AC Breaker Calculations
AC Input / Output Sizing
- Inverters are equipped with an AC Input overload protection breaker (press button type) – Different rating for each model.
- Obviously, if you are wanting to add your own breaker before this input, you would prefer your breaker to trip before the inverters’
- Inverters are rated to supply at least 2 x their rated output for up to 5 sec,
- The internal transfer switch is rated to handle this same 2x rated capacity.
Some simple math:
- Watts / Volts (AC output) = Amps (A eternal unchanging law)
- 1000W rated inverter / 120V output = 8.3A so 2 times this rating would be 16A, so a 16A breaker on the AC Input is perfect.
- AC Output, if you wish to load up your inverter to 2x then install a 16A breaker at output, otherwise a 10A is perhaps a little wiser.
- 2000W / 120V = 16A to 32A (same rules apply as above)
- 2400W / 120V = 20A to 40A (ditto)
- 3000W / 120V = 25A to 50A (ditto)
- (LV5048 in Single Phase Mode)
- 5000W / 120V = 40A to 80A
- (LV5048 in Split Phase mode – 2500W per phase)
- 2500W / 120V = 20A to 40A