Solar answers for Illinois homeowners

Illinois solar questions, answered clearly.

Understand costs, incentives, utility bills, batteries, financing, system sizing, installation, and proposal terms before you make a decision.

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Illinois homeowners reviewing a residential solar plan with a solar advisor — Education first. Clear assumptions. Decisions built around your home.

Solar in Illinois

Yes. Illinois receives enough sunlight for residential solar to produce substantial amounts of electricity throughout the year. Modern solar panels can generate electricity even on cloudy days, although production is lower than on a sunny day.

The key is designing the system around your home's electricity usage, roof orientation, shading, utility territory, and future energy needs.

For many Illinois homeowners, solar can make financial sense because it can reduce the amount of electricity purchased from the utility while providing greater control over future energy costs.

The value depends on factors such as your current electricity usage, utility rates, available incentives, system price, financing terms, roof conditions, and how long you plan to own the home.

LuNova looks at the numbers for your specific property rather than assuming every homeowner will receive the same savings.

Electricity costs are made up of more than simply the advertised price per kilowatt-hour. Utility bills can include supply, transmission, distribution, taxes, fees, and other charges.

As electricity costs change over time, homeowners may find it increasingly difficult to predict what their electric bill will look like years from now.

Solar allows homeowners to generate some of their own electricity instead of purchasing all of it from the utility.

Solar can reduce your exposure to future utility rate increases because you generate some of your own electricity.

However, solar does not guarantee that your utility bill will never increase. Utility rates, fixed charges, net-metering rules, and other costs can change.

The goal is to reduce your dependence on purchased electricity—not promise that your utility bill will disappear.

Illinois Solar Incentives & Rebates

Illinois has state solar incentive programs administered by the Illinois Power Agency, including Illinois Shines and Illinois Solar for All.

Illinois Shines supports new residential and other distributed-generation solar projects through Renewable Energy Credit programs.

Eligibility and incentive values depend on the project and applicable program requirements.

Illinois Shines is a state-administered solar incentive program designed to support new distributed-generation and community-solar projects throughout Illinois.

For residential solar, the program can provide financial value associated with the Renewable Energy Credits generated by an eligible solar project.

The program is currently operating for the 2026–27 program year.

A Renewable Energy Credit represents the environmental attributes associated with renewable electricity generation.

In Illinois, eligible solar projects can participate in state programs that compensate for RECs generated by the project.

The value of RECs is separate from the electricity your solar panels generate.

Not necessarily.

Illinois incentives can operate differently from a traditional point-of-sale rebate. Illinois Shines uses REC contracts and approved program participants to provide economic incentives for eligible solar projects.

That's why homeowners should ask exactly how an incentive is being applied to their particular solar proposal.

No.

Incentive value can depend on the project, program category, eligibility, system characteristics, and applicable program rules.

LuNova recommends evaluating the actual incentive associated with your project rather than using a generic statewide estimate.

Illinois Solar for All is a separate state program designed to expand access to solar for income-eligible households and other qualifying participants.

It has different eligibility requirements from Illinois Shines.

If you believe you may qualify, ask LuNova about whether your project could fit an applicable program.

For residential clean-energy property placed in service after December 31, 2025, the IRS says the Residential Clean Energy Credit is no longer available under current federal law.

Federal law and individual tax circumstances can change, so confirm current eligibility with a qualified tax professional and review the current IRS guidance before relying on a credit.

LuNova does not provide tax advice.

Your Utility Bill

Your electric bill isn't determined solely by how many kilowatt-hours you use.

Depending on your utility, your bill may contain several components, including electricity supply, transmission, distribution, customer charges, taxes, and other fees.

That's why looking only at the advertised “price per kWh” can sometimes give an incomplete picture.

Your effective electricity cost can be different from the supply rate shown on your bill.

A homeowner's effective cost can be calculated by looking at the total applicable electric charges and dividing them by the electricity consumed.

LuNova can review your utility bill to help identify how much electricity you're actually purchasing and what charges may be offset by solar.

Utility electricity costs can change because of factors such as energy-market conditions, supply costs, transmission costs, distribution investments, regulatory decisions, and other approved utility charges.

Your utility determines the rates and charges applicable to your account.

Solar doesn't control utility rates—but it can reduce how much electricity you need to purchase from the grid.

Usually, you should not expect your utility bill to become literally $0.

Illinois Shines guidance specifically notes that utility bills can contain fixed charges that solar production does not eliminate. Solar can offset electricity usage and certain volumetric charges, but fixed utility charges may remain.

A reputable solar company should show you the expected remaining utility costs rather than promise a “zero electric bill.”

When your system produces more electricity than your home is consuming, excess electricity can flow back to the utility grid.

Depending on your utility and applicable rules, that excess generation can result in credits on your electric bill.

Illinois recognizes net metering as a mechanism through which eligible customers can receive bill credits for electricity supplied to the grid.

