12v inverter draw on batteries with microwave
If I get a 2000w inverter for my MH and use my 1100w microwave, what will be the draw off the house batteries? Using Ohm's Law I calculate about 9 amps draw at 120v. Then converting from 120v to 12...
Forum Discussion
Hi,
Rule of thumb is divide input watts by 10. An 1100 watt micro might have an input of 1500 watts, so demand may be on the order of 150 amps. Unfortunately there is another factor called a Peukert Calculation so apparent draw may be a heck of a lot larger.
On a 170 amp-hour battery bank a 150 amp draw jumps up to 354 amps after the calculation. Your batteries will unlove you at that level of discharge.
Basically you can probably get away with heating up a cup of coffee, but a 15 minute run time may take the battery bank down below 50% state of charge. It may be possible the batteries would be permanently damaged.
Rule of thumb is divide input watts by 10. An 1100 watt micro might have an input of 1500 watts, so demand may be on the order of 150 amps. Unfortunately there is another factor called a Peukert Calculation so apparent draw may be a heck of a lot larger.
On a 170 amp-hour battery bank a 150 amp draw jumps up to 354 amps after the calculation. Your batteries will unlove you at that level of discharge.
Basically you can probably get away with heating up a cup of coffee, but a 15 minute run time may take the battery bank down below 50% state of charge. It may be possible the batteries would be permanently damaged.
