If you financed solar a few years ago, there is a good chance you remember the monthly payment and the unusually low interest rate. Maybe it was 3.99%. Maybe 2.99%. Maybe even lower. What you may not remember is being told how much that low rate could affect the amount you actually financed.
A 2023 Mosaic solar financing rate sheet reviewed for this article shows a 34.75% dealer fee attached to one 25-year 3.99% APR product. At the other end of the same rate sheet, a 10.99% APR option shows a 0% dealer fee.
That does not automatically mean anything improper happened in your transaction. Dealer fees are a financing mechanism, and homeowners may have received disclosures elsewhere in their contracts or loan documents. But the numbers raise an important question for anyone with an unexpectedly large solar loan:
What did you actually pay to get that low interest rate?
What the 2023 Solar Financing Rate Sheet Shows
The 25-year financing options shown on the Mosaic rate sheet include the following combinations:
- 3.99% APR with a 34.75% dealer fee
- 4.99% APR with a 29.85% dealer fee
- 5.99% APR with a 25.55% dealer fee
- 7.99% APR with a 15.25% dealer fee
- 8.59% APR with a 12.75% dealer fee
- 9.59% APR with a 7.75% dealer fee
- 9.99% APR with a 5.25% dealer fee
- 10.99% APR with a 0% dealer fee
The pattern is hard to miss. On this particular rate sheet, the lower the interest rate goes, the higher the listed dealer fee becomes.
The document also contains this statement:
“CONTRACTOR / INSTALLER USE ONLY — NOT INTENDED FOR DISTRIBUTION TO HOMEOWNERS”
That statement by itself does not establish that a homeowner was misled or that required information was withheld. But it does highlight the difference between what an installer could see when selecting financing products and what a homeowner may have understood during the sales presentation.
The contractor could see that a 3.99% product carried a substantially different fee structure than a 10.99% product.
Did the homeowner understand that difference too?
What Is a Solar Dealer Fee?
A dealer fee is a cost associated with certain solar financing programs. Depending on the lender and program, the fee may be incorporated into the economics of the transaction rather than presented to the homeowner as a separate line item with the same terminology used on an installer rate sheet.
The Consumer Financial Protection Bureau’s solar financing report found that some solar-specific lenders used dealer fees and other markups that could increase loan principal substantially above a system’s cash price.
The exact calculation and terminology can vary by financing program. That is why homeowners should not assume that every difference between cash price and financed price represents the same kind of fee. The important goal is to understand how your own transaction was structured.
Solar financing can involve loan pricing, dealer fees, interest, tax-credit assumptions, and other contract terms. This article provides general educational information, not legal, tax, credit, or financial advice. Review your actual agreements and speak with qualified professionals when needed.
Why a 34.75% Dealer Fee Can Be Bigger Than It Sounds
One of the most confusing parts of the rate sheet reviewed for this article is how the dealer-fee percentage relates to the total financed transaction.
Using the structure reflected in that source, imagine the underlying solar project needs to generate $40,000 for the contractor.
If the financing product has a 40% dealer fee, it would be easy to assume the calculation looks like this:
- 40% of $40,000 = $16,000
- $40,000 + $16,000 = $56,000
But under the financing structure illustrated in the source material, that is not the calculation. If 40% of the total financed amount represents the dealer fee, only 60% remains for the project itself.
To leave $40,000 for the project:
- $40,000 divided by 0.60 = approximately $66,667 financed
- Project amount = $40,000
- Financed amount = approximately $66,667
- Difference = approximately $26,667
That example is illustrative. Dealer-fee structures can vary by lender and financing product, so homeowners should use their own documents rather than applying this formula automatically to every solar loan.
What Different Dealer Fees Could Do to a $40,000 Project
Using the same illustrative structure, here is how the financed amount changes as the dealer-fee percentage increases:
- 10% dealer fee: approximately $44,444 financed
- 15% dealer fee: approximately $47,059 financed
- 20% dealer fee: approximately $50,000 financed
- 25% dealer fee: approximately $53,333 financed
- 30% dealer fee: approximately $57,143 financed
- 35% dealer fee: approximately $61,538 financed
- 40% dealer fee: approximately $66,667 financed
The important point is not that every solar loan works this way. It is that the percentage shown on a contractor financing sheet may translate into a much larger dollar difference than a homeowner expects.
And that difference exists before interest is paid over the life of the loan.
Now Apply the Actual 34.75% Number
The 2023 Mosaic rate sheet reviewed for this article lists a 34.75% dealer fee for its 25-year 3.99% APR option.
Using the same $40,000 project example:
- Project amount needed: $40,000
- Dealer fee: 34.75%
- Remaining project percentage: 65.25%
- $40,000 divided by 0.6525 = approximately $61,303
That produces an illustrative difference of approximately $21,303 between the $40,000 project amount and the total amount financed.
Again, this is an example based on the fee structure represented in the rate sheet. It is not a calculation of what every Mosaic customer paid, and it does not prove that any individual homeowner’s entire price difference was a dealer fee.
Solar projects can include other legitimate costs, including batteries, roofing, electrical-panel work, trenching, structural work, and other equipment or upgrades.
But if your original financed amount was much larger than the solar project price you remember discussing, the difference is worth understanding.
The Real Question Is Not Just 3.99% Versus 10.99%
Presented by itself, the choice seems obvious.
Would you rather borrow at 3.99% or 10.99%?
Most people would choose 3.99%.
But if the two financing options also involve different amounts financed, the decision becomes more complicated.
The better comparison may be:
- How much am I borrowing?
- What interest rate applies?
- What will my monthly payment be?
- What is the total of all scheduled payments?
- How quickly will the principal balance decline?
- What happens if I pay the loan off early?
