I have a crazy ideal and I want to do a setup with my lights were I use a 12 volt car battery and have it connect to a 400 watt power convertor. And for my battery where it will get its charge from will be a battery charger which will be pluged into the wall. I figure it will cost me less money to run a battery charger rather than running a hps for 12 hours a day. And my power convertor says that it could power up a t.v no problem. And the reason I want to do it this way is because I don't want the electric company seeing a spike in my bill. So does anybody think this will work?