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On April 2nd, we hit 12MWh total production from our 10.1kW system. On April 6th, it will have been producing for 1 year.
That is just over half (50.2%) of what we used over that period, saving us about $2,110 on electricity. We have received 2 SREC's quarterly payments for a total of about $1,350 (there is a delay to this process). The next 2 quarters are likely to be at least that much, as well.
Our monthly loan payment is about $329, so we have paid about $3,945. For the year, that puts us about $800 "ahead". Our tax credit is paying for the windows in the attic addition, and the rest will pay down the loan principal; so it will be reamortized, and lower our monthly payment, hopefully by about $100.
In addition, we have will have no gasoline costs, going forward; and no costs for oil changes and tuneups, etc. We used only 153 therms of natural gas for cooking, clothes drying, and several weeks of steam heat for our house.
All told, we will pay for the solar PV system in about 6 years - a 16.67% annual return!
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