Solar Cash Price vs. Financed Price: Find the Dealer Fee Before Comparing Rates

Start with the price of the same installed system

A low solar-loan rate does not tell you whether the equipment and installation have become more expensive. First obtain a written cash purchase price, then compare it with the purchase price attached to financing and the actual loan principal. The CFPB’s 2024 solar-financing report describes fees embedded in principal above the cash price.[1] This is a comparison of one installed system under different payment arrangements, not a mortgage-points calculation.

Freeze the equipment and installation scope

Request two dated proposals from the same installer for identical panel quantity and model, inverter, system capacity, warranties, installation work, permits and interconnection work. Keep batteries, roof repairs and electrical-panel upgrades either included in both or separately priced in both. List taxes and any other charges consistently. Otherwise, a higher financed quote could reflect more equipment rather than a financing-related markup.

The CFPB’s consumer advisory recommends asking for the cash price and a written breakdown of work, materials and their costs.[2] Keep the signed installation contract and loan agreement, not just a monthly-payment screenshot.

Reconcile principal before naming the difference

For your comparison worksheet, expected principal equals the matched cash purchase total, minus the cash down payment, plus documented financed charges and any financing-related price increase. This is a reconciliation tool, not a legal definition of a disclosure field. Ask the installer and lender to explain every difference in dollars.

The report describes a $30,000 cash project with a $9,000 embedded fee: principal becomes $39,000, the installer receives $30,000 and the lender retains $9,000.[1] Do not infer that allocation for your own offer without documentation. An unexplained gap is a question to resolve, not automatic proof that the installer pockets it.

Check the percentage’s denominator

Consider an entirely hypothetical matched system priced at $30,000 cash or $39,000 financed, with no down payment, extra work or separately paid fees. The increase is $9,000: 30% of the cash price, but approximately 23.08% of the loan principal. Neither percentage is an annual interest rate.

If someone instead means a fee equal to 30% of the gross loan, while the installer must receive $30,000, the arithmetic is $30,000 ÷ 0.70 = $42,857.14, not $39,000. Ask “30% of which amount?” before comparing two quoted fee percentages. These illustrations are not current market prices or fee benchmarks.

Model both the term and an early exit

Extend the hypothetical with two fully amortizing, fixed-rate loans: offer A finances $39,000 at a nominal annual interest rate of 2.99%; offer B finances the $30,000 cash price at 6.99%. Both run 240 months, with end-of-month payments, monthly interest, no additional fees, no payment resets and no prepayment penalty. These are invented rates, not available offers or regulatory APR calculations.

Monthly payment equals principal × monthly rate ÷ [1 − (1 + monthly rate)⁻²⁴⁰]. A costs about $216.10 monthly and $51,863.49 over the full term; B costs $232.41 and $55,778.31. A is cheaper if paid exactly as modeled for twenty years. Totals use unrounded payments; actual schedules may adjust the final payment.

But immediately after payment 60, A still owes $31,313.96 and B owes $25,873.05. Payments already made plus immediate payoff total $44,279.83 for A versus $39,817.63 for B. B is cheaper on that five-year path. The illustration excludes daily payoff interest and other settlement charges. Request actual dated payoff figures rather than assuming a lower monthly payment wins at every horizon.

A low rate does not erase embedded principal

The CFPB advisory says dealer fees can increase the loan amount while making the interest rate appear artificially low.[2] Compare the cash-price baseline, starting principal, disclosed rate and APR, payment schedule, and dollars paid through your intended exit. Do not relabel the cash-price difference as mortgage discount points or invent a corrected APR without the actual contract cash flows.

If you plan to refinance or repay early, ask whether any embedded charge is refundable. Our example assumes it remains in principal. Interest avoided by early repayment does not itself reverse an already financed price increase.

Demand an affordable no-benefit payment schedule

The 2024 report describes loans whose required payment increases unless a substantial partial prepayment is made.[1] Ask for the schedule with no optional lump-sum payment, its trigger dates, and every required dollar amount. Do not assume the illustration above fits such a contract.

No tax credit, rebate or electricity saving funds our example. Verify any claimed incentive with the responsible official authority for the applicable year and your circumstances. This article does not determine current tax eligibility or guarantee lower utility bills.

Use a signing decision, not a rate contest

Pause if the installer will not supply a comparable cash price or explain the principal. Obtain an outside financing proposal and compare multiple installers and lenders, as the CFPB advisory recommends.[2] Choose only after the matched scope, principal reconciliation, full-term cost and planned-exit cost are clear and affordable.

Sources were checked September 22, 2026. Both are CFPB publications dated August 7, 2024; the advisory is now marked archived. They support the pricing mechanism, not current rates, market prevalence or current tax law. This guide covers purchased residential systems, not solar leases or power-purchase agreements.