [20]Legal and Administrative Logistics: Documentation to Gather
Warranties at a home saleoften transfer on their own, but you usually need the papersIllinois Shines [20]Legal and Administrative Logistics: Documentation to Gather
If the Approved Vendor does not answerthe Illinois Power Agency's consumer protection team can helpIllinois Shines [20]Key Takeaways
Disclosure Form, If You Move boxwhether you can transfer the PPA to the new owner, and what that takesIllinois Shines [21]If You Move
Disclosure Form question on the UCC-1whether the system owner will file a UCC-1Illinois Shines [21]Project Installation
Purchase contract must say: selling the homeyour rights and duties when you sell the homeIllinois Shines [7]Section 2, Contract Requirements specific to Purchase Transactions
PPA contract must say: removing the systemwhether the system is removed when the contract ends, and any removal feeIllinois Shines [7]Section 3, Contract Requirements specific to PPA Transactions
Full retail net metering when ownership changesa system on full retail net metering before January 1, 2025 keeps it even if ownership changesIllinois Shines [1]Question 5
Leased or PPA systems at a home saleadd some complexity to the real estate transactionU.S. Department of Energy [6]Real Estate: How will solar impact the resale value of my home?
The county notice and the buyer's mortgagethe system owner may need to lift that notice for the buyer's mortgage to be approvedIllinois Shines [20]Understanding Solar Panel Ownership Models: Lease and Power Purchase Agreement (PPA)

Batteries and power outages

Checked Nov 4, 2026

WhatValueSource
Grid-tied home solar when grid power cuts outdesigned to switch off when grid power cuts out, for safetyU.S. Department of Energy [16]How Does Resilience Fit into the Solar Energy Landscape?
What solar panels need to make power on their owna properly configured inverter and a storage systemU.S. Department of Energy [16]How Does Resilience Fit into the Solar Energy Landscape?
What solar with a battery does when grid power is lostdetects the loss of grid power and switches to islanded mode to keep the power onU.S. Department of Energy [16]What is Electric Power Resilience?
Solar with storage in a long outagecan keep delivering power in a long outage, even at nightU.S. Department of Energy [16]How Does Solar Improve Resilience?
When grid power comes backbackup systems reconnect to the grid when service is restoredU.S. Department of Energy [16]What is Electric Power Resilience?
Why many solar systems disconnect when the grid goes downpower from an islanded system could injure workers who think the lines are disconnected from powerU.S. Department of Energy [17]Islands and Microgrids
What a solar inverter doesturns the DC power panels make into the AC power the grid usesU.S. Department of Energy [18]What are Inverters?
What lets solar and a battery run without the gridadvanced inverters, if the system is designed to do soU.S. Department of Energy [18]What are Inverters?
A battery's energy capacitythe total amount of energy it can store, usually in kilowatt-hoursU.S. Department of Energy [19]What Is Energy Storage?
A battery's power capacitythe amount of energy it can release at a given time, usually in kilowattsU.S. Department of Energy [19]What Is Energy Storage?
Energy lost when power is stored100%U.S. Department of Energy [19]What Is Energy Storage?
What stored solar power is for, in the DOE homeowner guideuse it later, like at night, or even when the power goes outU.S. Department of Energy [6]I have heard a lot about solar plus storage. What is it and do I need it?
The DOE homeowner guide on battery storageask your solar installer if they offer battery storage optionsU.S. Department of Energy [6]I have heard a lot about solar plus storage. What is it and do I need it?
How a home solar inverter handles trouble on the gridrides through small disruptions, and shuts down if one lasts a long time or is larger than normalU.S. Department of Energy [18]Grid Services and Inverters
What a traditional grid-following inverter needsneeds an outside signal from the grid to workU.S. Department of Energy [18]Grid Services and Inverters

