Forum Discussion

ramsaymike's avatar
ramsaymike
Explorer
Jun 22, 2020

Battery interconnect logic

I have a recently acquired 2007 Coachmen Concord and am trying to determine just when the house and chassis batteries are connected. There are 4 wires attached to hot side of the solenoid controlling the connection. I have determined that the dash "aux start" and alternator
when running seem to connect them but no idea about what else. I am considering putting a switch inline to provide my own logic. I want to be able to use my newly added solar to at least do something while travelling rather than have the alternator do the work - at least that is the idea anyway. Does anyone see any issues with this approach?
  • NRALIFR's avatar
    NRALIFR
    Explorer
    Jun 23, 2020
    Understood.

    But, just to clarify, the DC-DC charger would replace your solar controller, not be “in addition to”. An MPPT solar controller does the same thing as a DC-DC charger, except the charger has both an alternator input and a solar input. You may still want some separation between the house and starting batteries though, and a separation relay could handle that.

    Also, a 30 amp DC-DC charger could likely keep up with your fridge running from an inverter, or at least be close enough that your house batteries could still be charged quickly when the fridge cooling unit was cycled off.

    :):)

About Technical Issues

Having RV issues? Connect with others who have been in your shoes.24,187 PostsLatest Activity: Jan 14, 2025