The PV Solar array has some data from winter months operations we would like to share.
There are less daylight hours during the winter time, the angle of the sun is lower in the sky and at times there is snow covering the array. Still, we have been successful in generating significant amounts of our total electricity consumption.
In November we generated 98% of our consumption, December was 65% (due to an equipment problem), January thus far is 75%.
During the winter months, we draw down on the credit on our account due to excess generation from the summer months. In April, if there remains a credit of kilowatt hours, it is swept clean and paid to us at a "wholesale" rate based on the New England regional electrical pool's cost for electricity generation (ISO New England).
As of today, our credit, or "banked" kwh is over 10,000 which represents a month and a half of consumption. Our forecast is to easily complete a year of solar generation come mid March 2010, where we operated our entire manufacturing and office facility off the sun.