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Solar panel financing lets you go solar with little or no money upfront, spreading the cost over months or years while your system generates electricity from day one. The right financing option can save you tens of thousands of dollars over the life of your system. The wrong one, thanks to hidden dealer fees and unfavorable terms, can wipe out most of that savings before you even switch your system on.

This guide covers everything you need to know: the difference between solar loans and leases, how dealer fees work (and why they matter more than the interest rate), what the Tesla solar loan actually offers, and how to use our calculator to estimate your monthly payments. If you’re comparing options before calling an installer, start here.

Key Takeaways

  • Solar loans let you own your system and claim the federal tax credit (currently 30% through 2032). Leases and PPAs do not.
  • Dealer fees on solar loans are often 10 to 30% of the loan amount, added invisibly to your principal. Always ask for the “dealer fee” amount before signing.
  • Solar loans typically run 10 to 25 years at 3 to 9% APR, depending on your credit score and the lender.
  • Solar leases offer lower monthly bills with zero upfront cost, but you won’t own the system and may face complications when selling your home.
  • Power purchase agreements (PPAs) let you pay per kilowatt-hour rather than a fixed monthly payment, which can work well in high-sun states.
  • For professional installation with financing guidance included, call (855) 427-0058 or get a free quote here.

What Is Solar Panel Financing?

Solar panel financing is any arrangement that lets you pay for a solar system over time rather than in a single upfront payment. A fully installed residential system typically costs $15,000 to $35,000 before incentives, which is out of reach for most households without some form of financing. The good news is that several well-established options exist, each with different ownership structures, payment terms, and long-term financial outcomes.

The main categories are solar loans (you own the system), solar leases (the company owns it, you pay a fixed monthly fee), and power purchase agreements (you pay for the electricity generated rather than the equipment itself). Home equity loans and HELOCs are also widely used because they typically carry the lowest interest rates of all.

Which option is right for you depends on your tax situation, credit score, how long you plan to stay in your home, and whether maximizing long-term savings or minimizing upfront commitment matters more to you.

Types of Solar Financing

Solar Loans

A solar loan works like any installment loan: you borrow the full cost of the system and repay it in monthly installments with interest. The key advantage is ownership. Because you own the system, you’re entitled to the federal solar tax credit, which is currently 30% of the installed cost and runs through 2032. On a $25,000 system, that’s a $7,500 credit against your tax liability.

Solar loans come in two main forms: secured (backed by your home equity) and unsecured (personal loans). Secured loans carry lower interest rates, typically 3 to 6%, because the lender has collateral. Unsecured solar loans are faster to approve and don’t put your home at risk, but interest rates run higher, usually 5 to 9%. Most solar installers arrange unsecured loans through third-party lenders like GreenSky, Mosaic, or Goodleap.

Solar Leases

With a solar lease, a solar company installs panels on your roof and owns them. You pay a fixed monthly amount, typically 10 to 15% less than your current electricity bill, in exchange for using the electricity the system produces. There’s usually zero down and no maintenance responsibility on your part.

The tradeoff is significant. You don’t own the system, so you can’t claim the tax credit. Lease terms run 20 to 25 years with annual payment escalators (typically 1 to 3% per year) built in. And when you sell your home, the lease must either be transferred to the buyer or bought out, which can complicate and delay a sale. Some buyers simply don’t want to assume a 15-year solar lease.

Power Purchase Agreements (PPAs)

A PPA is similar to a lease but instead of paying a fixed monthly amount for the system, you pay a rate per kilowatt-hour for the electricity it generates. If the sun shines and the system produces a lot, your bill is higher. If it’s a cloudy month, you pay less.

PPAs are popular in states with high electricity rates and strong net metering policies, like California, Massachusetts, and New York. The per-kWh rate you pay is typically 10 to 20% below the local utility rate at signing, though annual escalators apply. Like leases, the company owns the system, so no tax credit and the same home-sale complications apply.

Home Equity Loans and HELOCs

If you have equity in your home, a home equity loan or home equity line of credit (HELOC) is often the cheapest way to finance solar. Rates typically range from 6 to 8% for home equity loans and slightly more variable for HELOCs. Because the loan is secured by your home, lenders offer better terms than unsecured solar-specific loans.

You own the system outright, the tax credit is yours, and you repay through your existing mortgage lender rather than a third-party solar finance company. The risk, of course, is that your home secures the debt. If you default, you could lose your house, not just your solar system.

Solar Loans vs Leases: The Core Differences

The loan vs lease decision comes down to one central question: do you want to own your system? If yes, a loan is almost always the better long-term financial choice. If minimizing upfront cost and ongoing responsibility is the priority, a lease may make more sense even if the long-term savings are lower.

Here’s how the numbers look in practice. Take a $25,000 system financed over 20 years at 6% APR with a solar loan. Your monthly payment is roughly $179. You claim the 30% tax credit ($7,500), which you can apply against taxes owed or roll forward. Over 20 years, assuming 3% annual electricity cost increases, a purchased system saves the average homeowner $30,000 to $50,000 compared to grid power.