Is a home a fit

Checked Nov 4, 2026

WhatValueSource
Why a roof may not suit solarsome roofs may not suit solar because of their age or tree coverU.S. Department of Energy [6]Is my home suitable for solar panels?
Roof age before solarthink about the age of your roof and how long until it needs replacingU.S. Department of Energy [6]Is my home suitable for solar panels?
Tree shade on the roofheavy shade from nearby trees can make rooftop panels a poor choiceU.S. Department of Energy [6]Is my home suitable for solar panels?
Which roofs suit panels bestbest on south-facing roofs with a slope between 15 and 40 degrees, though other roofs may work tooU.S. Department of Energy [6]Is my home suitable for solar panels?
Roof size, shape and slopethe size, shape and slope of your roof also matterU.S. Department of Energy [6]Is my home suitable for solar panels?
If you rent, or the roof does not suit solarcommunity solar, one shared solar array that many people can sign up forU.S. Department of Energy [6]Is my home suitable for solar panels?
What PVWatts doesestimates how much power a solar system makes at any addressU.S. Department of Energy [6]How much power can I generate with solar?
An estimate for your own roofa custom estimate for your own system, from a solar installerU.S. Department of Energy [6]How much power can I generate with solar?
Roof condition rule for roof-mounted projectsthe roof must be in good enough condition for a solar projectIllinois Power Agency [4]Section I.A, General Requirements (page 9)
Design comes before the contract stepsthe system is designed around the roof's direction and shade before the contract steps beginIllinois Power Agency [4]Section V.A, Standard Disclosure Forms and Requirements for Contract Execution, General Requirements
Net metering at co-ops and city utilitiesco-ops and city utilities may limit net metering or credit power a different wayIllinois Shines [1]Question 1, What is net metering?
Power one kW of panels makes in a year near Edwardsville, Illinois1,395 kWh/kW/yrNational Laboratory of the Rockies [22]PVWatts v8 API: lat 38.81, lon -89.95, 1 kW, roof mount, south-facing (180°), 25° tilt, 14% losses, NSRDB PSM V3 GOES TMY weather
Power one kW of panels makes in a year near Marion, Illinois1,407 kWh/kW/yrNational Laboratory of the Rockies [22]PVWatts v8 API: lat 37.73, lon -88.93, 1 kW, roof mount, south-facing (180°), 25° tilt, 14% losses, NSRDB PSM V3 GOES TMY weather

Illinois Shines and solar credits

Checked Nov 3, 2026 to Nov 4, 2026

WhatValueSource
What Illinois Shines ispayments for the solar credits a system makes over 15 or 20 years, depending on system typeIllinois Power Agency [4]Section I.A, common questions: What is Illinois Shines? (page 8)
What a REC isthe environmental value of solar power, not the power itselfIllinois Power Agency [4]Section I.A, common questions: What are RECs and why are they valuable? (page 8)
Who runs Illinois Shines day to dayadministered by Energy Solutions for the Illinois Power AgencyIllinois Shines [2]Page footer
Who sells the creditsyour Approved Vendor sells the credits to the utilityIllinois Shines [2]Step 4, REC Contract Execution
How the utility pays for the credits on small systems50%Illinois Shines [2]Step 7, Contracting Utility Pays Approved Vendor for RECs
Where the credit money goespassed to you, or built into a lower project cost, depending on your contractIllinois Shines [2]Step 7, Contracting Utility Pays Approved Vendor for RECs
When the Illinois Shines application can startnothing is filed until you sign the Disclosure FormIllinois Shines [2]Step 1, Review & Sign Disclosure Form and Customer Contract
Who holds the credit contractsthe credit contracts run through Approved Vendors, not each homeownerIllinois Power Agency [3]Renewable Energy Credits (RECs) column
The Adjustable Block Programthe legislative name for Illinois ShinesIllinois Power Agency [4]Section I.A, common questions: What is the Adjustable Block Program? (page 8)
When a REC is madeone REC for each megawatt-hour of power made from a renewable source and delivered to the gridIllinois Power Agency [3]Renewable Energy Credits (RECs) column
Why utilities buy the creditsutilities must buy RECs to supply a set amount of power from renewable energyIllinois Power Agency [4]Section I.A, common questions: What are RECs and why are they valuable? (page 8)
Who can make claims about the powerwhoever owns the RECs has the right to make claims about the use of that solar powerIllinois Power Agency [4]Section I.A, common questions: What are RECs and why are they valuable? (page 8)
The seller must say it will sell the creditsthe seller must tell you it plans to sell your project's RECs through the programIllinois Power Agency [4]Section I.B, Statements about RECs (page 10)
What a home that sells its credits says about its powerthe RECs go to a utility or the IPA, so the home should not claim to use clean or renewable powerIllinois Power Agency [4]Section I.B, Statements about RECs (page 10)
What may be said about a project's poweryour solar project will create energy from the sun and add to new solar powerIllinois Power Agency [4]Section I.B, Statements about RECs (page 10)
What an Approved Vendor isa company the Program Administrator approves to file project applications and hold the REC contractsIllinois Power Agency [4]Referenced Terms and Documents: Approved Vendor (page 3)
What a Designee isa company that works with customers for an Approved Vendor, such as an installer or a sales firm; each must register, and the program publishes the listIllinois Power Agency [4]Referenced Terms and Documents: Designee (page 4)
Who files the applicationyour Approved Vendor files the application, in a batch with other projectsIllinois Shines [2]Step 2, "Part I" Application Submission & Review
Who approves the credit contractsthe Illinois Commerce Commission approves the REC contracts between your Approved Vendor and the utilityIllinois Shines [2]Step 3, Commission Review
Which credits the payment covers on small systems15 yearsIllinois Shines [2]Step 7, Contracting Utility Pays Approved Vendor for RECs
Checking where your application standsan application lookup tool at illinoisshines.com/project-statusIllinois Shines [2]Closing page
How the credit value can reach a PPA customerpassed through indirectly, such as in lower PPA or lease paymentsIllinois Power Agency [4]Section VI.A.2, DG Projects Where a REC Incentive Payment Is Passed Through to the Customer (pages 34-35)
When the contract promises you part of the paymentthe Approved Vendor must pay you on time, as your contract and its own statements sayIllinois Power Agency [4]Section VI.A.2, DG Projects Where a REC Incentive Payment Is Passed Through to the Customer (pages 34-35)
What a seller in person must tell youa seller in person must name their company and, if it is a Designee, its Approved VendorIllinois Power Agency [4]Section III.A, Requirements that Apply to All In-Person Marketing (page 21)

