Solar Sales Red Flags in Illinois: 10 Things That Should Make You Slow Down Before Signing

Updated: September 4, 2026 · Estimated read time: 10 minutes

The salesperson is sitting at your kitchen table.

The solar proposal looks impressive.

There's a monthly payment, a picture of your roof covered in panels, a projected savings number—and then comes the question:

“So, are you ready to sign?”

Maybe the proposal is excellent.

But solar is a major home and financial decision, and you should never need to rely on pressure, vague promises, or numbers you don't understand.

Illinois Shines—the state's solar incentive program administered under the Illinois Power Agency—actually publishes consumer guidance identifying both green flags and red flags homeowners should watch for when selecting a solar company.

Some of the biggest warning signs are surprisingly simple.

Here are 10 solar sales red flags Illinois homeowners should recognize before signing anything.

Quick Answer

Slow down before signing a solar agreement if the salesperson:

• Suggests they're from your utility or the government when they aren't

• Promises “free solar”

• Says your utility bill will completely disappear

• Pressures you to sign immediately

• Won't clearly explain the Illinois Shines Disclosure Form

• Makes savings claims they can't support

• Focuses only on the monthly payment

• Can't explain why your system is sized the way it is

• Avoids explaining ownership, escalators, transfer terms, or warranties

• Doesn't want you comparing other offers or researching the company

One red flag doesn't automatically mean a company is dishonest.

But it should make you ask more questions.

The goal isn't to become suspicious of every solar company.

It's to become an informed homeowner.

Table of Contents

1. “We're with the utility” or “this is a government program”

2. “Your solar is free”

3. “You'll never have an electric bill again”

4. “You have to sign today”

5. You're asked to sign before understanding your Illinois Shines Disclosure Form

6. The savings numbers can't be explained

7. Everything revolves around the monthly payment

8. Nobody can explain why you need that many panels

9. Ownership and long-term terms are vague

10. They don't want you comparing or researching

11. What green flags should you look for instead?

12. How to check an Illinois solar company

13. Questions to ask before signing

14. What to do if you believe you've been misled

15. Frequently asked questions

Red Flag #1: “We're With the Utility” or “This Is a Government Program”

Be careful when solar marketing makes it sound like the salesperson is:

From Ameren.

From ComEd.

From the State of Illinois.

Sent by Illinois Shines.

or:

Representing a government solar program.

Illinois Shines specifically identifies misrepresenting or suggesting an affiliation with a utility, the state, a government agency, or government program as a red flag.

A legitimate solar company may work with:

• Illinois Shines

• Ameren Illinois

• ComEd

• Other utilities

• Approved Vendors

• Financing companies

• Installers

But working with an organization isn't the same thing as being that organization.

Ask:

“What company do you actually work for?”

Then:

“Are you an Illinois Shines Approved Vendor or Designee?”

The Illinois Shines Disclosure Form should clearly identify the companies involved in your project.

For official consumer guidance, see Illinois Shines' consumer resources.

Red Flag #2: “Your Solar Is Free”

Solar can sometimes be installed with:

$0 upfront

but that doesn't necessarily mean:

Free.

Those are very different statements.

A $0-upfront solar project might involve:

• A solar loan

• A lease

• A Power Purchase Agreement

• Another financing structure

With a PPA, for example, a third party generally owns the solar equipment while the homeowner agrees to purchase the electricity it generates.

You may not write a large check on installation day.

But there is still an economic agreement.

Illinois Shines specifically warns homeowners about claims involving “free solar panels” or claims that the government is simply paying for the system.

Whenever you hear:

“It's free.”

ask:

Who owns the system?

What am I paying?

For how many years?

Does the payment increase?

Who receives the incentives?

If you're considering a third-party-owned option, read LuNova's Illinois homeowner's guide to solar PPAs.

Red Flag #3: “You'll Never Have an Electric Bill Again”

This one should immediately trigger another question:

“Can you show me exactly why?”

Solar can substantially reduce the amount of electricity you need to purchase from your utility.

But solar doesn't automatically eliminate:

• Customer charges

• Delivery-related charges

• Taxes

• Riders

• Electricity pulled from the grid

• Other utility-specific charges

Illinois Shines specifically identifies claims that solar will “eliminate your utility bill” as a red flag.

This is especially important under Illinois' newer net-metering structure.

New residential and small-commercial solar customers in Ameren Illinois, ComEd, and MidAmerican territory generally no longer receive the same full-retail net-metering treatment available to many older qualifying systems.

That means:

100% annual solar offset does not necessarily equal a $0 utility bill.

For the full explanation, read our Illinois Net Metering 2026 guide.

