somebody double check these figures (sanity check)
So after crunching kw/h numbers for what seems like over a year I came up with the following for my cabin: my usage per month in the winter over the last three years was 200 kw/h per month this is due to occasional heat tape use for the water pipes when the temps dip hard -20C (-4F) at night.
I chose a 3.6kw array with a 600 a/h 48 vdc bank. winter peak solar hours are 3.5 for this area. Solar controllers are morningstar ts60-mppt x 3, and inverter is a MS4448PAE with BMK,/AGS.
Currently we only go up on the weekends, and the only load while gone is a 4 cubic feet refrigerator and nothing else as the pipes are drained each week. daily use works out to about 8 kw/h so I am hoping for enough battery and panel to cover at least 2 days without the diesel generator firing up, though my muddling away seems to indicate possibly three with very limited if any sun. can anybody confirm these rough calculations?
Sign me: a former Marine living on Fuji and muddling his way though life
18 JA solar 200 watt panels, morningstar controller(s) and a magnum 4448 inverter with all the usual junk that goes with it. and a 600 a/h 48 volt battery bank
1 · Share on Twitter