Counties: power companies, permits and sun

Checked Nov 4, 2026

WhatValueSource
Power one kW of panels makes in a year near Edwardsville, Illinois1,395 kWh/kW/yrNational Laboratory of the Rockies [22]PVWatts v8 API: lat 38.81, lon -89.95, 1 kW, roof mount, south-facing (180°), 25° tilt, 14% losses, NSRDB PSM V3 GOES tmy-2020 3.2.0 weather
Southwestern Electric Cooperative serves parts of Madison Countyparts of Madison CountySouthwestern Electric Cooperative [25]About Us
MJM Electric Cooperative serves Madison County among its countiespower lines in Madison County, among the counties it servesMJM Electric Cooperative [26]Home page, about the cooperative
Clinton County Electric Cooperative serves parts of Madison Countyparts of Madison CountyClinton County Electric Cooperative [27]Home page, about the cooperative
Who handles building permits in unincorporated Madison Countythe county Building & Zoning Department runs the building code for unincorporated areas, and a contractor applies for the permit before work startsMadison County [28]Building Permits & Inspections
Madison County solar permit applicationsseparate permit applications for roof mount solar and ground mount solar, which can be filled out and sent onlineMadison County [29]Online Permit Applications, Building Permit Applications
When work may start under a Madison County permitonce the Building Inspector approves the application and you receive your Madison County building permitMadison County [30]Building & Zoning FAQ, When may I begin work on my project?
Edwardsville solar permit rulea building permit for every home solar installation, before any work beginsCity of Edwardsville [31]Solar Panel Permit Requirements, opening paragraph
Edwardsville roof strength rule for solara sealed analysis or drawing from an Illinois licensed architect or structural engineer showing the roof can carry the weightCity of Edwardsville [31]Submittal requirements, Proposed Roof Plan
Edwardsville note on roof life and solarit is the owner's job to weigh the roof's remaining life against the panels', since the panels may outlast the roofCity of Edwardsville [31]Submittal requirements, Proposed Roof Plan
Edwardsville firefighter paths on a home solar roof36 inchesCity of Edwardsville [31]Submittal requirements, access pathways, Residential
Power one kW of panels makes in a year near Belleville, Illinois1,418 kWh/kW/yrNational Laboratory of the Rockies [22]PVWatts v8 API: lat 38.52, lon -89.98, 1 kW, roof mount, south-facing (180°), 25° tilt, 14% losses, NSRDB PSM V3 GOES tmy-2020 3.2.0 weather
Who provides electric service in Mascoutahthe city runs its own locally owned electric serviceCity of Mascoutah [32]Welcome to Mascoutah Utilities
Who provides electric service in Freeburgthe village has its own power plant and provides electric service to village homes and businessesVillage of Freeburg [33]Electric Services
Where Southwestern Electric Cooperative servesparts of St. Clair County, among other counties in southwestern IllinoisSouthwestern Electric Cooperative [34]Service Area
Where Egyptian Electric Cooperative servesportions of Saint Clair County, among other counties in southern IllinoisEgyptian Electric Cooperative Association [35]Mission Statement
Where Clinton County Electric Cooperative servesparts of St. Clair County, along with Clinton, Fayette, Madison, Marion and Washington countiesClinton County Electric Cooperative [27]About the cooperative (page footer)
Subdivisions Monroe County Electric Co-operative servessubdivisions it serves listed under Belleville, Freeburg and MillstadtMonroe County Electric Cooperative [36]Subdivisions Served by MCEC
When Swansea asks for a building permit for solara building permit for every home solar install, before any work startsVillage of Swansea [37]Opening paragraph
What Swansea asks of a solar installeran installer who is active in the Illinois Commerce Commission's utility company databaseVillage of Swansea [37]Submittal requirements, item 1
What a Swansea roof plan must show about the roofhow many roof layers the house has and about when it was last roofedVillage of Swansea [37]Submittal requirements, item 3e