Net metering is a billing arrangement that can provide credits when an eligible solar system sends excess electricity to the grid.

The exact value and treatment of those credits depends on your utility, system, interconnection status, and applicable rules.

Because Illinois utility tariffs can change, LuNova evaluates the applicable utility rules when designing a system.

Yes.

Most grid-connected solar homes remain connected to the utility.

Your home can use solar electricity when it is available and draw electricity from the grid when additional electricity is needed.

Not necessarily.

A standard grid-connected solar system generally shuts down during a utility outage for safety reasons.

If you want backup power during an outage, you typically need an appropriately designed battery-storage system and backup equipment.

Solar Batteries

Not every homeowner needs one.

A battery may make sense if your priorities include:

Backup power
Reducing grid dependence
Using stored solar electricity later
Managing certain utility-rate structures
Increasing energy resilience

The right battery size depends on what you want to back up and how much electricity your home uses.

It can, depending on the system design.

Some homeowners install batteries to back up essential loads such as refrigerators, lights, internet, HVAC equipment, and selected circuits.

Others choose a larger system designed for whole-home backup.

LuNova can design the system around your priorities rather than automatically recommending the largest battery available.

Battery capacity is limited.

During an extended outage, the system must manage available stored energy carefully.

If solar production is available, the solar system may be able to recharge the battery depending on the equipment and system configuration.

Solar & Your Home

Not necessarily—but your roof should be evaluated.

If your roof is near the end of its useful life, installing solar first may create additional costs later if the panels have to be removed and reinstalled.

LuNova can help identify whether roofing should be addressed before solar installation.

Shading can reduce solar production.

Trees, chimneys, neighboring buildings, roof structures, and other obstructions should be considered during system design.

A professional solar assessment should account for shading rather than simply placing panels on every available section of roof.

An older electrical panel doesn't automatically prevent you from installing solar.

However, your electrical system needs to be evaluated to determine whether upgrades are required.

Potential electrical work should be identified before the project is finalized.

A properly designed and professionally installed solar system should not damage a sound roof.

Installation methods depend on the roofing material and structure.

The condition of the roof should be evaluated before installation.

Modern solar panels are designed for long-term operation and generally carry lengthy manufacturer warranties.

Actual production will gradually decline over time, which is commonly referred to as degradation.

The specific warranty and expected performance depend on the panel manufacturer and model selected for your project.

Solar can become part of the home's overall value proposition, but what happens to the solar agreement depends on how the system was purchased or financed.

Cash-owned systems, loans, leases, and power purchase agreements can have different requirements when a home is sold.

If you are considering selling your home, review the specific solar contract before listing the property.

Solar Financing

Common options include:

Cash purchase
Solar loan
Power Purchase Agreement (PPA)
Other third-party ownership structures

Each option has different costs, contract terms, ownership structures, and potential benefits.

LuNova's goal is to help homeowners understand the differences rather than recommending one financing method to everyone.

With a solar loan, the homeowner finances the purchase of the solar system.

The homeowner generally owns the system and is responsible for the loan according to the financing agreement.

A Power Purchase Agreement is a third-party ownership arrangement in which a solar provider owns the system and sells the electricity it produces to the homeowner under the terms of the agreement.

The homeowner doesn't necessarily purchase the solar system outright.

PPAs can have different payment structures, escalators, contract lengths, and buyout provisions, so homeowners should understand the complete agreement before signing.

This is one of the most important questions to ask.

A solar proposal should be evaluated against the electricity costs you are currently paying and may pay in the future—not simply against your current monthly utility bill.

A good comparison should consider:

Current utility cost + expected future utility costs vs. solar payment + remaining utility costs + applicable incentives and other costs.

Solar proposals can differ because of:

Equipment
System size
Production estimates
Roof complexity
Electrical work
Financing
Dealer or financing costs
Batteries
Roofing
Tree work
Warranties
Installation practices
Incentive assumptions

The cheapest proposal isn't necessarily the least expensive system over its useful life.

Solar Production

There is no universal number.

The appropriate system size depends on your historical electricity consumption, roof space, shading, panel characteristics, utility rules, and your desired level of energy offset.

Not always.

A 100% offset is a useful starting point, but the ideal system size depends on your specific situation.

Future electricity usage should also be considered.

For example, if you are planning to purchase an EV, install a heat pump, finish a basement, or add electric appliances, your future electricity consumption may be higher than your historical usage.

Possibly, but system sizing should be based on your actual circumstances and applicable utility and program rules.

More panels aren't automatically better.

The goal is to design a system that makes financial and practical sense for the homeowner.

Yes.

Solar panels continue to produce electricity during winter, although production is generally lower because of shorter daylight hours and weather conditions.

Annual production—not one individual month—is what should generally be used to evaluate the overall system.

