 Inverter load calculations
For a rule of thumb just realize that the products of voltage times current at each voltage are equal for any transformer.
Easier said...the amps at 12 volts will be 10 times the amps at 120 volts. So a hair dryer using 15 amps at 120 volts will use 150 amps at 12 volts. If it is used for 12 minutes (1/3 hour) it will consume 50 amp hours.
If you want to add a refinement, divide by the conversion efficiency of your inverter. Mine is 89%. So the actual amps are 168.
Hope this helps. (And that's a pretty decent load.) You will need at 2 kw (or 2000 watt) inverter as amps times volts = watts
Steve
Nightingale |