Engineering Swansea asks for with a solar permitan analysis or drawing from an Illinois licensed structural engineerVillage of Swansea [37]Submittal requirements, item 4
When O'Fallon asks for a building permit for solara building permit when solar work changes the structureCity of O'Fallon [38]Residential Construction/Home-Improvement Permit
O'Fallon's permit for solar with no structural changessolar work with no structural changes can go on an electrical permit aloneCity of O'Fallon [38]Residential Construction/Home-Improvement Permit
Who issues permits inside Bellevillepermits through the city's Health, Housing & Building Department for any improvement to private property inside city limitsCity of Belleville [39]Permit Requirements & Applications
Belleville list of electrical contractors for solara list of electrical contractors the city has licensed for solar jobsCity of Belleville [39]Licensed Contractors
Who issues building permits in Fairview Heightsa building permit from the city's Building Permits and Inspections Department before improvements or alterations to a propertyCity of Fairview Heights [40]Building Permits & Inspections
Power one kW of panels makes in a year near Waterloo, Illinois1,431 kWh/kW/yrNational Laboratory of the Rockies [22]PVWatts v8 API: lat 38.34, lon -90.15, 1 kW, roof mount, south-facing (180°), 25° tilt, 14% losses, NSRDB PSM V3 GOES tmy-2020 3.2.0 weather
Who sells electric service in the City of Waterloothe City of Waterloo, through the Illinois Municipal Electric AgencyCity of Waterloo [41]Electric
The City of Waterloo power planta power plant the city has owned and run since 1901City of Waterloo [41]Power Plant
Solar rules for City of Waterloo electric customersits own interconnection agreement and net metering policyCity of Waterloo [41]Renewable Generation Sources
What the Monroe County Electric Cooperative was built to dobring power to rural parts of Monroe, Randolph and St. Clair counties that had noneMonroe County Electric Cooperative [42]History
Farms, homes and businesses the Monroe County Electric Cooperative serves today, across its whole territory6,700 membersMonroe County Electric Cooperative [42]History
Subdivisions the Monroe County Electric Cooperative lists as servedsubdivisions listed under Waterloo, Columbia and Valmeyer, among other townsMonroe County Electric Cooperative [36]Subdivisions Served by MCEC
When a co-op member's solar system may start runningnot until the co-op inspects the systemMonroe County Electric Cooperative [43]Solar Installation Information
Counties Egyptian Electric Cooperative servesserves members in parts of ten counties, Williamson among themEgyptian Electric Cooperative Association [35]Home page, Mission Statement
Counties SouthEastern Illinois Electric Cooperative servesprovides electric service to members in parts of Williamson CountySouthEastern Illinois Electric Cooperative [44]About Us, Summary & Mission Statement, Who We Are
Counties Southern Illinois Electric Cooperative servesnames Williamson as one of the southern Illinois counties where it has membersSouthern Illinois Electric Cooperative [45]About SIEC, About Us
SouthEastern Illinois Electric Cooperative's own rules for home generationits own net billing policy and its own application for member-owned generationSouthEastern Illinois Electric Cooperative [46]Distributed Generation Information
Who the City of Marion says provides its residents' electric utility serviceAmeren Illinois provides its residents' electric utility serviceCity of Marion [47]Electric Supply Aggregation & Community Solar, opening paragraph
The electric company the City of Carterville lists for the townlists Ameren Illinois as the town's electric companyCity of Carterville [48]Community, Utilities, Electric
Where Williamson County posts its building permit formsthe county's building permit application and its building permit ordinanceWilliamson County [49]Supervisor of Assessments, I Want To list
What Marion's Building and Code Services doesissues permits for development within the cityCity of Marion [50]Building and Code Services, Services
Who sets building permit rules inside Cartervillethe city sets its own building permit rulesCity of Carterville [51]Departments, Building/Zoning, Building Permits