A lease on the same system might drop your current electricity bill by $40 to $60 a month with no upfront cost. But after 25 years, the company has collected $20,000 to $30,000 from you in lease payments and still owns the system. Total lifetime savings are a fraction of what ownership produces.

The exception is households who can’t claim the tax credit. If you don’t owe enough in federal taxes to use the 30% credit, the math shifts. A lease may actually outperform a loan in year-one and year-five comparisons, even if it falls behind over a longer horizon.

Understanding Solar Loan Fees

Dealer Fees: The Hidden Cost

Dealer fees are the most important and least talked-about cost in solar financing. When an installer uses a third-party lender (GreenSky, Mosaic, Goodleap, and others), the lender charges the installer a dealer fee for bringing them the business. That fee is typically 10 to 30% of the loan amount and is almost always added to the principal you borrow.

On a $25,000 system with a 20% dealer fee, you actually borrow $30,000. You never see $5,000 of that money. It goes straight to the lender as the installer’s cost of using their financing platform. The interest rate on the loan might be 1.99% and look fantastic on paper, but when you account for the dealer fee, the effective APR climbs to 8% or higher.

Always ask your installer three questions before signing: What is the dealer fee amount? What is the principal I’m actually borrowing? And is the quoted cash price different from the financed price? Reputable installers will answer all three. Any installer who deflects or can’t tell you the dealer fee amount is a red flag.

Origination Fees

Some solar loans also carry origination fees, charged directly by the lender as a percentage of the loan. These typically run 1 to 5% and are either deducted from the loan proceeds or added to the principal. Unlike dealer fees, origination fees are disclosed in the loan agreement, so they’re easier to find. Still, add them to your APR calculation when comparing offers.

Prepayment Penalties

Not all solar loans allow early payoff without penalty. Some lenders, particularly those offering very low promotional rates, impose a penalty if you pay off the loan early. If you plan to use your federal tax credit payment to immediately reduce the principal (a common strategy with 18-month interest-free promotional loans), confirm there’s no prepayment penalty and that you can apply large lump-sum payments without restriction.

The Tesla Solar Loan

Tesla offers solar panel installation through Tesla Energy alongside its Powerwall battery storage product. Their solar financing is provided through third-party lenders rather than Tesla directly, which means the same dealer fee dynamics apply as with any other installer. The loan terms available through Tesla’s financing partners vary by your credit profile but are broadly comparable to other solar-specific lenders: 10 to 25-year terms with rates starting around 3% for borrowers with strong credit.

One notable Tesla differentiator is their fixed-price online ordering process. Tesla publishes system prices on their website and lets you configure and order without a sales visit, which removes one layer of the typical high-pressure sales experience. That said, customer service and installation timelines have historically been more variable with Tesla than with established local installers. Response times and post-install support are worth factoring into the decision, not just the financing terms.

If you’re comparing Tesla against a local installer, get quotes from both and ask each for the full loan disclosure, including dealer fees and effective APR. Tesla’s transparent online pricing can make comparison easier, but a local installer who knows your utility’s net metering policies and local incentives may get you to a better total cost outcome.

Solar Panel Financing Calculator

Use this calculator to estimate your monthly solar loan payment and see how dealer fees affect your actual cost:

Monthly Payment Estimator





How to Choose the Right Solar Financing

Start with your tax situation. If you expect to owe at least $7,500 in federal taxes over the next five years, a solar loan puts that 30% credit in your pocket. If your tax liability is low, the credit has less value and a lease or PPA becomes more competitive.

Next, check your credit score. Unsecured solar loans typically require a score of 650 or above for approval, and the best rates (under 4%) generally go to borrowers with scores above 720. If your score is below 650, a lease may be the only option available to you. If you have significant home equity, a HELOC offers a third path with potentially better rates than any unsecured solar loan.

Then ask about dealer fees before you ask about interest rates. A 2.99% loan with a 25% dealer fee costs more than a 6.99% loan with no dealer fee on most 15 to 20-year terms. Run the numbers on the actual principal you’ll borrow, not the quoted system price.

Finally, think about your timeline. If you plan to sell your home in the next five years, a long-term lease can complicate the sale. A loan, once paid off or transferred at sale, transfers more cleanly and often increases home value. Studies by Lawrence Berkeley National Laboratory suggest solar ownership adds roughly $4 per watt to home resale value, meaning a 6kW system adds around $24,000 to your home’s market value.

For help comparing financing options from installers in your area, call us free on (855) 427-0058 or get a free solar quote here.

Case Study: Loan vs Lease Decision for a Homeowner in Arizona

Background

A homeowner in Scottsdale, Arizona received competing quotes for a 7.5kW solar system. The cash price was $26,500. Two installers offered loan financing; a third offered a 25-year lease at a fixed monthly payment of $89 with a 2% annual escalator.

Project Overview

The homeowner’s electricity bill averaged $185 a month. Their federal tax liability was approximately $9,000 per year, making the full 30% credit usable within a single tax year. They planned to stay in the property long-term.

