Solar Installation Financing Companies: How to Compare Loans, Leases, and PPAs
A residential solar system often costs between $15,000 and $30,000 before incentives. Most homeowners do not write a check for that amount, which is why solar installation financing companies exist. These lenders, lease providers, and third-party ownership firms put panels on your roof for a monthly payment instead of a lump-sum bill. Choosing the right one changes how much you pay over the life of the system, whether you can claim the federal tax credit, and how easily you can sell your house later.
This guide breaks down what these companies actually offer, what the financing costs in real numbers, and how to compare offers without getting talked into a bad deal.
What Solar Installation Financing Companies Actually Do
Solar installation financing companies fall into three broad buckets. Each one solves a different problem, and each one costs you money in a different way.
Direct solar lenders originate loans specifically for home solar projects. Names like GoodLeap, Mosaic, Dividend Finance, and Sunlight Financial partner with installers to offer same-day approval and promotional rates, often around 3.99% to 9.99% APR depending on your credit and the loan term.
Banks and credit unions write loans too, but through products you already know: personal loans, home equity loans, and home equity lines of credit (HELOCs). Rates here can be lower than dealer-arranged financing if you have strong credit, but approval takes longer and requires equity.
Third-party ownership companies do not lend money at all. They install, own, and maintain the system on your roof and sell you the power it produces through a lease or a power purchase agreement (PPA). Companies like Sunrun, Sunnova, and Tesla (through its Solar program) dominate this side of the market.
The key difference is ownership. With a loan, you own the panels and keep every incentive. With a lease or PPA, the financing company owns the panels and collects the tax credit, the SRECs (solar renewable energy credits), and any other incentives.
The Main Ways to Pay for Solar
Every “solar installer near you” quote eventually comes down to one of four payment structures. Here is how they compare side by side.
| Factor | Cash Purchase | Solar Loan | Solar Lease | PPA |
|---|---|---|---|---|
| Upfront cost | Full price, $15k–$30k | $0 down typical | $0 down typical | $0 down typical |
| Tax credit goes to | You | You | The owner | The owner |
| Typical cost per watt | $2.50–$3.50 | $3.00–$4.50 | $3.00–$4.00 equivalent | $3.00–$4.00 equivalent |
| Long-term savings (25 yr) | Highest | High | Moderate | Moderate |
| Maintenance responsibility | You | You | The owner | The owner |
| Impact on home sale | Usually raises value | Transferable loan | Must transfer or buy out | Must transfer or buy out |
Cash delivers the highest return and the simplest paperwork, but it ties up a lot of money. A solar loan keeps you eligible for the 30% federal tax credit while spreading the cost over 10 to 25 years. A lease or PPA requires no credit-heavy loan and no maintenance headaches, but you give up the tax credit and typically save less over the long run.
Types of Solar Loans, Explained
Not all solar loans are created equal, and the type you qualify for changes your rate dramatically.
Secured solar loans and home equity products
A HELOC or home equity loan uses your house as collateral. Because the lender has an asset to seize if you default, rates run lower, often 6% to 9% as of the mid-2020s. The interest is generally tax-deductible if the funds go toward a capital improvement like solar, though you should confirm with a tax professional. The catch is you need enough equity built up, and a second lien can slow down a future refinance or sale.
Unsecured solar loans
Dealer-arranged solar loans from companies like GoodLeap and Mosaic are unsecured, meaning no collateral. Approval is fast, sometimes within minutes at the kitchen table, and requires only a soft credit pull for a pre-approval. The trade-off is the rate: promotional terms often stretch to 25 years and advertised low rates like 3.99% usually assume you re-amortize by applying your tax credit within 18 months. If you skip that “re-amortization” step, your payment jumps.
PACE financing
Property Assessed Clean Energy (PACE) programs let you repay solar through a special assessment on your property tax bill. There is no minimum credit score requirement in many cases, and the payment runs 10 to 25 years. The risk is that PACE liens attach to the property itself, which can complicate selling or refinancing. It is available in parts of California, Florida, Missouri, and a few other states, but not everywhere.
How to Compare Solar Installation Financing Companies
Most homeowners receive one financing option from one installer and never see a competing quote. That single point of comparison is where money gets lost. When you evaluate solar panel cost and installation cost line items, ask every lender the same five questions:
- What is the total interest paid over the full term? A low monthly payment on a 25-year loan can hide thousands in lifetime interest. Ask for the complete amortization schedule.
