Di-Directional Isolator

Tom/Barb wrote:

MrWizard wrote:

best guess without more info
is you run the house batteries really low, take off down the highway and the alternator amps into the house batteries is too much for the contacts

We charge all night off the 50 amp External power, house batteries show 13.4 volts
as we drive the house battery voltage drops to 9.0 volts, because they are not being connected to the chassis battery pack.

There must be a better way.