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Select Solar Panels Size for Battery Charging 

Example:

Suppose for 120 Ah battery,
 

First of all, we will calculate the charging current for the 120 Ah battery. As we know that charging current should be 10% of the Ah rating of the battery.

Therefore,
Charging current for 120Ah Battery = 120 Ah x (10/100) = 12 Amperes.
 

But due to some losses, we may take 12-14 Amperes for batteries charging purposes instead of 12 Amp.

 
  • Suppose we took 13 Amp for charging purpose, then,
Charging time for 120Ah battery = 120 / 13 = 9.23 Hrs.




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