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Rough Solar Calculations For 2 Person House
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Fred
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Joined: Tue Jan 15, 2008 2:31 pm Posts: 15073 Location: Home sweet home!
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140kwh weekly peak 20kwh daily 8h charge, 16h discharge Water heating, cooking included (not realistic would use gas) Solar panels 50% efficient in winter 20kwh / 8h charging = 2.5kw * 50% efficient = 5000w panels 13.6kwh discharge at night, / 16h = 0.85kw = 1200w inverter 1200w / 12v = 100a 100a * 16h = 1600ah batteries 24v or 48v likely Inverter 2000 to 8000nzd Solar 6sqm 60kg 1000nzd per kw Solar 30sqm 300kg,5000nzd Batteries 2 to 10 nzd per ah Batteries 3200nzd to 16000nzd (lithium), likely 4800nzd Cable, charge controllers, monitoring, etc 5000nzd
20k nzd worst case, likely less.
Advantages are no electricians fees, no permits, no down time, no bills, etc.
Feel free to nit pick and smash my assumptions.
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