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Chelmsford, Massachusetts
Like many homeowners in Chelmsford, Massachusetts, this family was looking to take control of their electricity costs. With rates from Eversource ($0.28/kWh) and National Grid ($0.32/kWh), the numbers made sense — especially with Massachusetts’s available state and utility incentive programs.
In Massachusetts, solar homeowners can benefit from programs like SMART 3.0 and ConnectedSolutions. Sales tax exempt. Property tax exempt (20 years).
Important: The federal residential solar tax credit (Section 25D) expired on December 31, 2025. All savings calculations for this project reflect $0 federal tax credit for homeowner-purchased systems.
We designed a 8.4 kW system using 20 REC Alpha Pure-R 420W panels (420W each). REC Alpha panels offer industry-leading efficiency and one of the strongest warranties in the market (25-year product and performance). Their heterojunction cell technology delivers excellent performance in low-light and high-temperature conditions.
The Enphase IQ8+ microinverters convert DC to AC at each individual panel, maximizing production even when some panels are shaded. Enphase’s panel-level monitoring lets the homeowner track performance of every single panel through the Enphase app. The IQ8 series also supports Sunlight Backup — limited daytime power during grid outages even without a battery.
Equipment Reviews
Massachusetts SMART 3.0 provides $0.03/kWh for 20 years on residential systems up to 25 kW. ConnectedSolutions pays up to $275/kW for battery demand response.
Federal Tax Credit Status: The residential solar tax credit (Section 25D) expired December 31, 2025. Homeowner-purchased systems receive $0 federal tax credit. All savings estimates above are calculated without any federal credit. Third-party owned systems (leases/PPAs) may still benefit from the commercial ITC (Section 48/48E) claimed by the financing company.
“We got three quotes and NuWatt was the only company that didn't try to sell us on a tax credit that was about to expire. Honest pricing, clean install, and the Enphase monitoring app is great.”
Homeowner in Chelmsford, MA
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