As a rule of thumb, with a load of 1200VA you should be using a 24 or 48V inverter, not 12V.
That way for your need of 2400VAH, requiring 12000VAH of battery capacity, you can put low voltage batteries in a single series string instead of putting ten 12V 100AH batteries in parallel.
Do not get trapped in a 12V box!
Look at 6V or even 4V or 2V deep cycle (RE) batteries to get the AH rating you need.
My example numbers threw in the more conservative factor of 5 for minimum 80% SOC. I just did not call attention to it, so thanks for clarifying.And once you figure the battery amp-hours you need to power the load, double it so that your battery state of charge stays above 50%.
Obviously I did not do the math.My example numbers threw in the more conservative factor of 5 for minimum 80% SOC. I just did not call attention to it, so thanks for clarifying.
And once you figure the battery amp-hours you need to power the load, double it so that your battery state of charge stays above 50%.