Bruce Karney Mountain View Jun 8, 2008 11:43 am

Several neighbors and I have had solar photovoltaic systems for slightly over a year, and there is anecdotal evidence that most of us have significantly reduced electricity usage in the first year of solar ownership. The effect is in the range of 10-30%. I think this is due to increased attention to everything having to do with electricity in our homes, and I wonder if it will be a permanent change. If this new, lower level of use is sustained over time, many of us will be in the situation of having "over-sized" solar systems because we chose the size of the systems based on prior usage levels. Does anyone know of a study that shows how electricity consumption changes in the first few years after adding solar PV to a home?

Best Regards,
Bruce Karney

Bruce @ km-experts.com
+1 650 903-0954 (fax)
833 Bush St.,
Mountain View, CA 94041 USA