Maine's Community Solar Boom Is Going Bust: What Homeowners Should Do

Maine spent the last six years building one of the largest community solar programs in the country. As of early 2026, more than 750 MW of community solar is interconnected on the state's two big utilities — enough to power roughly 130,000 homes (Maine Public Utilities Commission, 2025 NEB report). It was supposed to be the model. Instead, Canary Media reported on May 8 that subscriptions are stalling, developers are walking away from contracts, and the state's Net Energy Billing (NEB) program is heading into a politically painful retreat.

If you're a Maine homeowner — or a homeowner anywhere watching policy whiplash unfold in real time — the question isn't "is community solar dying?" It's "what's the cheapest, most durable way to lock in lower electric bills before the rules change again?" Let's run the numbers.

What actually happened in Maine

Maine's NEB program, launched in 2019, let community solar developers sell credits to residential and small-business subscribers at a guaranteed rate tied to the utility's standard offer. For a while, the math worked beautifully: developers built mid-sized arrays (under 5 MW), subscribers got a roughly 10–15% discount on the solar portion of their bill, and Central Maine Power (CMP) and Versant absorbed the credits as required by law.

Then the bill caught up. According to the Governor's Energy Office, NEB credits added an estimated $220 million to ratepayer bills in 2024 alone — about $15 per month on the average residential bill (Maine GEO, January 2025 testimony). The legislature responded with LD 1777 in 2024, capping new enrollments and shrinking the credit value for projects that hadn't yet energized. Developers with signed but unbuilt contracts saw their pro forma returns collapse overnight. Canary Media reports that more than 200 MW of pipeline projects are now stuck or canceled.

The lesson isn't "solar doesn't work." It's that policy-dependent solar — where your savings live or die based on a credit rate set by a regulator — is fragile. The same story has played out in California (NEM 3.0), Hawaii (the original NEM phase-out), and Nevada (the 2015 PUCN reversal that briefly killed rooftop solar before a partial reversal). Every time, homeowners with their own panels on their own roof came out fine. Subscribers got squeezed.

The math: community solar vs. rooftop in Maine

Let's compare the two paths for a typical CMP residential customer using 9,000 kWh per year (slightly above the Maine average of 7,200 kWh per EIA Form 861, 2023) at the current standard offer of $0.176/kWh.

Community solar subscription:

• Annual electric spend before subscription: ~$1,584
• NEB credit discount (typical 10%): ~$158/year saved
• Subscription term: 20 years, but credit value can be revised by PUC
• Total 20-year savings (if rates hold): ~$3,160
• Upfront cost: $0

Rooftop solar (purchased, 7 kW system):

• Installed cost in Maine: ~$3.20/W average per EnergySage Q4 2025 marketplace data = $22,400
• NREL PVWatts estimate for Portland, ME (south-facing, 25° tilt): ~8,400 kWh/year
• Bill offset at $0.176/kWh: ~$1,478/year
• Federal ITC: expired for purchased systems in 2026 — only leases/PPAs still qualify
• Maine state incentives: net energy billing for behind-the-meter systems under 25 kW remains intact (separate from the community NEB program under fire)
• Simple payback: 22,400 / 1,478 ≈ 15.2 years
• 20-year savings (after payback): ~$7,100, plus an asset on the home

Without the federal 30% ITC, rooftop math in Maine is tighter than it was 18 months ago. But it has one feature community solar doesn't: your savings aren't subject to a PUC vote. Every kWh your panels produce is a kWh you don't buy from CMP, regardless of what happens to NEB.

Where leases and PPAs change the picture

Here's the wrinkle most Maine coverage has missed. Because the federal Investment Tax Credit was extended only for third-party-owned systems (the IRS guidance issued in February 2026 confirmed leases and PPAs through 2032 at 30%), a leased rooftop system in Maine can effectively pass the credit through as a lower lease payment. That's roughly a 20–25% reduction in lifetime lease cost compared to a hypothetical no-ITC lease.

For a homeowner who can't use a tax credit anyway (retirees, low federal tax liability), a lease or PPA is now mathematically competitive with — and sometimes better than — a cash purchase that gets no ITC. The trade-off: you don't own the asset, and escalator clauses in some PPAs can bite if you don't read carefully. Aim for a fixed-rate PPA with no escalator, or a lease with a buyout option at year 7.

Battery storage: the hedge community solar can't offer

This is where the rooftop case gets stronger. CMP's territory has averaged 4.2 outage hours per customer per year over the past five years (EIA Form 861-S, 2024) — well above the national average of 1.5 hours. Ice storms, nor'easters, and an aging distribution network mean Mainers spend more time in the dark than most.

A 13.5 kWh battery (the standard Tesla Powerwall 3 or Enphase IQ Battery 10T size) will back up essential loads — fridge, well pump, internet, a few lights — for roughly 24–36 hours depending on draw. Installed cost in Maine runs $14,000–$17,000. Maine's Efficiency Maine Battery Storage Program offers a rebate up to $3,000 for residential systems paired with solar, and the federal ITC for batteries (separate from the solar ITC controversy) remains at 30% through 2032 for standalone or paired systems regardless of ownership structure.

Community solar subscribers get none of this. You can't backup your house with a credit on a bill.

What to actually do if you're in Maine

Three reasonable paths, depending on your situation:

1. You already subscribe to community solar

Read your contract. Most NEB subscriptions allow exit with 90 days notice and no penalty. If your developer is on the list of stalled projects (the Maine PUC publishes a quarterly NEB enrollment report), the credit may shrink anyway. Sticking around is fine — just don't count on it for long-term planning.

2. You're shopping rooftop solar now

Get at least three quotes. Prioritize installers with NABCEP-certified designers and at least 10 years in business. Ask specifically: "Does this quote assume the federal ITC? If so, am I a lease/PPA or purchase?" If a sales rep promises 30% ITC on a cash purchase in 2026, walk away — they're either misinformed or dishonest.

3. You want backup power more than bill savings

Battery-only systems (no solar) qualify for the 30% federal ITC if charged at least 75% from a renewable source — which can include grid energy if your utility's resource mix is over 75% non-fossil (Maine's 2024 mix was about 78% non-fossil per EIA, so most Maine homes qualify). Pair the federal credit with the Efficiency Maine rebate and a 13.5 kWh battery can land around $9,000 net. That's roughly the cost of a 12kW propane standby generator with installation — except the battery doesn't need fuel deliveries during a storm.

The bigger lesson

Community solar isn't going away. Even with Maine's program contracting, the U.S. Department of Energy's National Community Solar Partnership reports more than 9 GW of community solar deployed nationwide as of late 2025, with growth in Illinois, New York, and Minnesota. The model works when it's structured around predictable bill credits and stable utility rates.

What Maine's experience shows is that solar value tied to a regulatory rate is only as stable as the next legislative session. Solar value tied to your own roof, your own meter, and your own panels is tied to the laws of physics — which are, on the whole, more reliable.

Run the numbers for your house

Maine's policy fight will keep evolving. Federal incentive rules are still being clarified. The cheapest electricity is the kilowatt-hour you don't buy, and the math for any individual home depends on roof pitch, shading, current usage, and which utility you're with.

If you want a sanity check on your own situation — Maine, anywhere in New England, or anywhere else — EnergyScout's free assessment tool uses NREL production modeling and your local utility rates to estimate real savings, with or without ITC, with or without battery. You can also look up incentives by ZIP or compare local installers before you call anyone.

The numbers are the numbers. Run yours before the next policy headline lands.