Solar panels Illinois:

Prices, incentives and best companies 2023

Avg IL solar panel cost:

$9,031 - $11,038*

Avg 25 year savings:

$42,407 - $51,830

Avg payback period:

5.4 - 6.6 years

Estimate cost and savings based on your location and power usage

* Cost data based on quotes for fully-installed solar panel systems submitted on our platform. Prices are shown after applying the 30% federal tax credit.

Illinois solar panels guide 2023

Updated April 14, 2023

Illinois is a great place for homeowners to install solar. For residents who might shy away from the idea of solar due to the high price tag, there are great programs that make installing solar panels more accessible than ever. On top of that, there’s a 30% federal tax credit, state-wide net metering, and a property tax exemption, so solar can be an option for anyone!

On this page:

Solar power prices, savings and payback in your part of Illinois

The average cost for an installed residential solar system in Illinois is currently $10,781 after claiming the 30% federal solar tax credit. This is $2.57 per watt. However, there is some variance in solar prices in different parts of the state. The graph below shows the average cost of installed solar systems in your part of the state.

Cash flow graph based on cash purchase of a 5.0kW system

Are solar panels worth it in Illinois

Solar panels have fallen in price by more than 80% in the last ten years. In 2022 they also remain subsidized by the 30% federal tax credit and the net metering law, making them an excellent investment. They offer a return well above the long term average return from both the share market and also property investment.

Another way to look at this question is the levelized amount you will pay for each kWh of power you will use over the next 25 years with and without solar panels. As you can see below the savings are significant.

Levelized cost of solar energy
Levelized cost per kWh is the cost of the solar system divided by the total number of kWh produced by a solar system over it’s lifetime

7¢ /kWh

If you don't get solar

28¢ /kWh

(forecast avg Illinois electric rates over the next 25 years)

IL solar panel cost calculator

Best 10 solar installers in Illinois


Illinois solar incentives & tax credits

Federal solar tax credit

The federal tax credit is the most significant incentive to install solar panels for homes and businesses. Right now, the federal tax credit equals 30% of the total installed costs of installing a solar system and can save you thousands of dollars on your federal income taxes.

Net metering

Illinois has a state-wide net metering policy that requires utilities to offer customers credit equal to the retail rate of electricity in exchange for excess energy their solar system exports to the grid. Full retail net metering provides solar homeowners with the best electricity bill savings possible!

Illinois Shines program

The Illinois Shines program, also known as the Adjustable Block Program, gives Illinois residents the potential to save big on the cost of solar installation. Under this program, you can earn between $66 and $82 for every megawatt-hour (MWh) of solar energy your panels produce, depending on where you live. If your panels generate 6 MWh of electricity, you can earn between $396 and $492 on top of your electricity bill savings! 

Remember that the incentives' value decreases as more people join Illinois Shines. So, you'll want to install solar as soon as possible to get the maximum incentive!

Property tax exemption

Illinois does have a property tax exemption for solar panel systems. When installing solar, you can apply for a special property assessment. You can register your property with the chief county assessment officer, who will then assess your property in two ways: 

  • Assess the value of the property if it had a conventional energy system; and 
  • Assess the value of the property with the solar system.

You will then pay your taxes based on whichever property assessment is lower. 

Illinois Solar for All Program (ILSFA)

The state offers the Illinois Solar for All Program incentive to make solar more accessible to low-income households, nonprofit organizations, and public facilities.

For most projects, your eligibility is based on your income. The program is geared toward those with a household income of 80% or less of the area median income. Different criteria are used to determine eligibility for nonprofit and public facilities.

Once accepted, you must pick an approved vendor and plan your project. Approved solar companies are required to ensure you see savings on your electric bills.

Table 2: Available incentive programs
Eligibility: Federal incentive
Type: Personal Tax Credit
Eligibility: State incentive
Type: Property Tax Incentive

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Top models of solar panel installed in Illinois 2023

Average cost of solar panel installation in Illinois by system size

System size*
Cash purchase

(After tax credit)

Financed purchase

(After tax credit)

4kW $11,204 $11,988
5kW $13,420 $14,359
6kW $15,402 $16,480
7kW $17,780 $19,025
8kW $20,560 $21,999
9kW $22,374 $23,940
10kW $24,590 $26,311

Best solar companies in the main cities of Illinois

Different types of solar companies

Solar company reviews

Home solar basics

Is it better to lease or buy solar panels in Illinois

You will save most money by buying your solar system rather than leasing it. Read more about the pros and cons of leasing vs buying solar.

How long do solar panels last?

Minimum of 25 years but generally 30 or more

How do solar panels work on a home?

Solar panels power your house when they can but your home uses the utility company for power at other times. In 2023 "solar systems with battery storage" are becoming more popular. These are known as hybrid systems.

How do solar panels work?

Grid-tied solar system

A grid-tied system is the most common type of solar system. It has no solar battery for backup power and utilizes net metering to maximize savings. Solar panels are mounted on your roof then wired together, and the power generated flows into an inverter where direct current (DC) electricity is converted into alternating current (AC) electricity. This electricity is either used by your home or is exported to the utility grid.

Hybrid solar system

In hybrid solar systems, rooftop solar panels are connected to both a solar battery and the electric grid. The solar electricity generated by your panels that your home does not use is stored in the battery instead of being sent to the grid, which reduces your reliance on the utility while also providing backup power when needed. Battery storage is still expensive but you may be able to reduce costs by using state incentives.

Off-grid solar system

Off-grid solar systems are not connected to the grid at all, so all of your energy needs must be met by the sun. There is no utility to fall back on. The solar installation needs to power your home not only during the day, but after dark as well, so many solar panels and a large battery system are required. These systems are often expensive and don’t make sense for homes that have access to the grid.

Read more about types of home solar systems.

Do solar panels require regular maintenance?

No, but cleaning them can improve power generation if they are dirty.

Will residential solar power system cost fall in Illinois in 2023?

Given this environment, and the effect of import tariffs placed on solar panels by the Trump administration during 2018, it is hard to see that solar power system prices in Illinois will fall during 2023.

How much electricity do solar panel systems generate in Illinois?

Depending on the location, solar panels will generate different amounts of electricity.

A solar system that is installed on a south-facing 30-degree pitch roof Illinois will generate 1,150kWh of peak DC (direct current) capacity per year per 1kW in Illinois.

Enter your details into the solar panel calculator to see how your location, roof tilt, and roof direction impacts solar panel production.

What are the pros and cons of installing solar panels in Illinois?

The biggest advantage in Illinois for installing solar panels is the mandated net metering and 30% federal tax credit. The Illinois Shine program also offers huge savings for homeowners who go solar. The state’s commitment to making solar accessible through the ILSFA low-income is also a huge plus in our book.

The disadvantage of installing solar panels in Illinois is that state-wide incentives vary based on location and income, making determining what you qualify for difficult. Luckily, your solar installer can help you navigate what incentives you get.

Enter your details to calculate the cost and savings you are likely to get from installing solar panels for your home.

What you can learn from our state solar panel calculator

This solar calculator requires you to input your address, utility company, your average monthly power spend - it tells you:

If you want to see all of the above but also see live pricing, the three best solar deals available in your city and get binding quotes from each of these solar companies then use this Illinois solar panels calculator. This calculator requires you to also input your name and contact details because most of our 200+ installer partners will only authorize the sharing of their live solar pricing where we have validated that you are a real homeowner with a home in their service area. We respect the privacy of your data and only share your contact details with the solar companies you ask us to get binding quotes from.

Note: Please keep in mind that the best source of up-to-date information on incentives are the solar installers who specialize in your area.

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