I want to run a 850 watt AC motor for 10 seconds off 12 volt batteries.=20 How many 12 volt batteries and what AH would they need to be. I = calculate 6.5 batteries (80 volts)?, but the AH part has me puzzeled. Thanks for any help John -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu