I just got my power bill for mid-February to mid-March, a whopping $20. Last year it was $261. A majority of the savings this month are from switching to "Time of Use" rates, which would have saved me about $1000 per year anyway, but I didn't realize that I could or should until I started evaluating solar. So while the savings I'm recording on this blog are real savings from "Time of Use" I'm actually almost doubling those savings compared to last year's electric bill.
My spreadsheet model based on historical data predicted 1.688 MWh. I actually generated 1.748 MWh, about 4% above my estimate. That's three consecutive months I've beat my estimates, which gives me a warm and fuzzy feeling that I'm still on track to hit that break-even point in September.
The savings prediction at the beginning of the month was $88.24. Actual savings off my bill this month was $91.36.
March Costs:
Loan payment: $229.16
March Savings:
Reduced electric bill (1.688MWh * $0.05227) = $91.36
Tax savings from deductible interest: $41.90
Running total of costs: $1,016.64
Running total of savings: $379.45
A prediction for April:
Reduced electric bill (6.61 * 30 * 10 = 1.983 MWh) = $103.69
Tax savings from deductible interest: $41.76