Your rights before and after you sign

Checked Nov 3, 2026 to Nov 5, 2026

WhatValueSource
What marketing about the utility relationship must sayyou stay a utility customer, responsible for a utility billIllinois Power Agency [4]Section I.C.1, General Requirements (page 11)
Claims about the utility bill going awayno seller may say your utility bill goes awayIllinois Power Agency [4]Section I.C.1, General Requirements (page 11)
Green flag: the company explains you keep a utility billa good solar company tells you that you will still have a utility billIllinois Power Agency [5]Green Flags column
Red flag: a claim that the utility bill goes awaya red flag: a claim that your utility bill goes awayIllinois Power Agency [5]Red Flags column
Right to cancel, Illinois Shines contractsthree or more calendar days, for systems of 25 kW or lessIllinois Shines [7]Section 1, Common Contract Requirements for all business models
Disclosure Form comes before the contractyou sign the Disclosure Form before the contractIllinois Power Agency [4]Section V.A.1, Disclosure Form (page 27)
In-person review of the Disclosure Formthe agent must go through the whole form with you and take your questionsIllinois Power Agency [4]Section V.A.1, Disclosure Form (page 27)
Copies of what you signed24 hoursIllinois Power Agency [4]Section V.A.4, Presenting Copies to the Customer (page 29)
Battery costs on the Disclosure Formbattery costs and fees on the Disclosure FormIllinois Power Agency [4]Section V.A.1, Disclosure Form (page 27)
Green flag: time to reviewtime to review and understand the offerIllinois Power Agency [5]Green Flags column
Red flag: pressure to signa red flag: pressure to sign before you understand the offerIllinois Power Agency [5]Red Flags column
Green flag: registered with Illinois Shinesregistered with Illinois Shines as an Approved Vendor or DesigneeIllinois Power Agency [5]Green Flags column
Red flag: a record of program complaints or disciplinea red flag: a history of program complaints, violations, or disciplinary actionIllinois Power Agency [5]Red Flags column
Red flag: a claimed tie to a utility or the statea red flag: a company that suggests it is tied to a utility, the state, or a government agencyIllinois Power Agency [5]Red Flags column
Red flag: no chance to ask questionsa red flag: no chance to ask questions before you signIllinois Power Agency [5]Red Flags column
Red flag: a promise of panels at no chargea red flag: a promise of panels at no charge, or a claim that the government pays for the solarIllinois Power Agency [5]Red Flags column
Green flag: references on requestreferences from past customers when you askIllinois Power Agency [5]Green Flags column
Green flag: claims you can checkclaims that are factual and can be checkedIllinois Power Agency [5]Green Flags column
Where to see suspensions, warning letters and complaintsthe Program Violations Report and Consumer Complaint ReportIllinois Power Agency [5]Best Practices: Do your research
Compare more than one offerat least three estimatesIllinois Power Agency [5]Best Practices: Request and compare at least three estimates
Where to file a complaint with Illinois Shinesthe Consumer Complaint Center on the Illinois Shines websiteIllinois Power Agency [5]Complaints box
The Illinois Shines list of Approved Vendorsthe Find an Approved Vendor listIllinois Shines [11]Find an Approved Vendor
The Illinois Shines list of Designeesthe Find a Designee listIllinois Shines [11]Find a Designee
Kinds of Designeesinstallers, maintenance and repair, warranty holders, marketing firms, lead generators, and sales organizationsIllinois Shines [11]Designees
Installer Designees are ICC certifiedan Installer Designee must be certified by the Illinois Commerce CommissionIllinois Shines [11]Find a Designee: Installer Designee
What the Program Violations Report postswarning and suspension letters for companies found to have broken program rulesIllinois Shines [12]Program Violations Report
How long a warning letter stays on the report12 monthsIllinois Shines [12]Program Violations Report
What the Consumer Complaint Report listsevery consumer complaint the Program Administrator receives, and companies suspended from the programIllinois Shines [12]Consumer Complaint Reports
A complaint is the customer's accountthe subject of a complaint comes from the person who filed it, and may or may not match what happenedIllinois Shines [12]Consumer Complaint Reports
Complaint statusesUnder Investigation, Resolved, Closed, or ReopenedIllinois Shines [12]Consumer Complaint Reports
The yearly complaints reportan Annual Complaints Report the IPA files with the Illinois Commerce CommissionIllinois Shines [12]Annual Complaints Report
Who must be certified to install solar in Illinoiscertified by the ICC before installing, unless you install your own systemIllinois Commerce Commission [13]Applicability (Section 468.30)
The ICC list of certified installersthe ICC list of certified distributed generation installersIllinois Commerce Commission [13]Distributed Generation Installer Information
