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Estimating battery requirements
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Battery sizing worksheet
Use the following worksheet to calculate your battery needs.
To ensure sufficient battery capacity, be generous when
estimating the operating time per day for each of your loads.
Appliance
(A)
Power
consumption
(B)
Operating time
per day
Daily watt-
hours
needed for
this
appliance
(= A x B)
W hours Wh
W hours Wh
W hours Wh
W hours Wh
W hours Wh
W hours Wh
W hours Wh
W hours Wh
Total daily watt-hours of AC load Wh
x Number of days between charges
= Total watt-hours of AC load between charges Wh
Battery Ah used between charges (divide by 10) Ah
Recommended Battery Bank Size in Ah (multiply by 2) Ah