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Old 09-15-2020, 10:00 AM   #1
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2021 Interstate 24GL
Jacksonville , Florida
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Chassis Battery

We have a new 2021 Interstate and was wondering is anyone having problems with Chassis Battery losing charge when plugged into shore power.

Thanks in advance.
Joe
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Old 09-15-2020, 10:46 AM   #2
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The battery manager should charge all batteries if the switch at the door is on.

If that switch is off, blame the Fusion. The Fusion never entirely turns off. A longer push helps, but it still pulls some current. Many of us have installed switches to totally cut off the Fusion when not in use. There are threads on the forum with part numbers for matching switches.
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Old 09-16-2020, 08:47 AM   #3
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Originally Posted by Pahaska View Post
The battery manager should charge all batteries if the switch at the door is on.



If that switch is off, blame the Fusion. The Fusion never entirely turns off. A longer push helps, but it still pulls some current. Many of us have installed switches to totally cut off the Fusion when not in use. There are threads on the forum with part numbers for matching switches.


A 2021 has the Mercedes infotainment, no Fusion.
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Old 09-16-2020, 11:05 AM   #4
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A 2021 has the Mercedes infotainment, no Fusion.
That's awesome. About time!
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Old 09-18-2020, 02:31 PM   #5
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Spokane , Washington
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Joe, to clarify, what are you calling the Chassis battery. The 2020 and newer Interstates do not have a BIM, but have a Victron Buck Boost system, to protect the MB electronics. It controlled by a fuse under the PASSENGER feet floor. NOT under the driver seat. There is no longer a jack there but a bank of fuses.
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