And if a proposal says 100%, 110%, or another offset number, our solar offset guide explains what that percentage actually means.

Red Flag #4: “You Have to Sign Today”

The price disappears tonight.

The incentive expires at midnight.

The manager only authorized this deal while the salesperson is sitting in your house.

The remaining installation slots are disappearing.

Could a legitimate promotion or deadline occasionally exist?

Of course.

But pressure shouldn't replace understanding.

Illinois Shines specifically identifies high-pressure sales tactics and urging a homeowner to sign before understanding or considering the offer as red flags.

Solar agreements can involve:

• Tens of thousands of dollars

• 20- or 25-year financing

• PPA escalators

• Roof modifications

• Utility interconnection

• REC agreements

• Battery-storage obligations

• Long-term warranties

You should have enough time to understand what you're agreeing to.

A reputable salesperson should be able to explain the proposal without making comprehension feel like an inconvenience.

Red Flag #5: You Don't Understand the Illinois Shines Disclosure Form

This is one of the most important Illinois-specific protections.

For qualifying Illinois Shines distributed-generation projects, customers must receive a standardized Disclosure Form.

Illinois Shines says the customer must sign the completed Disclosure Form before signing the installation contract.

There are different forms depending on how the solar project is structured:

• Purchase

• Lease

• Power Purchase Agreement

The form is designed to help homeowners understand major project details such as:

• Companies involved

• System information

• Costs

• Financing

• Expected production

• Savings estimates

• Incentive treatment

• Important contract terms

You should not be treated as an obstacle because you want to read it.

Illinois Shines explicitly identifies situations where customers aren't given an opportunity to ask questions about the Disclosure Form or contract as a warning sign.

Use the official Illinois Shines Disclosure Form Deep Dive if you want help understanding what you're looking at.

CHECK THE NUMBERS BEFORE YOU SIGN

Already have a solar quote?

Before focusing on the monthly payment, understand:

Your electricity usage.

System size.

Annual production.

Solar offset.

Utility.

Battery.

Financing structure.

Long-term payment terms.

CHECK MY HOME

LuNova Solar can help you start with your actual home and energy usage rather than a generic sales pitch.

Solar estimates, incentive eligibility, electricity production, and projected savings vary by property, utility, financing, equipment, weather, usage, and other factors.

Red Flag #6: The Savings Number Can't Be Explained

Imagine a proposal says:

“Save $84,217!”

That's an attention-grabbing number.

But where did it come from?

Ask:

What future utility-rate increases did you assume?

How much electricity is the system expected to produce each year?

Does the estimate account for panel degradation?

Does it account for financing payments?

Does the PPA rate increase?

Which utility charges remain?

What happens under current net-metering rules?

Are incentives already included?

Illinois Shines' homeowner guidance says solar-company savings claims should be factual and verifiable and supported with documentation.

Nobody can know with certainty what your electric rate will be 18 years from now.

A projection can be useful.

But a projection should be presented as a projection—not as guaranteed future reality.

Our article on Illinois electricity costs and whether solar makes sense in 2026 explains why homeowners should compare assumptions rather than rely on one dramatic savings number.

Red Flag #7: Everything Revolves Around the Monthly Payment

Imagine two solar proposals.

Proposal A

$179 per month

Proposal B

$219 per month

Which is cheaper?

You don't know yet.

Proposal A could involve:

• A longer financing term

• Higher financing costs

• A smaller solar system

• Less production

• A PPA escalator

Proposal B could potentially include:

• More useful production

• Better equipment

• Different ownership

• Different financing

• Battery storage

• Different contract terms

Monthly payment matters.

But it's only one number.

Ask for:

Total project price

System size

Price per watt

Annual production

Solar offset

Interest rate

Loan term

PPA starting rate

PPA escalator

Battery cost

Total expected contract payments

Applicable incentives

Ownership

If you're financing the project, review LuNova's Illinois solar financing guide.

Red Flag #8: Nobody Can Explain Why You Need That Many Panels

“Your home needs 34 panels.”

Okay.

Why?

The answer shouldn't be:

“That's what our software generated.”

or:

“We always design to 110%.”

Your solar system should be designed around things such as:

• Actual annual electricity usage

• Reasonable future electricity needs

• Roof orientation

• Shading

• Available roof space

• Solar production

• Utility rules

• Net metering

• Battery plans

• Project economics

A homeowner planning to buy two electric vehicles may reasonably need more electricity in the future.

A homeowner whose children are leaving home may potentially use less.

The correct offset isn't automatically:

90%.

100%.

or:

110%.

It's whatever system design makes sense after considering the home.

