Newbie..... Batteries?
I am desperate to be able to run a 1000 watt Microwave oven for a total of 15 minutes before needing to recharge the golf cart batteries. The inverter is 2000 Watts. How many 6 volt batteries will ...
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Hi philo111,
I can do 15 minutes on the microwave. It draws 1581 watts. But I do have surplus acid 12 volt AGM jars that total 556 amp-hours. I do have a 3000 watt Magnum inverter. It shows a draw of 160 amps IIRC. That works out to 40 amps per cell. A Peukert calculation shows that as 270 amps or 68 amps per cell. Weight of the battery bank is 420 pounds.
Before the AGM's I had 875 amp-hours of marine batteries. They too when they were new could power the microwave for your specified time. I did manage to get 9 years from 4 of them, and 6 years from 3 of them. I still use one as the starter battery, but this year there was corrosion around the positive post, so I expect its days are numbered. I've cleaned it up--and may replace it with an AGM. I can not use a starved acid jar there--they are too tall, unfortunately.
To expect four golf cart batteries to do 135 (peukurt adjusted )amps per cell for 15 minutes is asking a great deal of them. Normally 25 (real) amps per cell is a good target.
I can do 15 minutes on the microwave. It draws 1581 watts. But I do have surplus acid 12 volt AGM jars that total 556 amp-hours. I do have a 3000 watt Magnum inverter. It shows a draw of 160 amps IIRC. That works out to 40 amps per cell. A Peukert calculation shows that as 270 amps or 68 amps per cell. Weight of the battery bank is 420 pounds.
Before the AGM's I had 875 amp-hours of marine batteries. They too when they were new could power the microwave for your specified time. I did manage to get 9 years from 4 of them, and 6 years from 3 of them. I still use one as the starter battery, but this year there was corrosion around the positive post, so I expect its days are numbered. I've cleaned it up--and may replace it with an AGM. I can not use a starved acid jar there--they are too tall, unfortunately.
To expect four golf cart batteries to do 135 (peukurt adjusted )amps per cell for 15 minutes is asking a great deal of them. Normally 25 (real) amps per cell is a good target.
philo111 wrote:
I am desperate to be able to run a 1000 watt Microwave oven for a total of 15 minutes before needing to recharge the golf cart batteries. The inverter is 2000 Watts.
How many 6 volt batteries will I need?
THANKS!!
