Planning my electrical and will likely have 2, 100 amp-hour, LiFePO4 for my house batteries that will be charged via a B to B charger (current candidates are a Kisae or Renogy 50 amp charger, or a Sterling 60 amp charger). I have the 2 starter battery setup with the heavy duty 230 amp alternator. We likely plan to be driving often, so at this point, I am not planning on having solar. In case we decide to extend our stay at a particular location and start to run low on juice, will running the vehicle at idle rpm's be sufficient to charge the house batteries? Also, any positive or negative comments on B to B chargers are welcome. Thanks!