Is Solar Worth It in California, Massachusetts & CT in 2026?

By SolarCostData Data Desk · Reviewed September 2026 · Corrections log

Connecticut and Massachusetts both sit in the expensive tier — 24.2¢ and 30.5¢ a kilowatt-hour, about six cents apart. Put an identical system on a roof in each and Massachusetts breaks even in about 8.3 years. Connecticut takes 17.6. Nothing about the sun, the hardware or the installed price accounts for a gap that size.

The export rule accounts for it. Massachusetts still credits the power your panels push back to the grid at the retail rate. Connecticut has moved to net billing , where that surplus earns a fraction of retail. One policy difference, seven years of waiting — and it is almost never the variable a sales quote leads with, because it isn’t printed on the panel spec sheet or the price line.

This post is about that single variable. If what you want is the plain ranking — every state, fastest to slowest, on current rates with the federal credit gone — that’s the 50-state payback guide . What follows is the argument for why you can’t read that ranking off the rate column alone.

Six expensive states, one broken pattern

Six states carry the fastest solar economics in the country right now. Here they are with their real average residential rates from the U.S. Energy Information Administration (EIA ), and the payback on an 8 kW system priced at each state’s own EnergySage market rate — not one flat national price, because installed cost varies from about $19,800 in California to $27,100 in Hawaii. (For reference, the national figure is 8 kW at $2.58/W ≈ $20,640 — EnergySage, Aug 2026.) The 2026 federal credit is set to $0 throughout.

These are the same figures the state pages carry, from the same model: the payback column counts 2.5%/yr utility-rate inflation, $150/yr of running costs, one inverter replacement in year 14, and — critically for this post — each state’s real export regime, which is what sets the savings column. It is not simple division. Simple division on Connecticut’s numbers — a $21,840 system earning $1,246 a year — gives 17.5 years before costs; the 17.6-year figure above is the full model. The two sit close together; what they can never explain away is the seven-year gap to Massachusetts, which comes entirely from the savings column.

Set that against the national average residential rate of 17¢/kWh, the EIA 2025 annual US average (July 2026 monthly: 18.31¢), and every state on this list is paying a steep premium for grid power — from about 40 percent above average in Connecticut to roughly triple it in Hawaii. That premium is why solar works here at all: every kilowatt-hour these panels produce cancels an unusually expensive one. But look at the payback column rather than the rate column and the pattern breaks. Connecticut, at 24.2¢, takes the longest of the six by a distance — nearly twice as long as New York, which has a higher rate.

What separates them is the export rule. New York, Rhode Island and Massachusetts still credit exports at the retail rate, so every kilowatt-hour is worth the same whether you use it or send it away. Connecticut has moved to net billing, where surplus earns a fraction of retail — and since a typical home consumes only about 40% of what it generates as it generates it, most of the output is sold cheap.

A high rate is worth little if you are paid pennies for the surplus. That is the single most useful thing to know before getting quotes in 2026, and it is the thing most solar pages still leave out.

Because most people arrive at this page with one specific state in mind, here are the six rows above read out as verdicts, one typed question at a time.

Is solar worth it in California in 2026?

Yes — about a 9.7-year payback with the federal credit at $0. California’s 33.6¢ power does the heavy lifting, but NEM 3.0’s export cut is why it trails the Northeast cluster: exported kilowatt-hours earn a fraction of retail, so the value now leans on self-consumption — using or storing your own midday production instead of selling it cheap. Judge any California quote under NEM 3.0’s rules, not the old export math.

Is solar worth it in Massachusetts in 2026?

Yes, about as clearly as anywhere in the country — roughly 8.3 years at 30.5¢/kWh, no federal credit required. Massachusetts still credits exports at the full retail rate, so its expensive power converts into savings kilowatt-hour for kilowatt-hour. High rate plus retail export credit is the whole formula, and Massachusetts is one of the few states that still has both.

Is solar worth it in Connecticut in 2026?

On the plain numbers it’s marginal — about 17.6 years at 24.2¢, the slowest of the six. Not because power is cheap, but because net billing pays a fraction of retail for the surplus. What shortens it is structure, not sunshine: size the system to your daytime use, or pair storage so evening hours run on your own stored solar. The mechanics of that trade are worked through in net metering vs. net billing .

What about New York, Rhode Island, and Hawaii?

All three sit in the fastest cluster in the country — about 7.9, 8.5, and 8.6 years respectively. New York and Rhode Island still credit exports at the retail rate on top of ~29¢ power; Hawaii’s grid electricity is simply so expensive at 48¢ that payback lands around eight years regardless. In any of the three, the arithmetic question is settled — what remains is sizing, installer choice, and timing, which the national worth-it guide walks through.

A high rate gets you into the game

The clearest way to see it is to line up a high-rate state against a sunny cheap-power one and hold the hardware identical. Take Massachusetts and Nevada — the same 8 kW array on both roofs, each priced at its own state’s market rate. Nevada’s install is actually the cheaper of the two, about $19,000 against Massachusetts’s $23,300.

