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Clinton, Massachusetts
This Clinton homeowner wanted more than just lower electricity bills. With rates from Eversource ($0.28/kWh) and National Grid ($0.32/kWh), the economics of solar were compelling — but the real driver was energy independence and backup power. After experiencing grid outages, having reliable backup became a priority.
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 16.8 kW system using 40 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 IQ8M 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.
The 2× Panasonic EverVolt EVHB-X20 battery system was selected for its high capacity and reliable backup performance. Panasonic’s EverVolt line features robust lithium-ion cells with a 15-year warranty. The system is configured for essential-load backup during grid outages.
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 wanted battery backup after losing power twice last winter. The dual Panasonic EverVolt setup keeps our essentials running for over 24 hours. NuWatt sized the system perfectly for our usage.”
Homeowner in Clinton, MA
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