Solar panels still produce electricity under cloudy conditions, but production is reduced compared with direct sunlight.

A properly designed system accounts for seasonal and weather-related production differences.

The Solar Sales Process

A typical process includes:

Reviewing your home and electricity usage
Identifying your utility
Reviewing your electric bill
Evaluating the roof and shading
Designing a preliminary solar system
Reviewing available incentives
Comparing financing options
Presenting estimated production and savings
Completing permitting and utility interconnection
Installing and commissioning the system

Having your recent electric bill is extremely helpful.

It can provide information about your electricity consumption, utility, rate structure, account details, and other information needed to create a more accurate proposal.

LuNova can use your actual energy history instead of relying on a generic household estimate.

Your address helps determine important project information such as:

Utility territory
Solar resource
Property characteristics
Roof orientation
Potential shading
Applicable program considerations
Installation requirements

Your address is an important part of creating a property-specific solar assessment.

A professional installation process should include appropriate site evaluation and verification.

The exact inspection process depends on the project, roof type, installation company, and permitting requirements.

The physical installation may take significantly less time than the entire project.

The overall process can include design, engineering, permitting, utility approval, installation, inspection, and interconnection.

Timelines vary by project and local jurisdiction.

Questions Homeowners Should Ask Every Solar Company

Don't look only at the monthly payment.

Ask for the total project cost and understand exactly what is included.

Production is one of the most important numbers in a solar proposal.

Ask how many kilowatt-hours the system is expected to generate and what assumptions were used.

Ask what production assumptions were used and what warranties apply.

A production estimate is not necessarily a guarantee of actual production.

Ask whether the proposal includes:

Solar panels
Inverters
Racking
Permitting
Interconnection
Installation
Monitoring
Electrical upgrades
Roofing
Tree work
Battery storage
Other required work

Unexpected adders can significantly change the final project cost.

This is especially important when comparing cash, loans, leases, and PPAs.

Make sure you understand who owns the equipment, who is responsible for maintenance, and what happens if you sell your home.

Ask before signing.

The answer depends on whether you own the system or have a third-party ownership agreement.

Your contract should clearly explain the transfer, payoff, buyout, or other requirements.

Illinois homeowners should understand who they are doing business with.

Illinois Shines participating companies are subject to program requirements and consumer-protection standards.

Homeowners should verify the company, contract, warranties, and incentive claims before signing.

LuNova's Approach

No reputable solar company should guarantee savings without knowing the homeowner's actual situation.

Savings depend on electricity usage, utility rates, system production, financing, incentives, equipment, and other factors.

LuNova's job is to show you the numbers and help you make an informed decision.

No.

Solar can significantly reduce electricity purchases, but utility bills may contain fixed charges that remain even when solar offsets much or all of your electricity usage. Illinois Shines guidance specifically prohibits participating vendors from claiming that solar will eliminate a customer's utility bill.

Illinois has its own utility structures, solar incentives, interconnection rules, and renewable-energy programs.

A solar proposal that makes sense in California or Texas may not be the right model for an Illinois homeowner.

LuNova focuses on designing solar solutions around Illinois homeowners and their actual utility situation.

Yes.

The first step isn't necessarily buying solar.

The first step is determining whether solar makes sense for your home.

LuNova can review your electricity usage, utility, property, roof, available incentives, financing options, and expected solar production so you can make an informed decision.

Still Have Questions?

That's exactly what a solar consultation is for.

You don't need to understand solar before requesting an assessment.

Start with your address and recent electric bill. LuNova can help explain your electricity usage, utility costs, potential solar production, available incentives, and financing options in plain language.

No pressure. No confusing sales pitch. Just the numbers.

Get Your LuNova Solar Assessment

See what solar could look like for your Illinois home.

Request a Solar Quote

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Verify the details

Trusted solar resources

Program rules, tax guidance, and utility requirements can change. These independent sources are useful places to confirm the current details.

Illinois program Illinois Shines Official program information about distributed solar, Renewable Energy Credits, and consumer resources. Visit official source ↗ Federal guidance IRS clean-energy credit page Check the current federal tax rules. The IRS states that the residential credit is unavailable for property placed in service after December 31, 2025. Read IRS guidance ↗ Consumer education U.S. Department of Energy Use the Homeowner’s Guide to Solar to review roof suitability, installer selection, financing, and consumer-protection basics. Open homeowner guide ↗

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Important Disclaimer

Solar production, savings, utility rates, incentives, rebates, tax benefits, net-metering credits, financing terms, and program eligibility can vary by homeowner and may change over time.

Information on this page is provided for general educational purposes and is not tax, legal, financial, or utility-rate advice.

Illinois solar incentive programs and utility tariffs are subject to applicable laws, regulations, program rules, and funding availability.

LuNova recommends reviewing the specific terms of your solar proposal and applicable program requirements before making a purchasing decision.