Solar Loan Dealer Fees: The Hidden 10-30% in Low-APR Loans
Most solar loans advertised at 0.99% to 3.99% APR aren’t really that cheap. The lender charges the installer a “dealer fee” to buy down the rate, and the installer adds that fee to your price. The Consumer Financial Protection Bureau found these fees typically run 10% to 30% of the cash price, and sometimes more than 50%. You won’t see the fee on the loan papers as a fee. You find it by asking for the cash price.
How a dealer fee works
- The installer quotes you a system and offers a loan at a low rate, say 3.99% for 20 years.
- The lender agrees to that rate only if the installer pays it a fee, often a percentage of the loan amount.
- The installer raises the system price so it still nets what it wanted. That higher price becomes your loan amount.
- You pay interest on the fee for the life of the loan.
The CFPB’s example: a $30,000 system with a $9,000 fee becomes a $39,000 loan. Because the fee is folded into the price, it typically doesn’t show up in the advertised APR.
Lawrence Berkeley National Laboratory’s data shows the effect at scale. In 2025, the median installed price was $3.00 per watt for cash purchases and $4.50 per watt for loan-financed systems, according to LBNL. That’s about 50% higher for loans. Not all of that gap is fees, but much of it is consistent with them.
What regulators have found
- CFPB (August 2024): Dealer fees typically 10% to 30% of the cash price, sometimes over 50%. Advertised APRs typically 1% to 7% and leave the fee out. Loans often run 8 to 25 years but are usually repaid in 7 to 9.
- Minnesota attorney general (March 2024): Sued solar lenders GoodLeap, Sunlight, Mosaic and Dividend, alleging about $35 million in hidden dealer fees on about 5,000 loans, with fees raising costs 15% to 30%. As of October 2026 we haven’t confirmed how the case was resolved. Minnesota AG announcement.
- Lender failures: Mosaic filed for bankruptcy in 2025. Borrowers’ terms didn’t change, and servicing moved to Solar Servicing LLC, a Forbright Bank subsidiary. Your loan doesn’t go away when a lender fails.
A worked example: back-solving the fee
Say a salesperson offers this:
- 8 kW system
- “Just $194 a month”
- Loan amount $32,000 at 3.99% APR for 20 years
Step 1: Ask for the cash price. The installer says $24,000.
- Dealer fee = $32,000 − $24,000 = $8,000
- That’s 25% of the loan amount, or 33% on top of the cash price
- Price per watt: $4.00 financed vs. $3.00 cash. Compare with what a good price per watt is.
Step 2: If they won’t give you a cash price, back-solve it. Take the monthly payment and ask: what would that payment buy with a normal, no-fee loan? At 8% for 20 years, $194 a month pays off about $23,200. So the extra $8,800 in the quoted loan amount is roughly what the low rate is costing you. The dealer fee calculator does this for you.
Step 3: Find the true APR. The true APR is the interest rate on what you actually received (a $24,000 system) given what you actually pay ($194 a month).
| If you pay the loan off after | True APR |
|---|---|
| 20 years (full term) | about 7.5% |
| 9 years | about 8.7% |
| 7 years | about 9.5% |
| 5 years | about 11.1% |
Two honest takeaways:
- If you keep the loan all 20 years, this “3.99%” loan costs about the same as a 7.5% no-fee loan. That’s in the range of a HELOC (about 7.3% as of October 2026) or a good-credit personal loan (often 6% to 10%). Not a disaster, but not the deal it looks like.
- If you sell, refinance or pay it off early, the fee hurts much more, because you repay the full $8,000 no matter when you leave. Since the CFPB found most solar loans are repaid in 7 to 9 years, the higher true APRs are the more realistic ones for many people.
The tax credit prepayment trap
Many solar loans were built around the 30% federal credit. The payment was set low on the assumption you’d pay down about 30% of the balance around month 18 using your tax refund. If you didn’t, the payment jumped.
For systems installed after December 31, 2025, homeowners get no federal credit. Any 2026 loan quote that shows a low payment “after your tax credit” is wrong. Ask for the payment with no prepayment at all. See the red flags on reamortization balloons and quotes that still claim the 30% credit, and our guide to the federal solar tax credit in 2026.
