Dave's Energy

Thursday, October 20, 2011

My Solar output has been staying fairly steady this year compared to 2010. My total solar output in 2010 was 9724 kwh or 26.64 kwh/day on average. Total electric usage on top of the Solar production is about 30 kwh per day in both 2010 and 2011. Given that my marginal rates for electricity above 30 kwh a day are $0.30 to $0.40 a kwh, I am saving about $3500 a year on my electricity bill. Given the net cost of my 7.3 KW system after incentives, my system will pay off in 9 years or less (less under the assumption that marginal rates will rise in future years).

My monthly 2010 solar electricity output looked like this (Jan was just a half month as that was when the system was turned on):









My monthly 2011 solar electricity output looked like this

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