In the near future I plan on installing a Sure Power 130amp battery isolator to charge the battery in my slide-in camper. I had hoped to install one of the newer AGM batteries in my camper. I have read that one of the characteristics of AGM batteries is that they can take all of the output an alternator can muster for however long it takes to charge them. On a battery website I recently read that even though an alternator may be rated at 130, or whatever, amps it can not keep this output up for very long. My question is this---Can the 130amp alternator in my 2005 F150 4x4 charge my AGM camper battery, the truck battery, run the heater, run the lights etc, for however long it takes and not burn out? Thanks

 

You will have a voltage drop across your isolator and your wiring so that can limit the current flow to your battery. you should use a circuit breaker (maybe 30 or 40 amp) for protection. You could install an ampmeter under the hood but I doubt you will see over 30 amp much if ever. You should use #8 or bigger wire. Hopefully someone with a camper will come in as this is different from a trailer with the much longer and smaller wiring.

Unless you ran battery cable to camper battery you could not feed it hi current. Remember your ground cable must be as big as the +12V cable.