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Old 05-16-2019, 03:48 PM   #1
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Can I safely use shore power to charge a chassis battery?

In diagnosing why my Kwikee steps quit working I discovered that they are wired to the chassis battery, which, oddly, seems standard. I also discovered that the chassis battery would not start the engine without a boost from the house batteries.

Question: Can I use the 110V outlet in my basement to plug in a trickle charger to attach to the chassis battery while I'm on shore power?
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Old 05-16-2019, 03:58 PM   #2
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Yes you can, but your converter should be charging the chassis battery.
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Old 05-16-2019, 04:00 PM   #3
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There should be no reason that would not work. You might want to consider installing a Trik-L-Start charger in the future which will connect and keep the chassis battery charged anytime the coach batteries are being charged.
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Old 05-16-2019, 04:04 PM   #4
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Quote:
Originally Posted by Phil-T View Post
Yes you can, but your converter should be charging the chassis battery.
Hmmmmm, okay. Well, either the battery is too far gone or the converter isn't charging it. I do have a 110V trickle charger, but the only 110V available to me is onboard. I just want to make sure I'm not crosswiring anything if I use it. My wife would neuter me if I burned her new toy to the ground...
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Old 05-17-2019, 04:32 AM   #5
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Put a multimeter on the battery and read the voltage with no shore power connected. This will give you an idea of the battery condition. Now connect the shore power and read the meter agasin, if being charged by the converter, then voltage will/should be 13v +.
Guess it's possible your converter does not charge the chassis battery.
Same procedure while engine is of, then running will tell if the engine system is charging that battery, it should be.
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Old 05-17-2019, 07:08 AM   #6
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Eric, My 2008 WInni had the same problem of battery drainage when in storage. The trickle charger they have installed would not keep up with the demand of the parasitic current draw.

I called Winnebago after several months of this happening and the reply was to turn off the step as there is more current draw than than the system can provide for re-charging. Once I did that I never had a problem again when it was plugged in at my storage area.

Also they said to leave the disconnect switches ON, as the inverter needed them to be on in order to charge. Turning them off disconnects the charging system.

With all that said, remember it was my 2008, but even now with my 2015 I leave the steps off when not rolling down the road. I typically turn them on at my first potty stop or fuel stop to prevent anyone pulling in alongside from hitting them but once at a CG, home, or in storage they are always OFF. It may or may not help with your problem but what can one little switch hurt by turning it off.

Good luck and let us know what you find.

In direct response, yes, if you are plugged into a pedestal or 110v anywhere then the RV Receptacles can be used to plug in and charge the batteries. You could also plug directly into the pedestal or home 110v to charge.


FYI Info: Winnebago told me that the steps operate on an electronic current limiter switch. This switch always has current supplied to it and may be more of a current draw than the trickle charge can provide.
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Old 05-17-2019, 09:37 AM   #7
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Quote:
Originally Posted by Phil-T View Post
Yes you can, but your converter should be charging the chassis battery.
Simply not true in most coaches. Your chassis battery will be charged by the alternator but not the converter (which will only charge the house batteries). In new coaches, the chassis battery is often charged but not in one of your vintage.

Suggest you get an Amp-L-Start as it can provide more charging current than the Trik-L-Start.
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Old 05-18-2019, 07:20 PM   #8
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Battery is at 12.3 after being on the trickle charger for a full 24 hours. I am beginning to believe I have found the problem.
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Old 05-18-2019, 10:27 PM   #9
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Before you jump check specific gravity and put that thing on a real charger. It needs more than a trickle to get back healthy. If it won't charge on a good real charger then yeah, you found one problem. The other one is needing the Amp-L-Start because it will provide a lot more amps to charge the chassis battery.
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