How many batteries will support it?

do it like a loads list.  multiply battery amp hour capacity by its voltage to get watt-hours.  divide by your load (1000) to find how many hours til you wreck the batteries.  or, take your answer by half to find the number of hours to 50% where you wont wreck the batteries. 

air conditioners and batteries generally don't go in the same sentence, but lets see what the math says.

james
Alt-E staff

10 batteries would only barely do the job and to completely discharge them would probably ruin the batteries after a few cycles. 24 batteries would give you a few years before you have to replace the batteries, but here are a few questions to ask yourself:

1. What are you going to use to recharge the batteries?
2. Why not use that power source to run the A/C?

Batteries are only about 70% efficient if you discharge them to 50% of capacity. That means that every time you suck 4 kilowatt hours from your battery bank, you will probably have to input 6 kilowatt hours from another source to completely recharge the batteries.

It would probably work out cheaper to run the A/C on a small portable generator.

If you want to use solar to power the A/C, then about 1000 watts of PV power is the minimum that you will require and that means you have nothing left over for anything else after running the A/C.


John