What install means under the ICC rulethe wiring and connections that tie the system to the utility gridIllinois Commerce Commission [13]Overview
A seller must name the Approved Vendorwho is making the offer and, if different, the Approved Vendor for the projectIllinois Power Agency [4]Section II, Requirements for All Marketing Channels (page 19)
Designees must registerevery Designee must register, and the program publishes the listIllinois Power Agency [4]Referenced Terms and Documents: Designee (page 4)
Restitution and unregistered companiesnot available for harm from an unregistered company, unless the company you signed with was registered and brought it inIllinois Power Agency [4]Section XII.A.2, Eligibility and Other Limitations on Claims (page 60)
Even with the program's checks, be carefuleven with these safeguards, be careful when you choose a companyIllinois Shines [14]Finding a Vendor You're Comfortable With
The Approved Vendor may not be the company you talk tothe Approved Vendor is not always the company that markets, sells, or installs your systemIllinois Shines [14]What Questions Should You Ask? About Your Vendor
Ask whether your contract can be soldwhether the company can sell your contract, and what happens if it goes out of businessIllinois Shines [14]What Questions Should You Ask? Contract Assignment
Ask who does the installationwho performs the installationIllinois Shines [14]What Questions Should You Ask? Panel Installation
Ask about roof work laterwhether they remove and reinstall the panels if your roof needs replacingIllinois Shines [14]What Questions Should You Ask? Support and Maintenance
What the Disclosure Form is forclear and consistent information about a solar offer, including size, cost and fees, operations and warrantiesIllinois Power Agency [5]Key Terms
Comparing offers with the formDisclosure Forms make it easy to compare offers from different sellersIllinois Power Agency [5]Key Terms
How many estimates to comparerequest and compare at least three estimatesIllinois Power Agency [5]Best Practices for Selecting a Solar Company
Which standard forms existseparate current forms for a purchase, a lease and a PPAIllinois Shines [23]Program Documents, Current Disclosure Forms
The Deep Dive toolwalks you through a sample form, section by sectionIllinois Shines [24]Deep Dive
The design comes firsta design for your site that accounts for its direction and shade, before the signing steps beginIllinois Power Agency [4]Section V.A, General Requirements (page 26)
Contract signing steps, in orderthe contract comes only after the earlier steps, done in orderIllinois Power Agency [4]Section V.A, General Requirements (pages 26 to 28)
The brochure attached to the formthe Informational Brochure attached as the first two pagesIllinois Power Agency [4]Section V.A.1, Disclosure Form (page 26)
The form cannot be changedgiven to you whole, never edited or changedIllinois Power Agency [4]Section V.A.1, Disclosure Form (page 26)
Every field filled inevery field filled in and accurate, with no line that only points you to the contractIllinois Power Agency [4]Section V.A.1, Disclosure Form (page 27)
Questions when you sign onlinea phone number or online chat for your questionsIllinois Power Agency [4]Section V.A.1, Disclosure Form (page 27)
Scrolling before you e-signthe platform must make you scroll through the whole form before you signIllinois Power Agency [4]Section V.A.1, Disclosure Form (page 27)
A paper copy on requesta paper copy of the form and brochure if you ask, and sign on paperIllinois Power Agency [4]Section V.A.1, Disclosure Form (page 27)
Who signs the formthe person who holds the utility accountIllinois Power Agency [4]Section V.A.1, Disclosure Form (page 27)
A new form when facts changea new form to sign if information on the first one changes or is wrongIllinois Power Agency [4]Section V.A.1, Disclosure Form (page 27)
Your email stays yoursthe agent may not set up or open your email, or send the form to their own emailIllinois Power Agency [4]Section V.A, General Requirements (page 26)
The contract must match the formcontract terms that match the Disclosure Form you signedIllinois Power Agency [4]Section V.A.3, Customer Contract (page 28)
The form must match what you were toldthe contract and form must match what the seller told youIllinois Power Agency [4]Section V.A.3, Customer Contract (page 28)
How to find your signed copiesthe agent must explain how you can view your signed copiesIllinois Power Agency [4]Section V.A.4, Presenting Copies to the Customer (page 29)
Paper copies by mail2 business daysIllinois Power Agency [4]Section V.A.4, Presenting Copies to the Customer (page 29)
Paper copies by hand3 business daysIllinois Power Agency [4]Section V.A.4, Presenting Copies to the Customer (page 29)
The agent names the companythe agent must name their company, and its Approved Vendor if it is a DesigneeIllinois Power Agency [4]Section III.A, Requirements that Apply to All In-Person Marketing (page 21)
