How many solar watts are required to charge a battery of 35Ah?

It depends on hour

example: for 4 hour back up

35AH means 35 amps/1 hr

for 4 hrs : 35x4 = 140 amps

Solar watt required - 140 x 12 (Vx I) = 1680 watts

Please let me know this calculation is correct or not

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