On Solar Energy Sources

25 to 45% more effiecient than a static array.

Interesting, we looked at active arrays but the additional cost wasn't going to gain us much, more like 10% improvement in power for a 30% increased costs and more maint. We elected to go with static ones.
 
I had a 5760 watt PV system installed on my home five years ago. It's grid tied with battery backup. The panels are roof mounted and static. The batteries are 6 volt and 400 amp hours each. Two banks of eight wired in series and the two banks wired together in parallel. Giving me a 48 volt system with enough battery power to run any electric motor in my house.

During the summer (AC all day and night @ 72 degrees) my average electric bill is about $110. The winter (wood stove heat) it's about $60. That's for 2100 sq feet all electric house except for the oven/stovetop. I probably produce around half of my required usage.

The whole system installed was $45k, but with tax credits and local rebates, it came down to $15k.

When power goes out, which is quite often with our wind load, the inverter converts to battery power seamlessly. It's nice to be able to make coffee no matter what.

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Control room with battery cabinets
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