Watch out: A quote that shows only a monthly payment, with no total price, no price per watt and no cash price, is hiding something. See the red flag on monthly-payment-only quotes.
How to get the real cash price
- Ask in writing: “What is the cash price for this exact system, same equipment, if I pay with my own funds?”
- Ask the lender: “What dealer fee or platform fee is the installer paying on this loan?”
- Ask for a menu. Many installers can offer several rate-and-fee pairs from the same lender, for example 3.99% with a high fee or 7.99% with little or none.
- Get competing quotes. Get at least three, including one from a local installer that isn’t selling door to door. See how to compare solar quotes and use compare quotes.
- Compare price per watt to local cash prices. See solar panel cost and your state page under /solar/.
If the installer’s cash price is itself inflated, a low-APR loan can hide that too. A cash price far above $3.00 to $3.50 per watt for an ordinary system deserves a second look.
Alternatives to dealer-fee loans
| Option | Typical rate (as of October 2026) | Pros | Cons |
|---|---|---|---|
| Cash or savings | Your lost interest | No fees, lowest total cost | Ties up money |
| HELOC | About 7.3% average, variable | No dealer fee, interest may be tax-deductible (ask a tax pro) | Your home is collateral, rate can rise |
| Home equity loan | About 8.7% (10-year) | Fixed rate, no dealer fee | Home is collateral, closing costs possible |
| Credit union or bank “green” or personal loan | Often 6% to 10% with good credit | No dealer fee, often unsecured | Higher rate, shorter terms |
| Dealer-fee solar loan | 1% to 7% advertised | Easy, offered at the table | Fee of 10% to 30% or more |
| Lease or PPA | n/a | No upfront cost, provider may pass on its tax credit | You don’t own it, escalators, sale hassles |
Home equity rates are national averages from Bankrate as of October 14, 2026. Your rate will depend on your credit and lender.
A lease or PPA can sometimes beat a dealer-fee loan. See lease vs. buy vs. PPA vs. loan and solar financing options.
Questions to ask about any solar loan
- What is the cash price, and what is the loan amount?
- Is there a dealer fee, and how much is it in dollars?
- What is the payment if I never make a lump-sum prepayment?
- Is there a prepayment penalty?
- Is the loan secured by a UCC-1 filing on the equipment? Does it have to be paid off when I sell? See selling a house with solar.
- When does the first payment start: at signing, installation, or permission to operate? Payments before the system can run are a red flag. See payments before PTO.
Bottom line: A dealer fee isn’t always a dealbreaker if you’ll keep the loan to the end. But you can’t judge it unless you know it exists. Get the cash price first, then compare the dealer-fee loan to a HELOC or a no-fee credit union loan using the solar loan calculator.
If you think a fee was hidden from you, you can submit a complaint to the CFPB and your state attorney general. See the red flag on hidden dealer fees for more.
Common questions
What is a dealer fee on a solar loan?
It's a charge the lender takes from the installer in exchange for offering you a below-market interest rate. The installer raises your price to cover it, so you pay it through a bigger loan balance, even though it isn't shown as a fee or included in the advertised APR.
Are solar dealer fees legal?
Dealer fees themselves are a common lending practice, but hiding them or misrepresenting the cost can violate consumer protection law. Minnesota's attorney general sued four solar lenders in 2024 over hidden fees, and the CFPB has warned about the practice.
How do I find out if my solar loan has a dealer fee?
Ask the installer for the cash price of the same system in writing and compare it to the loan amount. You can also ask the lender directly, or divide the loan amount by the system size and compare that price per watt with local cash prices.
Can I negotiate a solar dealer fee?
You usually can't negotiate the fee itself, but you can avoid it by paying cash, bringing your own financing, or choosing a higher-rate loan from the same installer that carries a lower fee. Some installers offer several rate-and-fee combinations if you ask.
Does paying off a solar loan early get the dealer fee back?
No. The fee was built into your loan balance on day one, so you repay it in full even if you pay off the loan in a year. That's why dealer-fee loans are especially expensive if you sell or refinance early.
Spotted an error or outdated number? Email hello@unbiasedsolar.com and we'll fix it. No installer or lender paid for or reviewed this guide.