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Battery Sizing Worksheet
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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 the loads
you will run.
As your power requirements increase, you may need to use
more than one battery to obtain sufficient capacity. Read
“Two Batteries Connected In Parallel” to determine whether
two batteries are appropriate for the applications you intend
to power.
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