Forum Discussion

SunClipper's avatar
SunClipper
Explorer
May 12, 2015

Chassis battery charging

I have a 2002 Winnebago Brave 32V on a Ford F-53 V10 chassis.
Whwn connected to shore power, the chassis battery runs down to the point it will not operate the slides.
Is this normal, or do I have a problem with the 12v. electrical system?
Other than charging the chassis battery with a separate charger, is there a more convenient fix for this problem?
thanks,
J.S.
  • No, that is normal. Many rigs do not charge the chassis battery from the shore power.
    I used a small fused jumper between the chassis and coach batteries to keep chassis battery up.
    No shore power install a battery disconnect or if equipped with a battery disconnect that disconnects all loads, use it.
  • Yes, this is normal. The chassis battery needs to be recharged with a battery mind or a battery charger. The coach batteries are automatically charged by the power converter.
  • smkettner wrote:
    Trik-L-Start

    Although if you have a BIRD (bidirectional relay) you should have this item repaired.


    z2.

    Further - Consider starting your engine BEFORE you attempt to engage slide - starting engine should put both coach/chassis batteries online which may help engage slide and also prevent you from being stranded with dead chassis battery.
  • Correct, many coaches have no provision for charging the chassis battery from shore power/generator.

    Two choices:

    Small, stand alone smart charger for the chassis battery.

    OR, a smart "relay" such as Xantrex Echo charger that will charge the chassis battery bank when voltage at the house bank is above XX (i.e. it takes power from the house battery to charge the chassis battery).

    Either is just fine and have been around for decades.