Read our full guide to 100% vs. 110% solar offset in Illinois.

And before accepting a design, review the 7 things Illinois homeowners should check before going solar.

Red Flag #9: Ownership and Long-Term Terms Are Vague

Ask one simple question:

“Who owns the solar panels?”

If you don't get a clear answer, don't move on.

Ownership affects:

• Incentives

• Maintenance

• Financing

• Transfer requirements

• Home sale

• Buyout rights

• Contract obligations

With cash or many solar loans, the homeowner generally owns the system.

With a PPA or lease, a third party generally owns it.

If the agreement has an escalator, ask how it works.

If there's a buyout option, ask when it becomes available and how the price is calculated.

If you're selling your home later, ask what happens.

If the buyer needs to qualify to take over a PPA, you should know that before you sign the original agreement.

Our guide to selling a house with solar in Illinois walks through owned systems, solar loans, PPAs, Illinois Shines, UCC filings, and transfers.

Long-term questions aren't something to worry about “later.”

Later eventually arrives.

Red Flag #10: They Don't Want You Comparing Offers or Researching the Company

A salesperson who says:

“Don't compare this with other companies because nobody else can offer what we have.”

should make you curious.

Illinois Shines encourages homeowners to obtain multiple bids and use the standardized Disclosure Forms to compare differently structured offers.

The program also recommends:

• Asking for customer references

• Reviewing Consumer Complaints Reports

• Reviewing Program Violations Reports

• Checking whether companies are appropriately registered

A good proposal should survive comparison.

You should be able to ask:

Why is your price higher?

Why is your system smaller?

Why are you recommending a battery?

Why is your production estimate different?

Why is your financing different?

and receive understandable answers.

Solar should become clearer as you ask questions.

Not more confusing.

What Green Flags Should You Look For?

Red flags are useful.

But knowing what a good solar experience looks like is even better.

Illinois Shines identifies several positive signs.

A strong solar company should:

Clearly identify who they are

No pretending to be your utility or the government.

Be properly registered for Illinois Shines participation

When applicable, the Approved Vendor and Designee relationships should be clear.

Provide and explain the Disclosure Form

Before you sign the installation contract.

Allow time for questions

You shouldn't feel rushed.

Support its financial claims

Savings projections should have understandable assumptions.

Understand your utility

An Ameren proposal shouldn't blindly use ComEd rules.

And neither should automatically be applied to a Springfield CWLP customer.

Provide customer references when requested

Real experience matters.

Explain what happens after the sale

Installation, inspection, interconnection, monitoring, warranties, service, and future home-sale questions should all have answers.

The experience should feel like:

Education → comparison → decision

not:

Pitch → pressure → signature.

How Can You Check an Illinois Solar Company?

Illinois homeowners have more resources than many people realize.

The official Illinois Shines Consumer Resources include homeowner education materials.

You can also review:

Consumer Complaints Reports

and:

Program Violations Reports

through Illinois Shines.

A complaint doesn't automatically prove a company did something wrong.

Context matters.

Company size matters.

Resolution matters.

But repeated complaints, warnings, suspensions, or disciplinary action deserve closer examination.

You can also ask the company:

Who is your Illinois Shines Approved Vendor?

Who is the Designee?

Who is actually installing the system?

Who provides service afterward?

There may be several companies involved.

You should know who they are.

What If the Solar Proposal Includes a Battery?

Don't assume the battery is automatically necessary.

Ask:

Why is the battery being recommended?

Backup?

Self-consumption?

Utility-program participation?

What will it actually power during an outage?

Not every battery provides unlimited whole-home backup.

How much usable capacity does it have?

What is its power output?

Can solar recharge it during an outage?

What rebates apply?

What obligations come with those rebates?

For a full breakdown, read LuNova's Solar Battery or No Battery? Illinois Homeowner Guide.

A battery should solve an identifiable problem.

It shouldn't simply be added because:

“Everybody gets one.”

12 Questions to Ask Before Signing a Solar Agreement

Before signing, ask:

1. Who owns the system?

You or a third party?

2. What is the total project cost?

Not just the monthly payment.

3. What does my home currently use each year?

Ask for annual kWh.

4. What will the system produce?

Again, ask for kWh.

5. What offset does that create?

And why was that percentage chosen?

6. Which utility rules are you using?

Ameren? ComEd? CWLP? Something else?

7. What happens to my utility bill after solar?

Which charges remain?

8. What incentives are included?

And who receives them?

For current program information, see our Illinois Solar Incentives 2026 guide.

9. What happens if I sell the house?

Especially important with loans, leases, and PPAs.

10. What warranties apply?

Panels, inverter, battery, workmanship, roof penetrations, monitoring.

