Ok, I dug out my "camper file". You are both correct, it is called a Converter. I have an INTELI POWER 9200, mdl. pd9245,output 13.6vdc, 45 amps. it is in a 2006 Camper. It will put out 14.4 volts for 4 hours on a depleted battery then drops voltage to 13.6 volts for 3-36 hours storage mode 13.2 volts (saves water loss) from 33 hours to 52.5 hours then bumps back up to 14.4 every 21 hours for 15 minutes. Owners manual graph shows a boost to 90% charge after 8 hours with a battery that was at 10.5 volts, full charge after 11 hours. So I guess I need to camp where I can run the generator longer so we don't deplete the batteries so much. So I'm ok and figured it out myself (lazy me), but its always nice to chat with you guys. Thanks again, trvsdad