To answer the op question about the type of battery he should or should not use. I run my mobile van set up off of a bank of 6 6 volt golf cart batterys. I chose the golf cart batterys over all the rest becouse of the duty cycles you get out of them. golf cart batterys also have a pretty large amount of stored energy. meaning that they have lots of usable power. most other batterys will fail before the golf cart battery will. I would stay away from marine deep cycle or any of the color tops. I say this not becouse they are bad batterys but becouse they are not meant to be used in this type of install. you need to look for batterys that are meant to be drained and recharged over and over, golf cart batterys are very very durable they can take a crap ton of abuse and still provide hours of operation. one other option you can look at are the floor scrubbers you see in your walmart at night. these batterys have even more stored power but be prepaired to spend alot of money as they are expensive. you could actualy use less of them and get the same amount of run time out of your inverter but like i said they cost alot more. they do on average store about 35% more power than the golf cart batterys. If you are looking to run your inverter off of one battery you need to do more research on what inverters do. you would drain that battery in no more than 20 minutes. you need a decent sized battery bank and you better not skimp on wire size or you will burn your equipment up. I am talking fire not just ruin your equipment. I am using 00 welding cable to transfer the 12 volt into my inverter. you need to use the same battery in your battery bank do not mix size and type that also is a mistake good luck with your setup and buy a good battery charger