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Battery Types
B–4
975-0128-01-01
Battery Sizing Example
This battery sizing example illustrates a typical calculation, assuming an
opportunity to charge the batteries every three days.
This example illustrates how quickly your battery needs can escalate. To
reduce the required battery size, you can conserve energy by eliminating
or reducing the use of some loads or by re-charging more frequently.
When sizing your battery, resist the temptation to skip the last step of this
calculation (multiplying by 2). More capacity is better since you will have
more reserve capacity, be better able to handle large loads and surge
loads, and your battery won't be discharged as deeply. Battery life is
directly dependent on how deeply the battery is discharged. The deeper
the discharge, the shorter the battery life.
Appliance
(A) Power
Consumption (Watts)
(B) Operating Time
per Day (Hours)
Daily watt-hours needed
for this appliance
(= A x B)
TV & VCR
200 W
2 hours
400 Wh
Microwave oven
1400 W
15 min = 1/4 hour
350 Wh
3 lamps, 60 W
each
180 W
4 hours
720 Wh
Coffee maker
600 W
15 min = 1/4 hour
150 Wh
Steam iron
700 W
6 min = 1/10 hour
70 Wh
Total daily watt-hours of AC load
1690 Wh
x Number of days between charges
3
= Total watt-hours of AC load between charges
5070 Wh
Battery Ah used between charges (divide by 10)
507 Ah
Recommended Battery Bank Size in Ah (multiply by 2)
1014 Ah
XPower3000.book Page 4 Wednesday, December 10, 2003 6:52 AM
Summary of Contents for XPower 3000
Page 1: ...by XPower Inverter 3000 Plus Owner s Guide...
Page 8: ...viii...
Page 12: ...xii...
Page 34: ...3 16...
Page 40: ...4 6...
Page 44: ...5 4...
Page 46: ...A 2...
Page 58: ...C 4...