Massachusetts remains one of the strongest solar states in America even after the federal credit expired: SMART production payments, full retail net metering at roughly 31.5 cents per kWh, a $1,000 state tax credit, and the ConnectedSolutions battery program stack into 7-8 year paybacks that most states envy. The catch is that the math shifts city by city with utility territory and rates, which is why every guide below runs the local numbers honestly.
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