Xantrex-technology 3000 Manuel d'utilisateur télécharger pdf (Page 50)

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

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Xantrex-technology 3000 Manuel d'utilisateur Page 50