Most homeowners who end up in bad solar deals did not see the red flags at the time. They were in a high-pressure sales environment, the contract was long and technical, and the salesperson was confident and reassuring. Here is what to look for -- whether you are evaluating a new deal or reviewing one you already signed.

Red Flag #1: Escalator Clauses

An escalator clause increases your monthly payment by a set percentage each year -- typically 2-3%. On a 20-year lease, a 3% annual escalator means your payment doubles over the life of the contract. If this was not clearly disclosed and explained, it is a significant red flag.

Red Flag #2: Dealer Fees

Dealer fees are fees charged by the solar company to the lender, which are then added to your loan balance. These fees can be 20-30% of the loan amount. They are often not disclosed to the homeowner, meaning you are borrowing significantly more than the actual cost of the system.

Red Flag #3: Vague Production Guarantees

A production guarantee should specify the minimum annual output in kilowatt-hours and what happens if the system does not meet that threshold. Vague language like "the system will produce enough to offset your bill" is not a guarantee -- it is a marketing statement.

Red Flag #4: Missing Cancellation Notice

The FTC Cooling-Off Rule requires sellers to give you a written Notice of Cancellation at the time of signing. If you did not receive this notice, the 3-day cancellation window may never have legally started.

Red Flag #5: Automatic Renewal Clauses

Some solar leases automatically renew at the end of the term unless you take specific action to cancel. If you miss the cancellation window, you could be locked in for another 5-10 years. These clauses are often buried in the fine print.