Our solar panel system exceeded expectations for its first year, even with all the dreary cloudy weather we've had the past several months!
- Predicted annual production: 3450 KWH*
- Actual first year production: 3561 KWH
We surpassed the annual forecast 8 days early (on June 28).
For the year, we produced about 47% of the electricity we used. However, due to the Washington State production incentive, our utility power bills are now zero.
Here's a look at the average KWH produced per day:
Highest production day: 22.23 KWH on Friday, July 10, 2009. (Weather: sunny; high temperature: 76 degrees F)
*Annual production forecast of 3450 KWH was calculated by our solar consultant in May 2009 based on the number of solar panels, panel rated wattage output, inverter/system efficiency, site shade analysis, roof pitch, latitudinal location, orientation to south, and typical seasonal climate conditions for the region (cloud cover, temperature, etc.).
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