Loading NuWatt Energy...
We use your location to provide localized solar offers and incentives.
We serve MA, NH, CT, RI, ME, VT, NJ, PA, and TX
Loading NuWatt Energy...
NuWatt designs, installs, and manages solar, battery, heat pump, and EV charger systems across 9 states. One company, one warranty, one point of contact.
Get a Free QuoteYour solar payback depends on where you live in Maine. CMP territory towns (Portland to Augusta) pay $0.27/kWh. Versant territory (Bangor north) pays $0.32/kWh. Here is the payback for every major town in the state — no federal ITC, just honest math.
2026 Update: The federal 25D solar tax credit expired December 31, 2025. All payback calculations below reflect $0 federal credit. Maine net energy billing, property tax exemption, and sales tax exemption remain in effect.
8.0 yr
Fastest payback (Cape Elizabeth)
10.5 yr
Longest payback (Caribou)
$0
Federal ITC in 2026
1:1
Net metering credit
Maine spans 320 miles from Kittery to Caribou. That distance means meaningful differences in solar economics. Three variables drive your payback:
CMP charges ~$0.27/kWh (70% of Maine). Versant charges ~$0.32/kWh (30%, mostly northern/eastern ME). Higher rates mean each solar kWh saves more money, accelerating payback.
Southern Maine averages 4.2 peak sun hours/day; Aroostook County averages 3.6. That is a 14% difference in annual production — roughly 1,300 fewer kWh per year for an 8 kW system.
More installer competition in southern Maine drives prices to $2.95-3.08/W. Northern Maine, with fewer installers and longer travel distances, sees $3.12-3.20/W. Difference: $800-1,600 on a typical system.
Central Maine Power serves roughly 70% of the state, including Portland, Lewiston, Augusta, Brunswick, and the southern coast. These towns benefit from the most competitive installer market in Maine.
| Town | Region | System Size | Cost/W | Total Cost | Annual Savings | Payback | 25-Yr Savings |
|---|---|---|---|---|---|---|---|
| Portland | Southern | 8 kW | $3.05 | $24,400 | $2,592 | 8.5 yr | $40,400 |
| South Portland | Southern | 8 kW | $3.02 | $24,160 | $2,592 | 8.4 yr | $40,560 |
| Scarborough | Southern | 9 kW | $2.98 | $26,820 | $2,916 | 8.2 yr | $46,210 |
| Cape Elizabeth | Southern | 10 kW | $2.95 | $29,500 | $3,240 | 8 yr | $51,500 |
| Biddeford | Southern | 7.5 kW | $3.08 | $23,100 | $2,430 | 8.7 yr | $37,650 |
| Saco | Southern | 8 kW | $3.05 | $24,400 | $2,592 | 8.5 yr | $40,400 |
| Kennebunk | Southern | 9 kW | $2.99 | $26,910 | $2,916 | 8.3 yr | $46,110 |
| Kittery | Southern | 7.5 kW | $3.10 | $23,250 | $2,430 | 8.8 yr | $37,500 |
| York | Southern | 9 kW | $2.97 | $26,730 | $2,916 | 8.2 yr | $46,310 |
| Brunswick | Midcoast | 8 kW | $3.05 | $24,400 | $2,592 | 8.5 yr | $40,400 |
| Camden | Midcoast | 7.5 kW | $3.12 | $23,400 | $2,390 | 9 yr | $36,350 |
| Rockland | Midcoast | 7.5 kW | $3.10 | $23,250 | $2,390 | 8.9 yr | $36,500 |
| Bar Harbor | Midcoast | 7 kW | $3.15 | $22,050 | $2,192 | 9.3 yr | $32,750 |
| Augusta | Central | 8 kW | $3.08 | $24,640 | $2,538 | 8.8 yr | $39,310 |
| Lewiston | Central | 7.5 kW | $3.10 | $23,250 | $2,390 | 8.9 yr | $36,500 |
| Waterville | Central | 7.5 kW | $3.12 | $23,400 | $2,349 | 9.1 yr | $35,325 |
Note: Costs reflect 2026 average installed prices for each area. Annual savings assume 100% offset of electricity use via net energy billing at CMP's current $0.27/kWh rate. 25-year savings include 2% annual rate escalation and 0.5% annual panel degradation. No federal tax credit is included.
