Bill.Satellite wrote:
What I believe you are looking for can be searched out with the use of a Kill-A-Watt meter. You plug each device into this meter and it reads exactly how much power the device uses. It may take a few days to plug, run, read and add up all the devices using all the power, but when you are done you can accurately measure how much power you are using so you can determine how much power you need.
The Kill-A-Watt (at least the model I have) only does AC. It plugs into a standard outlet and the device under test plugs into the K-W. Its a cool device though.
I have a Xantrex XBM system for keeping tabs on my two 12 volt AGMs.