Why Are Solar Leases 20 or 25 Years?
Solar leases run 20 to 25 years by design — that's how the finance company recovers its cost and profit. Here's why the term is long, what it commits you to, and how ownership avoids it entirely.
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Short answer: The term is long because that's how the finance company gets paid. The company owning the panels fronts the full cost, and it recovers that plus profit through two decades or more of your monthly payments. A 20–25 year term matches the useful life of the equipment and spreads the cost thin enough to make the monthly number look small. Owning the system — cash or a loan on a shorter term — is how you avoid committing to a contract that long.
The term isn't arbitrary — it's the business model
A solar lease or PPA isn't a product you buy; it's financing you rent. A third party pays for the equipment and installation up front, puts it on your roof, and then earns its money back over time from your payments. To recover a large up-front cost plus profit while keeping the monthly number attractive, the math needs a long runway. Twenty to twenty-five years is that runway.
It also happens to match how long the panels are expected to produce. Solar modules commonly carry 25-year performance warranties, so a 25-year lease lines the contract up with the productive life of the hardware. That's convenient for the finance company: it collects for essentially the whole time the equipment is worth anything.
A long term isn't automatically a scam. But understand what it is: two decades of payments to a company that owns the equipment, structured so the monthly figure looks small and the total looks large.
What a 25-year commitment actually locks in
Signing a 25-year lease commits you to more than a payment. Many leases include an annual escalator that raises the payment every year. You're tied to that company's service and repair timelines. And, as covered in our resale article, the contract complicates selling the house until a buyer assumes it or you buy it out. The length multiplies each of those factors.
An example of how the total adds up
A lease at $130/month with a 2.9% annual escalator doesn't stay $130. By year 25 the payment is closer to $260, and the sum of all payments over the term can run well past $60,000 — for equipment you never own. The monthly number is designed to feel manageable; the lifetime total is where the real cost lives. Model it out; don't eyeball the monthly.
How to avoid a long contract: ownership
The clean way to sidestep a 20–25 year commitment is to own the system. Paying cash ends the question of term entirely. A solar loan still involves financing, but you choose the term — often 10, 12, or 15 years — and at the end you own the asset outright instead of handing two-plus decades of payments to someone else. Note the 2026 tax context: the 30% federal residential credit (Section 25D) ended for owned systems placed in service after December 31, 2025, so ownership math for a 2026 install should not assume that credit.
So when does a lease still make sense?
A lease can fit someone who wants zero up-front cost, can't use a tax benefit anyway, and values a maintenance-included arrangement over building equity. It's a real option — just not a cheap one, and not a short one. The length is the price of the structure.
Questions worth asking
- Exactly how many years is this term?
- Is there an escalator, and what is the payment in year 1 versus year 25?
- What's the total of all payments over the full term?
- What would the same system cost to own outright?
• When this might not make sense
We'd rather lose a sale than put you in the wrong solution. Reasons we might tell you to wait or pass:
- —You're uncomfortable committing to any contract that runs 20+ years
- —You could pay cash or qualify for a shorter loan and would rather own the asset
- —You expect to move well before the term ends and don't want the resale friction
- —The lease carries an escalator that pushes the lifetime total far past what ownership would cost
Sources
- Solar Lease & Leasing Guide: Pros and Cons — PalmettoSecondary
- Instructions for Form 5695 (2025) — IRS (2026)Primary
- Financing a home solar system — CFPBSecondary
Long lease, or own it? Run the real numbers first.
We'll put the lifetime cost of a lease next to owning the same system on your actual usage — no assumptions, no pressure.