Submitted by jfenim t3_10qd6el in RhodeIsland
Ryland42 t1_j6piiuy wrote
I have an 8kw system with backup installed. ROI is around 6 years. I used SolPower out of Charlestown. My electric bill has been zero since September and I have enough credit built up that it should stay at zero until the nicer weather is back.
Make sure your roof is less than ~12 years old or have it reshingled.
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