Quotes That Show Only a Monthly Payment
Don't worry about the total. What matters is your payment is only $158 a month, which is less than your electric bill.
What's actually true
A monthly payment hides the total price, the system size, the price per watt and any dealer fee built into the loan. Two quotes with similar payments can differ by thousands of dollars in total cost.
If a solar proposal shows a monthly payment but not a total price, you can’t tell whether it’s a good deal. A low payment can come from a long loan, a teaser rate paid for by a hidden dealer fee, or a lease escalator. The numbers that let you compare quotes are the cash price, system size in kW, price per watt, and equipment model numbers. A good installer will give you all four without hesitation.
Why salespeople do it
People budget monthly, so a payment feels easy to judge: “$158 is less than my $180 bill.” It also keeps you from asking the questions that reveal the markup. A low payment can hide a high price, and the CFPB has warned that solar loans often include hidden dealer fees, typically 10% to 30% of the cash price and sometimes more than 50%.
A worked example
Two quotes for the same 8 kW system:
| Quote A | Quote B | |
|---|---|---|
| Cash price | $24,000 ($3.00/W) | Not shown |
| Financing | Your own HELOC, 7.34%, 10 years | Installer loan, 3.99%, 25 years |
| Loan amount | $24,000 | $30,000 (includes $6,000 dealer fee) |
| Monthly payment | about $283 | about $158 |
| Total paid | about $33,900 | about $47,500 |
Quote B “wins” on monthly payment and loses by about $13,500 in total cost. It also costs $3.75/W once the dealer fee is included. The HELOC rate is Bankrate’s national average as of October 2026 (HELOC rates are usually variable, so this assumes it stays flat); the $3.00/W cash price matches the 2025 national median for cash purchases from LBNL, which also found loan-financed systems cost a median $4.50/W.
Interest on the HELOC is real money too, which is why the fair comparison is total cost and price per watt, not payment.
Bottom line: Always ask, “What’s the cash price?” If the cash price is lower than the loan amount, the difference is a fee you’re paying for the “low” rate.
How it shows up in a quote
- A big payment number on page one, with the total buried in a loan disclosure or missing.
- “Price per panel” (for example, “$1,200 per panel”) with no wattage, so you can’t compute $/W.
- A “net cost” that subtracts incentives you may not get. In 2026, a cash or loan purchase gets no federal homeowner tax credit (see federal solar tax credit 2026).
- For leases and PPAs: a first-year payment with the annual escalator in small print. See escalator clauses.
How to compute price per watt yourself
Price per watt = total price ÷ system size in watts. A $24,000 system at 8 kW (8,000 W) is $3.00/W. If the quote gives a panel count and wattage, multiply them: 20 panels × 400 W = 8,000 W. See what a good price per watt is for current ranges by state.
Questions to ask
- “What is the cash price for this exact system?”
- “What’s the system size in kW DC, and what are the panel and inverter model numbers?”
- “What is the total loan amount, and how much of it is a dealer or platform fee?”
- “What’s the total of all payments over the loan term?”
- “Does the payment change at any point, for example after 18 months?” (See reamortization balloon.)
Tools and where to report
Use the dealer fee calculator to find a hidden fee, the solar loan calculator to check total cost, and compare quotes side by side. Our guide on how to compare solar quotes walks through it. If a lender hid fees or misstated terms, file a complaint with the CFPB and your state attorney general.
Related red flags
Hidden Dealer Fees Behind "Low APR" Solar Loans
Low-rate solar loans are usually paid for by a dealer fee the lender charges the installer, which is added to your price. The CFPB says these fees typically run 10% to 30% of the cash price and sometimes exceed 50%.
The Month-18 Payment Jump (Reamortization)
The low payment is often calculated as if you will pay down about 30% of the loan early. If you don't, the loan re-amortizes and the payment can jump by 40% or more. Homeowners who buy in 2026 get no federal credit to make that paydown.
"Tier 1 Panels" With No Model Numbers
The BloombergNEF Tier 1 list ranks manufacturers by bankability for large financed projects. It is not a quality, reliability or warranty rating, and nearly every mainstream panel brand is on it. Without model numbers, you can't compare quotes or check warranties.
Inflated 25-Year "Lifetime Savings" Numbers
Lifetime savings headlines usually add up 25 years of future dollars as if they were worth the same as today's, assume you stay the whole time, and sometimes count tax credits or inflated rate increases as savings. The real value is usually much smaller and depends on what else you could do with the money.