Solar lease vs loan vs cash vs PPA

The four options at a glance

Cash: best return, biggest commitment

Paying cash avoids interest and fees, so every dollar of savings goes to you from day one. You own the system, its output and any incentives you qualify for. The trade-off is tying up a large sum, typically $20,000 or more for an average home, that could earn a return elsewhere. See our payback guide to compare solar's return with your alternatives.

Loans: ownership without the lump sum

Solar loans come in two broad types. Installer-arranged loans often advertise low APRs but add a dealer fee to the system price. LBNL data shows the median financed price about $1.50/W above the median cash price. Independent financing, such as a credit union loan, a home equity loan or a home equity line of credit, may carry a higher stated rate with no hidden fee.

Before signing, ask for:

• The cash price and the financed price side by side.
• APR, term, and total amount repaid.
• Any prepayment penalty, and whether payments rise if you do not make a lump-sum payment by a set date (re-amortization).
• Whether the loan places a lien on the property or a fixture filing on the panels.

Worked example: the same 8 kW system, four ways

Assume an 8 kW system producing 10,400 kWh in year one, a utility rate of 18 cents per kWh, full retail credit for exports, and no incentives. Year-one bill savings are 10,400 × $0.18 = $1,872.

Cash at $3.00/W

Price: 8,000 × $3.00 = $24,000. Net year-one benefit: $1,872. Simple payback: 12.8 years.

Independent loan at the cash price

Borrow $24,000 at 6.99% APR over 20 years. The monthly payment is about $186, or $2,231 a year. Year-one cash flow: $1,872 − $2,231 = −$359. You pay about $44,600 in total over 20 years, but you own the system and still have its output for any years beyond the loan term.

Installer loan at the financed price ($4.50/W)

Price: 8,000 × $4.50 = $36,000. At the same 6.99% over 20 years the payment is about $279 a month, or $3,347 a year. Year-one cash flow: $1,872 − $3,347 = −$1,475, and you repay about $66,900 in total. Even if the advertised rate were lower, the higher principal makes this the weakest option here.

PPA at 14 cents per kWh with a 2.9% annual escalator

Year one: you pay 14¢ instead of 18¢ for 10,400 kWh, saving 10,400 × $0.04 = $416, with no upfront cost. Over 25 years, assuming 0.5% annual output decline and utility rates rising 3% a year, total savings come to roughly $14,800. If utility rates rise only 1.5% a year, the same contract saves only about $3,800, and later in the term the PPA price overtakes the utility rate.

Leases and PPAs: low effort, lower upside

With a lease you pay a fixed monthly amount to use the system; with a PPA you pay for each kWh it produces. Either way, the company owns, insures and usually maintains the equipment. That suits homeowners who cannot use tax benefits, do not want to borrow, or want no maintenance responsibility.

After the 2025 US tax law, leasing and PPA providers may still claim a business investment credit for systems that meet deadlines running into 2027, and some pass part of that value to customers through lower pricing. Whether they do is up to each company, so compare offers carefully. Check our incentives page for the current situation where you live.

Questions to ask about any lease or PPA

• What is the annual escalator? A 0% escalator is far less risky than 2.9% or more.
• Is there a production guarantee, and what happens if the system underperforms?
• What are the end-of-term options: removal, renewal or purchase, and at what price?
• How is the contract transferred if you sell the home, and what does the buyer need to qualify?
• Who pays to remove and reinstall the panels if your roof needs replacing?

Selling your home

An owned, paid-off system is simplest at sale time. A loan secured on the home may need to be paid off at closing. Leases and PPAs usually transfer to the buyer, who must agree to the terms and pass a credit check. A high escalator or long remaining term can put buyers off. If you expect to move within a few years, factor this in.

Which option fits you?

• Choose cash if you have the savings available, plan to stay long-term, and want the highest return.
• Choose an independent loan if you want ownership without a lump sum and can get a competitive rate with no dealer fee.
• Consider a lease or PPA if you want minimal upfront cost and responsibility, and the contract has a low or zero escalator and fair transfer terms.
• Consider community solar if your roof is unsuitable or you rent.

Whatever you choose, compare offers on a common basis. Our guide to comparing solar quotes shows how, and you can request free quotes that include both cash and financed pricing.

This guide is general information, not financial, tax or engineering advice. Prices and incentives change — confirm with qualified local professionals and official program sources. See our methodology and disclosures.