- Ask for the cash price, even if you plan to finance. It is the only way to see what financing adds.
- Check the production estimate against an independent figure and against your own annual usage.
- In Texas, export credit depends on your retail plan. Savings that assume full net metering need verifying.
Have a proposal in hand? Enter its numbers and see what is worth asking about.
Open the Solar Quote Checker →None of the items below proves anything about a company. Each is a place where a homeowner often does not have the information needed to judge the deal, and where a good installer will have a clear answer.
1. "Free solar" or "no cost to you"
Zero upfront cost usually means a lease or a power purchase agreement (PPA). You make payments for 20 to 25 years and the provider owns the equipment.
Ask: Is this a purchase, a loan, a lease or a PPA? Who owns the system? What is the total of all payments over the term?
2. An annual escalator
Many leases and PPAs raise the payment every year, commonly by a few percent. Compounded over 25 years, a 2.9% escalator roughly doubles the starting payment. The pitch is that utility rates will rise faster; they may or may not.
Ask: What is the escalator? What is the payment in the final year? What happens if my electricity rate does not rise as assumed?
3. A financed price higher than the cash price
Low-interest solar loans are often paired with a higher system price. The difference is commonly a fee paid to the lender to buy down the rate, and it can be a meaningful share of the loan.
Ask: What is the cash price for this exact system? Is there a dealer or lender fee in the financed price, and how much is it in dollars?
4. A tax credit that no longer applies
The federal residential solar credit does not apply to systems placed in service after December 31, 2025. Some sales material has not caught up.
Ask: Does this price or payback assume any tax credit? Which one, and who claims it?
5. Production numbers you cannot check
Savings depend on how much the system produces. An estimate well above what similar systems produce in your area should come with an explanation: a very good roof, or optimistic assumptions.
Ask: What software and shade measurement produced this estimate? What losses did you assume? Is production guaranteed, and what happens if it falls short?
6. Savings that assume full credit for exported power
Texas has no statewide net metering. In the deregulated market, what you are paid for exported solar depends on the retail electricity plan you choose, and many plans pay less than the retail rate or cap the credit. Municipal utilities and cooperatives set their own terms.
Ask: What export credit did the savings estimate assume? Which retail plan is that, and can I see its terms?
7. A system sized well above your usage
An array that produces far more than you use only pays if the excess is credited well. Otherwise you are buying capacity that earns little.
Ask: What annual usage did you size this for? Why is the system larger than that?
8. Vague equipment, warranty or cancellation terms
A complete proposal names the panel and inverter models, states the workmanship warranty and who performs warranty labor, and explains cancellation, transfer on sale of the home, and any lien or UCC filing connected to financing.
Ask: Which exact models? Who do I call for service in year eight? What happens to the agreement if I sell the house? Will anything be filed against my property?
Pressure is a signal too
A price that is "only good today" is a sales technique, not a market condition. A sound proposal will still be sound after you have compared it with two others and slept on it.
A simple process
- Find your annual kWh usage.
- Estimate what you need with the Solar Size Calculator before any salesperson visits.
- Get at least three itemized proposals.
- Run each through the Solar Quote Checker and bring its question list to the installer.
- Read the full contract, including cancellation and transfer terms, before signing. For a large commitment, a short review by an attorney is inexpensive insurance.
Common questions
Solar offered at no upfront cost is normally a lease or a power purchase agreement. You pay monthly, usually for 20 to 25 years and often with annual increases, for equipment you do not own. That can still be a reasonable deal, but it is a long-term contract, not a free system.
It depends on the numbers. Buying means you own the system and keep all of its savings. A lease or PPA means no upfront cost but a long payment obligation and no ownership unless you buy it out. Compare total payments over the term and the cost per kWh. The Solar Quote Checker does both.
Not as a homeowner buying a system installed after December 31, 2025. The residential credit ended on that date. A proposal that subtracts a 30% federal credit from a homeowner-owned system installed in 2026 or later is using outdated numbers.
For many sales made at your home, the federal Cooling-Off Rule gives you three business days to cancel, and the seller must tell you about that right. Contracts and state law may give additional rights. Read the cancellation section before you sign and ask an attorney if the stakes are high.