Forum Discussion

Snowman9000's avatar
Snowman9000
Explorer
Oct 17, 2014

Wire converter to which side of battery switch?

Simple question; hard to pin down in search mode.

For a standalone deck mount converter, would you wire the + output to the battery side of the battery cutoff switch, or to the load/house side? Those are the only two choices! :)

16 Replies

  • Mine runs direct to battery, no switch in between because I want to be able to charge/float the batteries without having the house connected to the batts.
  • RoyB's avatar
    RoyB
    Explorer II
    I have two converters on my 12VDC Power Distribution system installed in the 2009 time frame..

    I have the original WFCO WF8945 Converter still functional in the bottom compartment of the WF8900 series Power Distribution system.

    I also added a PD9260C Stand-alone Smart Mode CONVERTER which is much closer to the battery switch later on..

    This is my wiring diagram showing both converters in use. I only use the WF8945 Converter as a back up unit and the PD0260C Converter as primary. I simply just flip the correct 120VAC Circuit breaker to turn 'ON' the converter I want to use.



    Roy Ken
  • I would run it through the switch in most cases.

    Exception would be if you relocated the converter close to the battery for the purpose of improved charging. In this case converter would be direct to battery, no switch, no fuse.
  • BFL13 wrote:
    If you have the old converter still hooked up inside the rig, and the deck mount up by the batts, then you can have the switch on the battery to old converter pos wire where it is now, and no switch for the new converter at all.

    That would let you run the rig on the old converter while the new converter charges the batteries with no load on them slowing down the recharge.

    This is how I have mine wired. The OEM WFCO runs through the switch and the IOTA deck mount is hard wired. The IOTA has a 3' wire run to the batteries.
    There was a spare breaker slot in the WFCO AC side so I put the WFCO on its own breaker. And the IOTA runs through a switched outlet in the front pass-through. I can run either the WFCO or IOTA converter, both, or none.
  • If the idea is to be able to run the rig on the converter with no battery, and that's the only converter, then by the battery

    If you have the old converter still hooked up inside the rig, and the deck mount up by the batts, then you can have the switch on the battery to old converter pos wire where it is now, and no switch for the new converter at all.

    That would let you run the rig on the old converter while the new converter charges the batteries with no load on them slowing down the recharge.
  • To me, a battery cutoff switch is just that, something to isolate the battery.