The agent says they are independentthe agent must say they represent an independent seller, not the government or a utilityIllinois Power Agency [4]Section III.A, Requirements that Apply to All In-Person Marketing (page 21)
Signs that ban solicitingno selling at a home that posts a sign against solicitingIllinois Power Agency [4]Section III.A, Requirements that Apply to All In-Person Marketing (page 21)
The agent ID badgefor systems under 25 kW AC, a visible ID with the agent's full name, ID number, photo, and company name and logoIllinois Power Agency [4]Section III.A.1, Identification (page 22)
Background checks on agentscriminal background checks on every agent who sells in personIllinois Power Agency [4]Section III.A.2, Criminal Background Checks (page 22)
Door-to-door hoursnot before 9 a.m. or after 7 p.m., where no local rule sets the hoursIllinois Power Agency [4]Section III.A.3, Door-to-Door Solicitations to Residential Dwellings (page 22)
Local door-to-door rules come firstsellers must follow local door-to-door rules, including banned hours, and set meetings may fall outside the default hoursIllinois Power Agency [4]Section III.A.3, Door-to-Door Solicitations to Residential Dwellings (page 22)
Leaving when askedthe agent must leave the first time you askIllinois Power Agency [4]Section III.A.3, Door-to-Door Solicitations to Residential Dwellings (page 23)
Who owns a PPA systemyou buy the power, and another party owns the systemIllinois Shines [21]Opening notice (page 3)
Time to shop aroundtake whatever time you need to shop around and understand the contractIllinois Shines [21]Opening notice (page 3)
Canceling a PPA, in the form's wordscancel and get any deposit back by contacting the project owner, within the period your contract or the law allows, never less than three calendar daysIllinois Shines [21]Opening notice (page 3)
Where to take a complaintthe Illinois Shines Program Administrator, and the Attorney General's Consumer Protection Division for deceptive salesIllinois Shines [21]Opening notice (page 3)
Who is named on the formyou, the project owner, the Approved Vendor and the installer, with contact detailsIllinois Shines [21]Contact Information (page 3)
PPA length and ratesthe contract length, the first and final payment rates, and the yearly escalation rateIllinois Shines [21]PPA Information and Costs (page 4)
Fees and the estimated totalthe fees, other fees that may apply, and an estimate of the total you pay over the whole PPAIllinois Shines [21]PPA Information and Costs (page 4)
The incentive the Approved Vendor expectsthe incentive payment the Approved Vendor expects to receive if the project is acceptedIllinois Shines [21]Illinois Shines Incentive Payment (page 4)
If the project is not selectedwhether the deal depends on the project being selected, and whether price or terms change if it is notIllinois Shines [21]Illinois Shines Incentive Payment (page 4)
Installation datesestimated start and finish dates for the installationIllinois Shines [21]Project Installation (page 4)
UCC-1 fixture filingwhether the owner will file a UCC-1 fixture filingIllinois Shines [21]Project Installation (page 4)
System design linesthe system size, first-year output, your yearly use and the share solar covers, expected life, and where it is mountedIllinois Shines [21]Project Design Specifications (page 4)
Built size may differthe built size may vary by the greater of 1 kW or 5%Illinois Shines [21]Project Design Specifications (page 4)
The battery linewhether the project includes a battery, and what sizeIllinois Shines [21]Project Design Specifications (page 4)
Capacity factora measure you can use to compare expected output between offersIllinois Shines [21]Project Efficiency (page 5)
Net metering needs an applicationan application to your electric utilityIllinois Shines [21]Net Metering (page 5)
Upkeep, repairs and warrantieswho handles upkeep and repairs, the warranties for installation, panels, inverter and roof leaks, and insuranceIllinois Shines [21]Project Operations and Maintenance (page 5)
If you movewhether you can transfer the PPA to a buyer when you sell, and what that takesIllinois Shines [21]If You Move (page 5)
Early end and end of termany early termination fee, and whether at the end the owner removes the system, lets you own it, or offers a renewalIllinois Shines [21]Early Termination or Completion of Contract (pages 5 and 6)
Value estimates on the formlow, medium and high estimates of the value of the power, which the form says are not a promiseIllinois Shines [21]Value of Electricity section (page 6)
What your signature saysyou received and read the form and had the chance to ask questionsIllinois Shines [21]Signature (page 6)
Who the Solar Restitution Program covers in its first phaseonly customers who were promised a direct payment for their solar credits and never got itIllinois Power Agency [4]Section XII.A.2, Solar Restitution Program (page 60)
The three parts of electric servicesupply, the power itself; transmission, moving it to your local utility; and delivery, over the lines to your homePlug In Illinois [53]Electric Choice Basics, first paragraph

