Diplomat Don wrote:
Okay...I'll be more exact.....your converter converts 110v power to 12 volt, but uses the batteries as a cushion for even battery power and operation. No matter how you look at it, you need to have a good set of batteries!
The battery is used as a cushion but only for the high amp draw items like slide motors or high power inverters (If you have them). Even then, a piece of junk battery does the job when you are plugged in or if the engine is running. Sometimes you can get away with no battery at all if you connect the positive leads but that depends on the strength of the converter. You can tell the devices that use the battery bacnk as a cushion as they will have their own positive lead on the bank.
Edit: I should add that that is how it works on the units I have owned or looked at. Obviously there may be exceptions I guess..
