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Battery Bank Sizing Worksheet
The following worksheet is a guide to help you determine your battery needs. Be
generous in estimating the time for which you will run each of the loads to ensure
sufficient battery capacity.
Table 1-2
Battery Sizing Worksheet
Appliance
(A) Power
Consumption (Watts)
(B) Operating Time
per Day (Hours)
Daily watt-hours needed
for this appliance
(= A × 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
× Number of days between charges
= Total watt-hours of AC load between charges Wh
Battery Ah used between charges (divide by 10 for 12 volt system;
divide by 20 for 24 volt system)
Ah
Recommended Battery Bank Size in Ah (multiply by 2) Ah