Nobody has any real informationon them yet. If it's as efficient or better than the previous models, you shouldn't need much. I'd do 1 extra battery in the back per amp, but that's just me. Most will tell you 2 batteries per amp. Not cheap batteries either. Deka G31's are nicely priced these days in the classifieds.i meant the new ones...what would it take to power one of these? i might get two or three depends on what route i end up going with my subs