Stop Renting Your Power: What a Solar Lease Really Costs You
If you've gotten a knock on your door or a mailer about "$0-down solar" lately, you've probably heard some version of this pitch: no money down, no maintenance, no risk, just a flat monthly payment and instant savings. It sounds like an absolute no-brainer.
As someone who builds these financial models for a living — not just sells them — I want to walk you through what's actually happening under the hood before you sign anything. Not because the lease is a scam. It isn't. But you deserve to know exactly what you're trading away, and why.
The Pitch vs. The Reality
Here's how a typical third-party-owned (TPO) solar lease works in Connecticut right now:
The financing company installs panels on your roof for $0 upfront.
They own, maintain, and insure the system for the life of the lease.
You pay them a fixed monthly lease payment — instead of a utility bill, or on top of a much smaller one — while the panels offset what you'd otherwise pay Eversource.
The financier claims the federal tax credit, because they own the system, and folds a portion of that value into your lease rate.
You get the option to buy the system outright around year 6, once their tax-credit recapture window has closed.
Simple enough. But here's the piece most pitches skip entirely.
Why the Tax Credit Question Isn't What It Used to Be
For years, the sales pitch was: "You probably can't use the tax credit anyway, so let us take it and pass some savings back to you." That framing doesn't hold up anymore.
The 25D residential solar tax credit — the one homeowners used to claim directly when they bought a system with cash or a loan — expired on December 31, 2025. It's gone. It doesn't matter how much you owe the IRS or how strong your tax situation is. If you buy a system outright today, there is no federal credit waiting for you.
The only way that 30% value still exists at all is if a third-party owner — a lease or PPA company — captures it commercially through a different part of the tax code (§48E), which only applies to systems they own. That's the real reason leases and PPAs are the dominant products in Connecticut right now: they're the last vehicle left that can touch that credit, even indirectly.
So the honest comparison isn't "lease and share the credit" versus "buy it and keep the credit yourself." That second option doesn't exist anymore for homeowners. The real comparison is:
Lease, with a year-6 buyout — no upfront cash, a monthly payment that includes the financier's margin and a slice of a tax credit you'll never see directly, but a real path to eventually owning the system.
Cash or loan purchase, with no tax credit at all — full ownership from day one, but you're financing 100% of the cost yourself with none of the federal offset that used to make ownership the clear winner.
That gap used to be enormous. It's a lot closer now.
Who a Lease Actually Makes Sense For
This isn't a pitch against leases — for the right household, this structure is a legitimate net positive:
You don't have the capital for a cash purchase or don't want to take out a solar loan. No draw on savings, no new debt on your credit report.
You want the maintenance and insurance risk off your plate. The financier owns the equipment, so if something breaks, it's their problem to fix.
You're planning to stay in your home at least 6+ years. That's roughly when the buyout option opens up and the lease starts converting into something closer to ownership.
You want predictable, protected monthly costs without managing a system yourself.
Who Should Think Twice
If you have the cash on hand, decent access to financing, and you're not in a rush, it's worth running the numbers on a straight purchase — even without the tax credit — before assuming the lease is automatically cheaper. Since 25D expired, that comparison has gotten a lot less lopsided than it used to be, and the only way to know which one actually wins for your roof, your usage, and your timeline is to run both scenarios side by side with real numbers, not marketing assumptions.
That's the kind of modeling I do for every homeowner I work with on the Shoreline — no pressure, no rounding in anyone's favor but yours. If you want to see what your actual numbers look like under both structures, reach out and I'll walk you through it.
Black Hall Sun Residential solar consulting, CT Shoreline & River Valley blackhallsunsolar.com