I explain how much this system cost and I go over the site plan and electrical diagram in this link Keep in mind the $3719 price doesn’t consider the federal or state tax incentives, which would lower it significantly. I’ve also modified this system to deal with an addition the homeowner put up in this video I show how to deal with roof penetrations and racking in more detail here. Dealing with Xcel and the building inspector were videos in themselves.
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Installing solar panels yourself, DIY.
Another How To video of a much larger system here 44.1 KW
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Systems been running for a total of 40 months: the one caveat to also keep in mind is that for about half a year we’ve been working with only 4 panels because of an addition on the house.
Update as of 9/5/16 the system has been running for
40 months total
It has produced 4.74 megawatts-hours total
1 megawatt = 1000 kw
So that equates to 4740 kwh total
4740/40 = 118.5 kwh per month
118.5/30 = 3.95
~3.95 kwh per day