11. Who services the system after installation?

Get the actual company name and process.

12. Can I take the proposal home and review it?

The answer should not create drama.

What If You Think You've Been Misled?

Start by documenting what happened.

Keep:

• Proposal documents

• Contracts

• Disclosure Forms

• Emails

• Text messages

• Advertisements

• Screenshots

• Financing documents

• Names and dates

If the project participates in Illinois Shines, consumers can contact the program's Consumer Protection team and submit a complaint.

Illinois Shines' current FAQs also advise consumers who believe they were victims of fraud, deception, or unfair practices that they may contact the Consumer Protection Division of the Illinois Attorney General's Office.

Questions specifically involving a financing company may also involve the appropriate Illinois financial regulator.

Visit the official Illinois Shines Consumer FAQs for current complaint and consumer-support information.

The point isn't to threaten companies whenever you disagree.

It's to know that consumer protections and complaint processes exist if something genuinely goes wrong.

Frequently Asked Questions

Is door-to-door solar illegal in Illinois?

Not simply because it's door-to-door. The important issues are whether the salesperson follows applicable consumer-protection, marketing, disclosure, solicitation, and program requirements. Evaluate the company and proposal the same way you would any other solar offer.

Is “free solar” actually free?

Usually, “$0 upfront” and “free” are not the same thing. A homeowner may be entering a loan, lease, PPA, or another agreement even when no large upfront payment is required.

Can a solar company promise that my electric bill will disappear?

Be cautious. Illinois Shines specifically identifies claims that solar will eliminate the utility bill as a red flag. Fixed charges and other utility costs can remain even with a high annual solar offset.

Do I have to sign the Illinois Shines Disclosure Form?

For participating Illinois Shines distributed-generation projects, the standardized Disclosure Form is a required part of the process and must be signed before the installation contract.

Should I get more than one solar quote?

Yes. Illinois Shines encourages homeowners to consider multiple bids and use Disclosure Forms to compare offers, costs, projections, and financing structures.

Is a 110% solar offset a red flag?

No. An offset above 100% can be reasonable when future electrical requirements or other project considerations support it. The red flag is when nobody can explain why that system size was chosen.

Is a PPA a bad deal?

Not automatically. PPAs can make sense for some households, but homeowners should understand the starting electricity rate, escalator, contract length, ownership, transfer terms, buyout options, and total long-term economics.

Should every solar system include a battery?

No. Battery storage can provide backup power and increase self-consumption, but its cost and benefits should be compared against a solar-only system.

The Best Solar Salesperson Should Be Comfortable With an Educated Customer

Asking questions doesn't make you difficult.

Requesting documentation doesn't make you distrustful.

Comparing proposals doesn't mean you're wasting someone's time.

You're deciding what happens to your roof, your electricity, and potentially tens of thousands of dollars over many years.

You should understand the decision.

At LuNova Solar, we believe the better question isn't:

“How do we get the homeowner to sign?”

It's:

“Does the homeowner understand what they're signing?”

If the answer is yes—and the numbers make sense—the decision becomes much easier.

See If Solar Makes Sense for Your Home

Before signing a proposal, start with your actual numbers.

Your home.

Your electricity usage.

Your roof.

Your utility.

Your future energy needs.

Then compare the available options.

SEE IF YOUR HOME QUALIFIES

No artificial deadline.

No automatic battery upsell.

No arbitrary panel count.

Just a clearer look at whether solar makes sense for your home.

Related Illinois Solar Guides

Before You Go Solar in Illinois: 7 Things Every Homeowner Should Check

100% vs. 110% Solar Offset: How Much Solar Does an Illinois Home Actually Need?

What Is a Solar PPA? The Illinois Homeowner's Guide

Illinois Net Metering Changed: What Homeowners Need to Know

Solar Battery or No Battery? What Illinois Homeowners Actually Need

Illinois Solar Incentives in 2026

Selling a House With Solar in Illinois

Illinois Solar Financing Options

Illinois Solar Questions & Answers

Sources & References

Illinois Shines — Selecting a Solar Company: Green and Red Flags

Illinois Shines — Disclosure Forms Deep Dive

Illinois Shines — Consumer FAQs

Illinois Shines — 2026–27 Program Documents and Consumer Protection Handbook

Illinois Shines — Exploring Solar Panels and Selecting a Company

LuNova Solar provides general educational information and does not provide legal, tax, lending, engineering, or financial advice. Solar contracts, financing terms, utility tariffs, incentives, production estimates, and program requirements vary and can change. Review your actual written agreement and current Illinois Shines and utility materials before making a decision.

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