Financing Comparison

Installer A offered a 15-year loan at 3.49% APR with a 20% dealer fee, bringing the actual loan amount to $31,800. Monthly payment: $227. Total interest: $8,955. After applying the $7,950 tax credit to the principal in year one, effective monthly cost dropped to roughly $183.

Installer B offered a 20-year loan at 5.99% APR with no dealer fee, borrowing exactly $26,500. Monthly payment: $190. Total interest: $19,060 over 20 years. After tax credit, effective first-year cost was also around $183 a month, with the loan paid off five years earlier than Installer A’s.

The lease option required no upfront commitment but offered no tax credit, no ownership, and a payment that would escalate to $132 by year 25. Total payments over 25 years: $33,400, with no asset to show for it at the end.

Results

The homeowner chose Installer B’s no-dealer-fee loan. By applying the tax credit to the principal immediately after filing their return, they reduced the outstanding balance to $18,550 and paid off the loan in 14 years rather than 20. Total out-of-pocket cost including interest: $14,600, against a system generating roughly $4,000 a year in electricity value. Break-even came in year four. The lease would never have reached a comparable break-even point.

Expert Insights From Our Solar Panel Installers on Financing

One of our senior solar panel installers with over 12 years of experience in residential solar had this to say about dealer fees: “The number we see catch people most often is the dealer fee. A customer will come in excited about a 1.99% loan and we have to sit them down and show them the actual loan documents where their $22,000 system has become a $28,000 loan. That extra $6,000 never bought them anything. It went to the lender as the installer’s cost of using the financing platform. Always ask for the dealer fee in writing before you sign, even if the installer seems offended by the question.”

On the loan vs lease question, the same installer noted: “Leases made more sense before the 30% federal tax credit. At 26% or 22% the math got closer. At 30% through 2032, if you have tax liability to use it, a loan almost always wins over a 20 to 25-year horizon. The lease companies know this, which is why they push zero-down and easy approval rather than long-term savings comparisons.”

Frequently Asked Questions

What credit score do you need for a solar loan?

Most unsecured solar lenders require a minimum score of 640 to 650 for approval, but the best rates go to borrowers with scores of 720 or above. If your score is below 640, a solar lease or PPA is often the only financing option available. Home equity loans may be accessible at lower scores if you have significant equity.

What is a dealer fee on a solar loan?

A dealer fee is the amount a solar installer pays a third-party lender for using their financing platform. The fee, typically 10 to 30% of the loan amount, is added to your loan principal. On a $25,000 system with a 20% dealer fee, you actually borrow $30,000. The fee is not disclosed in the interest rate, so always ask the installer to state the dealer fee amount before signing.

Do you own the panels with a solar lease?

No. With a solar lease, the solar company owns the panels for the duration of the lease term, typically 20 to 25 years. You pay for the right to use the electricity they generate. This means you can’t claim the federal solar tax credit, and transferring or terminating the lease when selling your home requires extra steps.

Can you pay off a solar loan early?

Most solar loans allow early payoff, and many homeowners use the 30% federal tax credit to make a large lump-sum payment in the first year. However, some lenders, especially those offering very low promotional rates, include prepayment penalties. Check your loan agreement for any early payoff fee before assuming you can reduce the principal freely.

What happens to a solar lease when you sell your house?

You have two options: transfer the lease to the buyer (requiring their credit approval and agreement to assume remaining payments) or buy out the lease before closing. Lease buyouts can cost $10,000 to $25,000 depending on how many years remain. Some buyers are reluctant to take on a long-term lease, so it’s worth discussing with your real estate agent before listing.

Is the federal solar tax credit available with all financing types?

Only if you own the system. Solar loans, home equity loans, and cash purchases all qualify because you are the system owner. Solar leases and PPAs do not qualify because the leasing company owns the panels and claims the credit themselves. This is one of the most significant financial differences between loan and lease financing.

What is a solar PPA vs a solar lease?

With a lease you pay a fixed monthly amount regardless of how much electricity the panels produce. With a PPA you pay a rate per kilowatt-hour for whatever the system generates. Both options involve the solar company owning the panels. A PPA can work out cheaper in high-production months and more expensive in low-production months compared to a fixed lease payment.

Summing Up

Solar panel financing has never offered more options, but more options also means more ways to end up with a bad deal. The fundamentals haven’t changed: if you have the tax liability to use the 30% federal credit and a credit score above 650, a solar loan almost always produces better long-term savings than a lease or PPA. If you don’t, a lease may still cut your electricity bill significantly with no upfront cost.

The single most important question to ask any installer is the dealer fee amount. It matters more than the interest rate in most scenarios. A no-fee loan at 7% beats a 2.99% loan with a 25% dealer fee on virtually every time horizon. Get that number in writing before you sign anything.

And if you want a free quote that includes a full breakdown of financing options available in your area, call us on (855) 427-0058 or request a free solar quote here. Our network of installers covers all 50 states and can walk you through local incentives alongside your financing choices.