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Lunenburg, Massachusetts
Like many homeowners in Lunenburg, 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 12.5 kW system using 29 Canadian Solar HiKu7 CS7L-430 panels (431W each). Canadian Solar HiKu7 panels deliver strong performance at a competitive price point. Their half-cut cell technology reduces power loss from shading and improves reliability over the 25-year warranty period.
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.
“Canadian Solar panels look great on our roof and the production numbers are impressive. NuWatt was transparent about costs and timeline from day one.”
Homeowner in Lunenburg, MA
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