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My pond consumes 30KW-hr of electricity daily. My swimming pool eats another 10 KWhr. My top rate is $0.36429/kwHr, charged by PG&E. This is pretty bad to the environment.
My Photovotaic system is 7.5Kw rated. Total cost $70K, rebate from Arnold Schwarzennegger $16K. My cost is $54K. My contrctor said I will recover the cost in 9 years (another said 6), my worksheet says 13. However long it may be, I don't really mind.
I like to add to what Phil said: In California, you need to get on the E7 rate badwagon. With this rate schedule, the peak rate happens between 12Noon and 6PM. If you produce electricity and 'sent' it to PG&E, you are credited for $0.3849/KwHr during the peak. You pay $0.36429/KwHr for electricity you get from PG&E. In general, PV produces the most power durinig peak, and I will likely end up with quite some surplus. So, the rate differences will help me recovering the cost.
stan
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