☀️ Solar savings by state (2027)

Home solar is sold as a simple pitch — stop paying the utility, lock in your rate, let the sun do the work. The actual economics are more conditional than that. Solar pays off, and pays off well, for a large share of U.S. homeowners. It's a mediocre or poor investment for a meaningful minority too, and the difference usually comes down to three inputs: how expensive your electricity already is, how much sun you get, and what your state's net metering policy pays you for power you send back to the grid. Here's how to actually run the numbers instead of taking a sales quote at face value.

What a system costs, before and after the tax credit

A typical residential solar installation in the U.S. runs roughly $2.50 to $3.50 per watt installed before incentives, and most homes need a system in the 6-10 kW range to offset a meaningful share of usage — putting a gross system cost commonly in the $17,000-$30,000 range, before any credits. Costs vary by region (labor and permitting costs differ), roof complexity, and equipment tier (panel efficiency, inverter type, battery attachment).

The federal Residential Clean Energy Credit currently returns 30% of total system cost as a dollar-for-dollar reduction in your federal tax liability — not a deduction, a credit. On a $24,000 system, that's a $7,200 credit, bringing net cost to roughly $16,800. The credit applies to the full installed cost, including batteries if installed alongside the system. It's non-refundable but can carry forward to future tax years if it exceeds what you owe in a single year. Some states and utilities layer additional rebates or performance-based incentives on top, which we don't estimate here since they're program- and utility-specific — check your state's database of incentives directly.

How payback is actually calculated

Payback period is simply: net system cost ÷ annual electricity-bill savings. The part people get wrong is the denominator. Annual savings depend on:

• Your pre-solar electricity rate. The same system saves roughly three times more per year for a household paying 30¢/kWh than one paying 10¢/kWh, because every kWh the system offsets is worth more.
• System output, driven by your local solar resource (sunlight hours), roof orientation and tilt, and shading. A south-facing, unshaded roof in Arizona will out-produce an identical system on a partially shaded, east-facing roof in Ohio by a wide margin.
• How much of your usage the system actually offsets, which depends on sizing the system to your actual consumption rather than oversizing it.
• Net metering terms — how your utility credits excess power you export to the grid (see below). This can swing effective savings by 30-50% between a generous and a weak policy.

Put those together and a household with high electricity rates, strong sun, and full-retail net metering can see payback in six to eight years. A household with average or low rates, mediocre sun, and a weak net metering policy might be looking at fifteen-plus years — which starts to bump up against the practical lifespan of some system components and the point at which "is this worth it" becomes a genuinely close call.

What makes payback fast or slow, ranked

If you're trying to estimate your own likely payback before getting quotes, these factors matter roughly in this order:

1. Your current electricity rate. This alone explains most of the state-to-state variation in solar attractiveness — it's the single biggest lever.
2. Net metering policy. Full retail-rate net metering (1:1 credit for exported power) makes solar dramatically more attractive than states that have moved to lower "avoided cost" export rates.
3. Sunlight (irradiance). Matters, but less than people assume — a high-rate state with mediocre sun (much of the Northeast) can still out-economics a low-rate state with excellent sun.
4. Roof orientation, tilt, and shading. Can meaningfully shrink output on an otherwise good site; a good installer will model this specifically for your roof, not just your zip code.
5. System sizing relative to usage. Oversizing past what net metering credits well is wasted capital in many states.

Leasing and PPAs vs. buying

Solar leases and power purchase agreements (PPAs) let you install a system with $0 down, paying either a fixed lease payment or a per-kWh rate for the power produced — usually set below your utility's retail rate. The tradeoff: you don't own the system, so you're not eligible for the 30% tax credit (the leasing company claims it), your savings are generally smaller than an owned system's, and leases typically include an escalator clause that raises your payment a fixed percent each year. Leases also complicate home sales, since the buyer has to agree to assume the contract. Buying — whether cash or loan — captures the full tax credit and the full long-run savings, but carries the upfront cost and the performance risk yourself. As a rule of thumb: leasing trades a smaller, more certain savings for zero upfront cost and no ownership risk; buying trades upfront capital (or debt) for a meaningfully better long-run return, assuming you stay in the home long enough to realize it.

Reading a solar quote honestly

A few things worth checking before signing anything:

• Production estimates should be site-specific, modeled from your actual roof, not a generic zip-code average. Ask what shading analysis was done.
• Net metering terms can change. Some states have shifted from full retail credit to lower export rates for new applicants — check the current policy, not what a neighbor got years ago.
• Battery attachment adds cost and complexity and mainly makes sense for backup power or in states with lower net metering value, where storing your own excess power is worth more than exporting it.
• Roof condition and age matter. A roof needing replacement within 10 years should generally be replaced before or alongside the install, not after.

Treat every number in this guide, and every number a salesperson gives you, as an estimate to verify against your own utility rate and roof-specific production numbers — not a quote. For state-level electricity rate context to plug into your own payback math, see our electricity pages, and see the methodology behind the figures on this site.