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Old 10-20-2021, 09:41 PM   #1
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Electrical

Have 2012 Tiffin Allegro bus. Chassis batteries run down while plugged in to 50 amp service.
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Old 10-20-2021, 09:56 PM   #2
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Quote:
Originally Posted by jhklhume View Post
Have 2012 Tiffin Allegro bus. Chassis batteries run down while plugged in to 50 amp service.
Not all coaches are wired to charge the chassis batteries from the converter, and those that are may have a faulty device (like an echo charger). There are always parasitic drains on the chassis batteries and if not being maintained by the converter, they will die. How old are your chassis batteries?

Some with specific knowledge of the Allegro Bus will narrow this down for you, soon.
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Old 10-20-2021, 11:38 PM   #3
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I think prior to 2016 models, Tiffin had a trickle charger to keep the chassis batteries charged on shore power. You might see if you have one and if it's plugged in and working correctly. On models prior to introduction of the Spyder system, there was no direct way to keep the chassis batteries charged on shore power so they used the trickle charger.
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Old 10-21-2021, 09:51 AM   #4
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Our 2014 Allegro Bus has the trickle charger. It's plugged into a regular 120v outlet in the top right corner. But it either died or just wasn't enough to keep the batteries charged.

I'm in the process of installing a BIRD (bi-directional isolation relay disconnect). This is a replacement for the boost switch on the dash. This way my solar panels &/or inverter/charger will charge the chassis batteries, and the alternator will charge the house batteries.
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Old 10-22-2021, 07:39 AM   #5
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My 2019 Red 340 did not come with a chassis maintainer. The 2020 Red 340 does. When I went to Red Bay for other warranty work, Tiffin added it for free. It was a simple install. It is located under the drawers in the entertainment cabinet with the DC wires run through the bottom to the chassis battery compartment. I was planning to do it myself, but by simply mentioning it, it magically appeared.
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Old 10-22-2021, 07:43 AM   #6
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Quote:
Originally Posted by DRM901 View Post
Our 2014 Allegro Bus has the trickle charger. It's plugged into a regular 120v outlet in the top right corner. But it either died or just wasn't enough to keep the batteries charged.

I'm in the process of installing a BIRD (bi-directional isolation relay disconnect). This is a replacement for the boost switch on the dash. This way my solar panels &/or inverter/charger will charge the chassis batteries, and the alternator will charge the house batteries.
I should have added, that is inside the PS rear most compartment. Above the chassis batteries.
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