Sources

  1. Illinois Shines, FAQs Related to Changes in Net Metering in Illinois (July 26, 2024). Read Nov 5, 2026.
  2. Illinois Shines, Your Guide to Going Solar with Illinois Shines (June 2026). Read Nov 4, 2026.
  3. Illinois Power Agency, fact sheet on the three kinds of solar credits (September 2025). Read Nov 4, 2026.
  4. Illinois Power Agency, Consumer Protection Handbook for Illinois Shines and Illinois Solar for All, program year 2026-27. Read Nov 4, 2026.
  5. Illinois Power Agency, Selecting a Solar Company: Green and Red Flags (homeowner handout). Read Nov 4, 2026.
  6. U.S. Department of Energy, Homeowner's Guide to Going Solar. Read Nov 4, 2026.
  7. Illinois Shines, Distributed Generation Contract Requirements (April 18, 2024). Read Nov 4, 2026.
  8. IRS, Residential Clean Energy Credit. Read Nov 4, 2026.
  9. U.S. EIA, Electric Power Monthly, Table 5.6.A. Read Nov 4, 2026.
  10. Illinois Shines, Consumer FAQs. Read Nov 5, 2026.
  11. Illinois Shines, Find an Approved Vendor, Designee, or Subcontractor. Read Nov 4, 2026.
  12. Illinois Shines, Program Violations Report and Consumer Protection Database. Read Nov 4, 2026.
  13. Illinois Commerce Commission, Distributed Generation Installer. Read Nov 4, 2026.
  14. Illinois Shines, Explore Distributed Generation. Read Nov 4, 2026.
  15. IRS, FAQs for modification of sections 25C, 25D and other credits under Public Law 119-21 (FS-2025-05). Read Nov 4, 2026.
  16. U.S. Department of Energy, Solar and Resilience Basics. Read Nov 4, 2026.
  17. U.S. Department of Energy, Solar Integration: Distributed Energy Resources and Microgrids Basics. Read Nov 4, 2026.
  18. U.S. Department of Energy, Solar Integration: Inverters and Grid Services Basics. Read Nov 4, 2026.
  19. U.S. Department of Energy, Solar Integration: Solar Energy and Storage Basics. Read Nov 4, 2026.
  20. Illinois Shines, Navigating a Home Sale with an Illinois Shines Project Installed (August 2026). Read Nov 4, 2026.
  21. Illinois Shines, Power Purchase Agreement Disclosure Form (sample, June 1, 2026). Read Nov 4, 2026.
  22. National Laboratory of the Rockies (formerly NREL), PVWatts v8. Read Nov 4, 2026.
  23. Illinois Shines, Vendor Disclosure Form Resources. Read Nov 4, 2026.
  24. Illinois Shines, Disclosure Forms Deep Dive. Read Nov 4, 2026.
  25. Southwestern Electric Cooperative, About Us. Read Nov 4, 2026.
  26. MJM Electric Cooperative, home page. Read Nov 4, 2026.
  27. Clinton County Electric Cooperative, home page. Read Nov 4, 2026.
  28. Madison County, Building Permits & Inspections. Read Nov 4, 2026.
  29. Madison County, Permits & Inspections. Read Nov 4, 2026.
  30. Madison County, Building & Zoning FAQ. Read Nov 4, 2026.
  31. City of Edwardsville, Solar Panel Permit Requirements. Read Nov 4, 2026.
  32. City of Mascoutah, Utilities (Electric, Water & Sewer). Read Nov 4, 2026.
  33. Village of Freeburg, Electric Services. Read Nov 4, 2026.
  34. Southwestern Electric Cooperative, Service Area. Read Nov 4, 2026.
  35. Egyptian Electric Cooperative Association, home page. Read Nov 4, 2026.
  36. Monroe County Electric Cooperative, Subdivisions Served by MCEC. Read Nov 4, 2026.
  37. Village of Swansea, Solar Panel Permit Requirements. Read Nov 4, 2026.
  38. City of O'Fallon, Residential Construction/Home-Improvement Permit. Read Nov 4, 2026.
  39. City of Belleville, Health, Housing & Building. Read Nov 4, 2026.
  40. City of Fairview Heights, Permits. Read Nov 4, 2026.
  41. City of Waterloo, Electric Department. Read Nov 4, 2026.
  42. Monroe County Electric Cooperative, History. Read Nov 4, 2026.
  43. Monroe County Electric Cooperative, Solar Installation Information. Read Nov 4, 2026.
  44. SouthEastern Illinois Electric Cooperative. Read Nov 4, 2026.
  45. Southern Illinois Electric Cooperative. Read Nov 4, 2026.
  46. SouthEastern Illinois Electric Cooperative. Read Nov 4, 2026.
  47. City of Marion. Read Nov 4, 2026.
  48. City of Carterville. Read Nov 4, 2026.
  49. Williamson County, Supervisor of Assessments. Read Nov 4, 2026.
  50. City of Marion, Building and Code Services. Read Nov 4, 2026.
  51. City of Carterville, Building Permits. Read Nov 4, 2026.
  52. Illinois Power Agency, Power Hour webinar on net metering changes (November 15, 2024). Read Nov 5, 2026.
  53. Plug In Illinois, Electric Choice Basics. Read Nov 5, 2026.