Is This Your Problem?
Solar loans advertised at low interest rates often hide 15% to 30%+ dealer fees added to the total financed system price.
Get Matched With a Local ProA dealer fee is the reason a solar loan can advertise a rate below four percent while costing more than a plain bank loan at a higher rate. It is a charge the lender pays itself through the dealer, built into the principal you borrow, and repaid by you with interest. The advertised rate is the visible half of the transaction. The dealer fee is the other half, and it does not appear as a fee line on the proposal. On the source range for residential solar lending, that hidden charge runs from 15% to more than 30% of the system price.
How the Fee Works
The mechanism is rate buy-down. A lender offers the installer a menu of rate and fee combinations for the same customer and the same array. A low rate on the menu carries a high fee; a plain rate carries little or none. The installer chooses the combination that closes the sale, then adds the fee to the system price so the quotation still reads as one number: a system price, a monthly payment and a comfortable interest rate. The homeowner sees a rate they like and a payment they can afford, and never sees the fee, because there is no fee line to look at.
The federal consumer financial regulator looked at this directly. In an August 2024 issue spotlight on solar financing, the Consumer Financial Protection Bureau found that hidden dealer fees folded into solar loans can raise the principal 30 percent or more above the cash price, a markup most borrowers never see because it is not disclosed as one. The same publication warned that sales pitches routinely subtract the federal tax credit from the quoted cost as though every household receives it, when the credit depends on the household's own tax position. The CFPB has also brought enforcement actions against solar lenders over applications that installers falsified, including inflated borrower income.
The structural consequence is that two quotes for the identical array can differ by thousands of dollars without either looking wrong. One installer quotes a low rate with a large fee and a headline number that matches the competitor's. The other quotes a higher rate with no fee. The monthly payments can land within a few dollars of each other while the total amounts financed differ by the size of the fee, and the homeowner has no way to see which is which until they compare the amount financed rather than the rate.
| Dealer fee | Added to the financed price | Financed gross price | What it equals on this system |
|---|---|---|---|
| None (cash-price financing) | $0 | $20,480 | The array at the published turnkey model price |
| 15% (low end of the source range) | $3,072 | $23,552 | $0.38 per watt, or a second inverter-and-racking allowance on top of the system you are buying |
| 20% | $4,096 | $24,576 | Exactly the soft-cost bucket in this site's own itemised quote: $4,096, or $0.51 per watt |
| 25% | $5,120 | $25,600 | $0.64 per watt added to the price of the same hardware |
| 30%+ (top of the source range) | $6,144 | $26,624 | Exactly the entire module line in the same itemised quote: $6,144, or $0.77 per watt |
Basis: the 8 kW, $20,480 gross turnkey model used across this site, with its published cost buckets of modules $6,144, balance-of-system hardware $5,530, soft costs $4,096, labour $3,482 and inverters $1,229. A 20% dealer fee costs the same as the entire soft-cost bucket; a 30% fee costs the same as the panels themselves.
What It Costs You in Borrowed Money
A fee inside the principal is not a one-time cost, because you pay interest on it for the life of the loan. Take the model this site uses elsewhere for solar financing: an 8 kW array with the tax credit applied to the principal at signing, financed at 6.5% APR over 12 years. With no dealer fee, the borrower finances $14,336. Add a 15% dealer fee and the amount financed rises to $17,408 for the same equipment. Add 30% and it rises to $20,480, which is the gross price of the array all over again, now repaid with interest.
| Case | Amount financed | Monthly payment | Total interest | Total paid |
|---|---|---|---|---|
| No dealer fee (cash price financed) | $14,336 | $144 | $6,348 | $20,684 |
| 15% dealer fee added | $17,408 | $174 | $7,708 | $25,116 |
| 30% dealer fee added | $20,480 | $205 | $9,068 | $29,548 |
Computed at 6.5% APR over 144 monthly payments, rounded to the nearest dollar. The 15% fee adds $4,432 to what you repay: $3,072 of fee plus about $1,360 of interest charged on the fee itself. The 30% fee adds $8,864: $6,144 of fee plus about $2,720 of interest on it. Neither figure appears anywhere on a proposal that quotes only a rate and a monthly payment.
Run the comparison the other way and the same arithmetic reproduces itself. A household told that the dealer fee does not matter because the rate is low is being offered a lower rate on a larger balance. The single number that settles the question is the total of payments on the lender's own disclosure, which is the sum of every payment you will make, fee and interest included. It is a required disclosure line. Ask for it, and ask for it for both offers, and the fee stops being hidden.
