House batteries to use with large inverter
We're planning some camping where generator use is restricted, so I want to make sure my batteries will hold up between charges. We'll usually draw less than 25 amps, but I'd like the option of runni...
Forum Discussion
2oldman wrote:
You will need 4 batteries of at least 400ah total to comfortably fire up a microwave. And if your inverter is MSW, it will have to run twice as long as if you had a PSW.
No you can use the MW if the two batts are above 75% (see my post above) Good point about the inverter. If it is MSW it will draw way fewer amps to run the MW than a PSW inverter would to run the same MW, so it is easier on the batteries.
The extra time is less important for the AH usage. I don't find it takes twice as long.
Say your potato takes 8 minutes with PSW at 150a but 10 minutes at 100a (what I see in real life comparison)
150 x 8/60 = 20 AH, while 100 x 10/60 = 16.7 AH
So actually, as long as the MSW inverter and the MW get along (never mind the groaning turn table as long as it runs at all ) you do better with the MSW for MW work. Of course the MSW inverter has to be one of the heavy duty types rated to run motors etc.
