I have a small solar array on my roof. My electric bill was 32¢ last month. At this rate it will pay for itself in 20 years or so.
I'd love to have a larger array (the DC to AC converter can take 4 times the power I generate). But, by California law, any power I generate above what I actually use is a GIFT to PG&E...
How often do you change out your storage batteries, and what does it cost, please?