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Solar load calculator

Enter how many of each appliance you use and for how many hours a day. You get a starting estimate for inverter size, lithium battery capacity and number of panels.

ApplianceQtyHrs/day

LED bulbs10 W each

Ceiling / standing fans60 W each

Television100 W

Refrigerator150 W, runs ~50% of day

Chest freezer200 W, runs ~50% of day

Laptop / phone charging60 W

Water pump (0.5 hp)400 W

Washing machine500 W

Air conditioner (1 hp inverter)~750 W average

Electric iron1000 W

Your estimated system

Daily energy use: 4.9 kWh/day
Inverter size: 1.0 kVA
Lithium battery: 3.7 kWh
Solar panels (550 W): 3 panels

Rough estimate using 5 peak sun hours, 75% system efficiency and 80% usable battery depth. Exact sizing is confirmed at a site survey.

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