Battery usage time calculation.

I need help in calculating battery usage time.
I have load 1800W for 220V circuit
I am planning to use inverter 12V to 220V, nominal power 1500W/max 3000W
Batttery 12V, 142Ah, 850A

1800W (load) / 12V (battery voltage) = 150A

So working time: 142Ah / 150A = 0,94h?
 
Hello,

A lot more info can be found here:

Bertus
 
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