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Home Forums Technical Discussion Power Usage Re: Power Usage

#63923

Hereis a post from Alt tech site

Here is an attempt at the whole house off grid needs.

My usage has traditionally run at about 1200kwh per month.

Thats about 40 kwh per day.

To cover this usage, I would need to consider roghly this:

Solar Panels / PV:

an example: 170w panels over 4 net hours of peak performance = 680 watt hours 40000/680 = 59 panels needed!

so, 60 panels at about 800$ each = 48,000$ !!!

Batteries :

an example: 100ah 12v = 1200 watt hours deliverable max at full discharge

To stay in the top 20% ( for longevity and give a couple of days when sun is poor ) = 1200*.2 = 240 watt hours per battery

40000/240 = 167 batteries needed !

so, 168 batteries at 200$ each = 33,000$ !!!