- Is the quoted rate contingent on a tax-credit re-amortization? If yes, what does the payment become if you do not apply the credit within the stated window?
- What origination or dealer fees are baked into the rate? Many “3.99%” solar loans carry a 15% to 30% dealer fee. You are financing the fee without ever seeing it on paper.
- Who holds the loan after closing? Solar loans are frequently sold. It matters less than the rate, but a lender with a poor servicing reputation can make payoff and transfer painful.
- What happens if I sell my house? A transferable loan is fine. A lease or PPA often requires the buyer to qualify or you to prepay the remaining contract, and that has sunk more than one real estate closing.
What Solar Financing Actually Costs
Understanding the true cost matters more than the payment. Here is a realistic example for a 7 kW system priced at $20,000 in a state with average sun.
A 20-year solar loan at 6.99% APR with zero down carries a monthly payment near $155 and total interest around $7,200, bringing the all-in cost to roughly $27,200 before the tax credit. Apply the 30% federal tax credit to the principal and the numbers improve, but only if you actually re-amortize. If you need the monthly budget math, our breakdown of how much it costs to finance solar panels walks through the trade-offs in detail.
A lease from a major third-party owner might quote $110 to $140 a month with a 2.9% annual escalator. Over 25 years that payment climbs, and you save somewhere between 15% and 25% on electricity rather than eliminating the bill entirely. You will likely still pay something to the utility every month.
Federal and local incentives shift all of these numbers. The residential clean energy credit is worth 30% of the system cost through 2032, and many states add rebates on top. Before you finance any amount, check what the solar rebate is worth in your area, because financing the gross price instead of the post-incentive price is one of the most common homeowner mistakes.
Red Flags to Watch For
Solar financing is a heavily commissioned industry, and pressure tactics are common. Walk away from any company that does the following:
- Refuses to give you a cash price. If they will only quote a “monthly payment,” you cannot see the fees buried in the loan.
- Pushes a 25-year lease hard. Long leases with escalators are frequently the most profitable product for the seller and the worst deal for the buyer.
- Claims the panels are “free” thanks to government programs. There is no free solar. Someone pays, and it is usually you.
- Rushes a same-day contract. Legitimate financing documents deserve a night of review, especially the amortization schedule.
- Won’t show the dealer fee. Ask point blank: “What dealer fee is in this loan?” If the answer is vague, get another quote.
For current benchmarks and deeper how-to detail, the team at Energy.gov keeps regularly updated reference guides worth bookmarking.
Frequently Asked Questions
Which is better, a solar loan or a solar lease?
A solar loan is usually the better deal if you have decent credit and can use the 30% federal tax credit. You own the system, raise your home’s value, and keep long-term savings. A lease works when you cannot use the tax credit or simply want someone else to handle maintenance.
What credit score do I need for solar financing?
For an unsecured solar loan, most lenders want a score in the mid-600s or higher for competitive rates. PACE programs are far more lenient and often have no minimum. A secured HELOC depends on your equity as much as your score.
Do solar installation financing companies charge dealer fees?
Many do. Dealer-arranged loans frequently include a 15% to 30% origination or dealer fee that raises your principal behind the advertised rate. Always compare the total financed amount against the cash price to spot it.
Can I get the solar tax credit with a lease or PPA?
No. The 30% residential clean energy credit goes to the owner of the system. With a lease or PPA, the financing company claims it. With a cash purchase or loan, you claim it.
Does solar financing hurt my chances of selling my home?
A transferable solar loan usually does not. A lease or PPA can, because the buyer must either assume the contract or you must buy it out, and short contract terms scare off some buyers.
The Bottom Line
Solar installation financing companies are not interchangeable, and the cheapest monthly payment is rarely the best deal. Get at least two quotes, ask for the cash price and the full amortization schedule, and run the numbers as a total-cost decision rather than a payment decision. If you can claim the federal tax credit, a competitive loan through a reputable lender will almost always beat a lease. For most homeowners, that means comparing a lender like a local credit union against a dealer-arranged loan like GoodLeap or Mosaic, then checking the fine print for dealer fees before you sign.
Take your time. A solar system produces power for 25 years or more, and the financing decision you make today will be with you for most of that time.