There is a second, quieter cost. A financed price that is 30% above the cash price distorts every comparison you make afterwards. If you later want to pay the loan off early, the fee has already been borrowed and is already owed, so early repayment does not remove it. If you sell the house, the payoff figure includes it. If you took the loan instead of a lease because you wanted to own the asset, you still own it, but you own it with a larger debt attached than the hardware justified.
Where to Find the Fee in Your Documents
The fee is discoverable, and it is discoverable in one specific place: the difference between the price on the sales proposal and the amount financed on the lender's truth-in-lending disclosure. Federal disclosure rules require the lender to present the amount financed, the finance charge and the annual percentage rate together in one clearly labelled box. When a dealer fee sits inside the principal and is never shown as a finance charge, that box is where the two documents stop agreeing with each other.
- Compare the system price on the proposal against the amount financed on the lender's disclosure. If the second is larger, the difference is the fee, whatever it is called.
- Read the APR, not the rate. A headline rate of 2% with an APR in the high single digits means charges are inside the loan. The APR is designed to capture exactly this.
- Look for a prepaid finance charge or a dealer participation line. Zero is a clean loan.
- Check the total of payments. It is the only line that contains the fee and the interest at once.
- Ask which lender the loan is with, and whether the installer is acting as that lender's broker. A borrower can decline a brokered loan and bring their own financing.
- Ask what the same system costs as a cash purchase. A cash price that is thousands below the financed price, with no explanation, is the fee talking.
| Document | Line to read | A clean version reads |
|---|---|---|
| Sales proposal | System price, and cost per watt | One gross price, matching what the salesperson said, around the published $2.56 per watt on an 8 kW array |
| Lender disclosure | Amount financed against the cash price | Equal to the system price, or a difference that is named and explained in writing |
| Lender disclosure | Prepaid finance charge, dealer participation | Zero, or disclosed as a finance charge rather than buried in principal |
| Lender disclosure | APR against the advertised interest rate | Close together. A wide gap between the two is the signature of a bought-down rate |
| Payment schedule | Total of payments | Close to the system price plus ordinary interest at the quoted rate |
| Loan documents | Identity of the lender | A named lender you can call directly, separate from the company selling the panels |
| Sales agreement | Payment terms on an early payoff | A payoff figure that reduces interest, not one that carries the fee regardless of timing |
The Questions to Ask Before You Sign
Six questions, asked of every company you invite to quote, will surface the fee in any loan-based offer. Ask them in writing, because the answers are documents rather than opinions, and because a company that will not put a financed price in an email is telling you what the answer would look like.
- What is the cash price of this system, and what is the price if I finance it through you?
- What is the total amount financed, and does it match the system price on your proposal?
- What is the APR, what is the total of payments, and is there a dealer fee inside the loan?
- Which lender is this, and what rate and fee menu did you choose from?
- What does this system cost with financing I arrange myself?
- Please send the lender's disclosure before I sign, not at signing.
Then compare offers using one number. Not the rate, not the monthly payment: the total of payments. Two Flagstaff quotes for the same 8 kW array can present a comfortable rate and a comfortable payment while differing by thousands of dollars in what you repay, and the total of payments is the line that makes the difference visible. If a company calls the fee normal, it may well be, but normal is not the same as disclosed, and a fee you were told about in advance is a price you can negotiate or decline.
How to Get a Loan-Priced Quote You Can Compare
A fair starting point in Flagstaff is $2.56 per watt on an 8 kW system, $20,480 gross, with modules at 30% of the price and every other bucket itemised. Ask each company for the cash price and the financed price on the same sheet of paper, and hold them against that benchmark. Our matching service arranges up to three quotes from pre-vetted Flagstaff installers, each checked for Arizona licensing, insurance coverage and customer references, free of cost and with no obligation. You compare them on your own schedule. Call (928) 698-6192 or use the form. If you already have a financed quote in hand, the planning checklist on this site lists the same document checks in order, and the financing comparison guide here breaks down what ownership does and does not give you.
Services That Fix This
Residential Solar Installation
Cash-price and financed-price quotes you can compare.
Solar Battery Storage
Storage quoted separately from the array.
Off-Grid Solar Systems
Remote systems, itemised the same way.