Nevada gets far more usable sun; a panel there generates more electricity per year than the same panel in Boston. And yet Nevada’s payback is roughly 20.8 years against Massachusetts’s 8.3. Massachusetts wins by more than two to one, despite the worse weather and the higher sticker price, and the biggest reason is the rate: Nevada power runs about 12.8¢/kWh while Massachusetts power costs 30.5¢. The Nevada panels produce more kilowatt-hours, but each one is worth barely half as much — even if Nevada still credited exports at full retail, its cheap grid power alone would hold payback to about 11.9 years. It doesn’t, though: Nevada moved to net billing in 2017, and that stretches 11.6 years past 20. Extra sun can’t outrun a rate that’s twice as high, let alone a rate that’s twice as high and a better export rule.

That much is settled, and the 50-state ranking works it through for every state. But notice carefully what the Nevada comparison proves and what it doesn’t. It proves a high rate is necessary. Connecticut is the demonstration that it isn’t sufficient: 24.2¢ power, well clear of the 17¢-assumption national average, and a payback still running more than twice as long as New York’s.

So there are three steps, not two. Sunshine decides how many kilowatt-hours you make. Your rate decides what each one is worth on paper. Your export rule decides how many of them you actually get paid that rate for. Almost all solar coverage stops after the second step, which is exactly how a state like Connecticut ends up filed under “high rate, good for solar” when its own numbers say otherwise.

Why these particular states pay so much

The cluster isn’t random. Hawaii sits at the top because it burns imported oil for much of its electricity, so island rates have long run in a league of their own. California’s rates reflect wildfire-hardening costs, transmission investment and utility rate structures that keep climbing. The Northeast — New York, Rhode Island, Massachusetts, Connecticut — pays for constrained pipelines, winter fuel costs and an aging grid. Different causes, same result: retail power well north of a quarter a kilowatt-hour, and a rooftop system that erases it more valuably than anywhere else.

Notice what’s absent from that list of causes: sunshine. Not one of these states earned its rate by being sunny, and several are among the cloudier places in the country. That’s the point the 50-state ranking makes at national scale — a payback map looks far more like a map of electricity prices than a map of sunlight. An installer who opens with your roof’s sun exposure is quoting the wrong variable; the two numbers that decide your payback are both printed on your utility bill.

It also means the paybacks above are conservative. Rates in all six states have trended upward for years with no sign of reversing, and this math assumes today’s price holds flat for the life of the system. In practice, the electricity you’re offsetting keeps getting more expensive, which quietly shortens real-world payback below the flat-rate figures in the table.

Connecticut is what the crack looks like

The genuine threat to solar economics in these states was never the lost federal credit. It’s what the utility pays for the power you send back — and in Connecticut that has already happened. The move to net billing is the entire reason a 24.2¢ state sits at 17.6 years while pricier neighbors sit at eight and nine.

California made the same move earlier and at far larger scale with NEM 3.0, cutting the credit for exported electricity so sharply that the value of a rooftop system now depends far more on using your own power in real time or storing it in a battery. Read the mechanics in our California NEM 3.0 explainer — it’s the fullest worked example of the rule change Connecticut homeowners are now living with.

This is the variable worth watching, because it can blunt a high rate. A 33¢ retail rate only translates into 33¢ of savings if every kilowatt-hour you produce offsets one you’d have bought at that price. When exports are credited at a fraction of retail, the panels are worth most when they’re powering your house at the moment they generate — which pushes buyers toward home batteries and toward sizing systems to daytime use rather than overbuilding for export. It doesn’t reverse the rate-beats-sun thesis; a high rate still beats a low one every time. But it means the cleanest paybacks increasingly belong to homeowners who consume their own solar, and the states most likely to follow California’s lead are exactly the high-rate ones on this list. Watch net metering , not the tax code. And whether to buy that battery outright or take a lease/TPO deal instead is its own arithmetic — the battery buy vs. TPO calculator prices both paths against your own numbers.

What it means if you live there

If you’re in one of these states, the end of the federal credit changed your math far less than the headlines suggested. A payback that stands up with a $0 credit was never leaning on the subsidy in the first place — the rate was doing the work, and the rate is still there. What can still move against you is the export rule, and Connecticut is proof it moves without warning.

So the order of operations matters. Ask your utility what it credits an exported kilowatt-hour at — the export credit — and whether that’s the retail rate or an avoided-cost rate, before you ask anyone about panels. If the answer is an avoided-cost rate, price a battery in the same breath: the battery payback calculator shows whether storage closes the gap at your rates. Then confirm the money with your own bill in the 2026 savings calculator — the figures above are one representative system, not your quote. Your exact state page carries the local specifics: California , Massachusetts , or Hawaii . And if your utility is mid-transition, net metering explained covers what grandfathering protects and for how long.

This post versus the ranking. What you’ve read here is one argument about one variable. If the question you actually came with is where does my state land — all fifty, sorted, on current EIA rates with the federal credit at $0 — that’s the 50-state payback ranking , plus the interactive solar map if you’d rather see it shaded. Read the ranking for your number. Read this for why two expensive-power states can finish nine years apart on the same hardware.

Frequently asked questions

Sources: U.S. Energy Information Administration (EIA) electricity rates · DSIRE incentive records · public IRS/OBBBA guidance. Figures are modeled estimates, not quotes or tax advice. See our methodology.

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