- What happens if I sell or refinance the home?
A low interest rate does not automatically mean the cheapest financing arrangement if obtaining that rate substantially changes the amount being financed.
Imagine Buying a Car This Way
Suppose you walked into a dealership to buy a $40,000 truck and were given two financing choices.
- Option one: finance approximately $40,000 at a higher interest rate
- Option two: finance approximately $61,000 at 3.99%
You probably would not decide based only on the interest-rate number.
You would want to know why the amount financed increased by roughly $21,000.
That same question matters with solar.
Solar Was Often Sold on Monthly Payment, Not Total Price
Think back to the solar sales presentation.
Did the salesperson spend more time discussing the full purchase price or your monthly electric bill?
A common sales comparison might have looked like this:
- Current utility bill: $250 per month
- Proposed solar payment: $220 per month
That can sound simple. You are paying $250 now, and solar supposedly brings that down to $220.
But comparing monthly payments is different from comparing total transaction prices.
A homeowner focused on $250 versus $220 may never realize there was another comparison worth making:
- What would this system cost in cash?
- How much am I actually financing?
If your payment later became part of the problem, review why a solar payment may increase over time and the broader information on solar payment issues.
Why the Dealer Fee Can Matter When You Sell the House
Dealer fees may become especially noticeable when a homeowner sells or refinances before the solar loan is paid off.
Imagine making payments for several years, requesting a payoff statement, and discovering that the remaining balance is much higher than you expected.
That is often when homeowners begin pulling out the original paperwork and asking:
- What was the original system price?
- How much did I finance?
- How much principal have I actually paid down?
- Why is my payoff still this high?
If solar financing is complicating a sale, the guide on selling a home with solar contract problems explains several other issues worth reviewing.
A Low Rate Can Still Be Part of an Expensive Loan
Consider two hypothetical loans:
Loan A
- $40,000 financed
- Higher interest rate
Loan B
- Approximately $61,303 financed
- 3.99% interest rate
Which one costs less?
You cannot answer that question from the interest rate alone.
You would also need to know the loan term, monthly payment, total payments, payoff timing, and how long you expect to keep the loan.
That is why an unusually low APR should be reviewed together with the amount financed, not in isolation.
What If the Solar Company Is Gone but the Loan Is Still There?
Some homeowners reviewing old financing documents are doing so because their installer is no longer operating.
The company that sold or installed the system may have closed or filed bankruptcy, while the lender or servicer continues sending monthly statements.
Those are separate issues. An installer closure does not automatically cancel a financing obligation.
If that is part of your situation, review what happens when a solar company goes out of business and what to check if a solar lender or loan servicer has financial problems.
The Solar Equipment May Not Be the Problem
It is important to separate the solar technology from the financing.
A homeowner can have:
- Quality solar panels
- A functioning inverter
- A properly designed system
- Normal energy production
and still have serious concerns about how the project was priced or financed.
The questions are different:
- How much did the project cost?
- How much did you finance?
- What financing choices were presented?
- What were you told about the low interest rate?
- Did the sales explanation match the documents you signed?
Why the Contractor-Only Rate Sheet Language Matters
The rate sheet used for this article says it was intended for contractor or installer use and was not intended for distribution to homeowners.
Again, that does not prove wrongdoing.
But the installer using that sheet could see the relationship between the listed rate and the dealer fee:
- 3.99% APR: 34.75% dealer fee
- 4.99% APR: 29.85% dealer fee
- 5.99% APR: 25.55% dealer fee
- 10.99% APR: 0% dealer fee
That makes several questions worth asking when reviewing an older solar deal:
- Were you shown the cash price?
- Were you shown higher-rate financing alternatives?
- Did anyone explain why a lower rate affected the financed amount?
- Were you told how much you were borrowing compared with the underlying project price?
- Did anyone explain what an early payoff might look like?
Are Solar Dealer Fees Illegal?
Not automatically.
Financing costs associated with obtaining a lower interest rate are not unique to solar. Other lending products may also involve costs tied to rate selection.
The more useful homeowner question is not simply whether a fee existed.
It is whether you understood the total transaction.
There is a meaningful difference between understanding:
“This project costs one amount, but choosing this financing option materially increases the amount being financed.”
and hearing only:
“You qualified for 3.99%.”
If you believe the sales presentation did not match the financing documents, review common bad solar contract red flags homeowners should check.
How to Check Whether Dealer Fees May Have Affected Your Loan
Start with your paperwork.
Gather:
- Your original solar proposal
- Your installation or purchase agreement
- Your loan agreement
- Your original financing disclosures
- Your current loan statement
- Your current payoff statement, if available
Then write down:
- The cash price, if one was provided
- The amount financed
- Your APR
- Your loan term
- Your original monthly payment
- Your current payment
- Your current payoff balance
Compare the cash price with the amount financed.
If there is a large difference, do not automatically assume all of it represents a dealer fee. Your project may have included batteries, roofing, electrical work, panel upgrades, trenching, or other legitimate project costs.
The goal is to identify what each part of the financed amount paid for.
If You Are Shopping for Solar Today, Ask for Two Numbers
Before focusing on the monthly payment or interest rate, ask:
- What is the cash price?
- What is the financed price?
Then ask why they are different.
Understanding those numbers can make it much easier to evaluate a low-rate financing offer in context.
Review the Financing, Not Just the Interest Rate
If you have a low-rate solar loan but the original financed amount or current payoff balance seems unusually high, DitchYourSolar can help you take the first step. Review the proposal, loan agreement, payment history, and available pricing information together so you can better understand what may be worth reviewing next.
Review Your Solar Loan and Payment Issues
The question is not simply, “What interest rate did I get?” For some homeowners, the more important question may be, “What did I pay to get that interest rate?”