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What main factors should be considered when designing solar lamp?

The backup time depends on the battery capacity, so let’s keep all values the same except the battery capacity. It is also helpful to use the UPS backup calculator.The backup time depends on the battery capacity, so let’s keep all values the same except the battery capacity. It is also helpful to use the UPS backup calculator.

You can use the following simple formula:

If the battery capacity is 110Ah: backup time (hours)=110 x 12/290=4.5 hours

If the battery capacity is 220Ah: backup time (hours)=220 x 12/290=9.1 hours

Therefore, the battery capacity plays an important role in inverter backup/the higher the battery capacity, the longer the backup time.

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