Versant Power (formerly Emera Maine) serves Bangor, Orono, and most of northern/eastern Maine. Higher electric rates ($0.32/kWh) mean each kWh of solar is worth 19% more than CMP territory — partially offsetting lower production and higher install costs.
| Town | System Size | Cost/W | Total Cost | Annual kWh | Annual Savings | Payback | 25-Yr Savings |
|---|---|---|---|---|---|---|---|
| Bangor | 8 kW | $3.12 | $24,960 | 9,200 | $2,944 | 8.5 yr | $48,640 |
| Orono | 7 kW | $3.15 | $22,050 | 8,050 | $2,576 | 8.7 yr | $42,350 |
| Presque Isle | 7 kW | $3.18 | $22,260 | 7,700 | $2,464 | 9.8 yr | $39,340 |
| Caribou | 7 kW | $3.20 | $22,400 | 7,560 | $2,419 | 10.5 yr | $38,235 |
Versant customers pay $0.05/kWh more than CMP customers. On a system producing 9,000 kWh/year, that is an extra $450/year in savings — $11,250 over 25 years. This is why Bangor (Versant) can match Portland (CMP) payback despite being farther north with less sun. If you are in Versant territory, your solar economics are better than many people realize.
Portland, South Portland, Scarborough, Cape Elizabeth, Biddeford, Saco, Kennebunk, Kittery, York
Brunswick, Camden, Rockland, Bar Harbor
Augusta, Lewiston, Waterville
Bangor, Orono, Presque Isle, Caribou
Pricing varies $0.20-0.40/W between Maine installers. On an 8 kW system, that is $1,600-3,200. Competition drives prices down, especially in southern Maine where more installers operate.
Oversizing wastes money since Maine NEB settles annually. Size to 100% of your annual usage — no more. Check your last 12 months of electric bills.
Rural Maine properties often have better ground-mount options than roof installs. Ground mounts can be oriented perfectly and avoid tree shading. Cost premium is $0.10-0.20/W but can yield 10-15% more production.
Installers in Maine are busiest June-August. Signing a contract in winter (Jan-Mar) when installers need work can save 5-10% on labor costs.
Towns like Presque Isle and Caribou in Aroostook County face longer payback (9.8-10.5 years) due to fewer sun hours and higher install costs. But there are compelling reasons solar still makes financial sense:
At $0.32/kWh, Versant customers pay 19% more per kWh than CMP. This higher rate means solar savings accumulate faster per kWh generated — $450+/year more than the same system in CMP territory.
Northern Maine has seen some of the most volatile rate swings in the state. Solar locks in your cost at $0/kWh for 25+ years. If Versant rates rise to $0.40/kWh (plausible by 2030), your payback drops to 7 years.
Rural northern Maine has more power outages and longer restoration times. Solar + battery provides energy independence that grid-connected customers in Portland rarely need. The value goes beyond simple payback math.
The average solar payback period in Maine ranges from 8 to 10.5 years depending on your town and utility. Southern Maine towns in CMP territory average 8-9 years. Northern Maine towns in Versant territory average 8.5-10.5 years. Higher Versant rates ($0.32/kWh) partially offset the lower solar production in northern regions.
Three factors drive the difference: (1) Your utility — CMP charges ~$0.27/kWh vs Versant at ~$0.32/kWh, so each kWh of solar is worth more in Versant territory; (2) Solar production — southern Maine gets about 15% more sun than Aroostook County; (3) Installation costs — more competition in southern Maine lowers prices by $0.10-0.20/W compared to remote northern areas.
No. The federal 25D residential solar tax credit expired December 31, 2025. Homeowners purchasing solar in 2026 receive $0 in federal tax credits. Maine state incentives — net energy billing, property tax exemption, and sales tax exemption — remain fully in effect and are the primary financial benefits.
Maine net energy billing (NEB) credits excess solar production at the full retail rate (1:1). This means summer overproduction banks as dollar-for-dollar credits applied to winter electric bills. NEB is the single most valuable incentive remaining in Maine and is what makes 8-10 year payback possible without the federal ITC.
Yes, for most homeowners. While northern Maine towns like Presque Isle and Caribou get about 12-15% less annual solar production than Portland, Versant Power rates are significantly higher at $0.32/kWh vs CMP at $0.27/kWh. This higher rate means each kWh generated is worth 19% more, partially compensating for lower production. Payback runs 9.5-10.5 years, still well within the 25-year panel warranty.
Most Maine homes install 7-10 kW systems. Southern Maine homes with higher energy use (electric heat pumps, EV charging) tend toward 8-10 kW. Northern Maine homes, often smaller and more energy-conservative, typically install 7-8 kW. Average electricity consumption in Maine is about 550-600 kWh/month.
Indirectly, yes. Maine exempts 100% of the added home value from solar panels from property taxes. While this does not directly reduce the cost of installation, it means you get the full home value increase (typically $15,000-$30,000 for a residential system) without higher property taxes. This improves the overall financial return beyond just the energy savings payback calculation.
These are averages — your actual payback depends on your roof, shading, and electricity usage. Get a free custom estimate for your specific property.