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Old 09-10-2019, 09:26 AM   #1
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Battery Maintainer, Winter Storage

Being in the PNW, winters require winterizing the MH till Spring as we are not Snowbirds. I am looking to install a starter battery maintainer in order to keep the battery at charge and prevent freezing as it does get cold here. There are two units that I have come across but know very little about. One is the Amp-L-Start maintainer and the other is the Xantrex Digital Echo Charger. Has anyone used one of these or can recommend a good unit that does the job? Seem the price range is from ~ $50 to $120. (Coach batteries are not an issue as the unit will be plugged in for the winter.)
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Old 09-10-2019, 10:02 AM   #2
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Quote:
Originally Posted by HighDesert View Post
Being in the PNW, winters require winterizing the MH till Spring as we are not Snowbirds. I am looking to install a starter battery maintainer in order to keep the battery at charge and prevent freezing as it does get cold here. There are two units that I have come across but know very little about. One is the Amp-L-Start maintainer and the other is the Xantrex Digital Echo Charger. Has anyone used one of these or can recommend a good unit that does the job? Seem the price range is from ~ $50 to $120. (Coach batteries are not an issue as the unit will be plugged in for the winter.)
I have personal experience with that situation. If you are sure that the coach batteries will stay charged then an Amp-L-Start will feed from the coach batteries and keep the Chassis Battery up to snuff.

Happy winter!

Mike
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Old 09-10-2019, 11:07 AM   #3
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Are you sure your MH doesn't already have bi-directional charging ?

Plug it in and test for charging voltage on the chassis battery.

Look for a BIRD or BIM device.
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Old 09-11-2019, 08:06 AM   #4
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Got an email back from Tiffin this morning advising that the chassis battery will charge when Coach is connected to shore power. Good news!
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Old 09-11-2019, 10:33 AM   #5
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Got an email back from Tiffin this morning advising that the chassis battery will charge when Coach is connected to shore power. Good news!
Oddly enough, a person I know locally, who is quite knowledgeable about Tiffin's, said he went through the Spyder schematics and could not find anything that led to a chassis battery charge while on shore power. So now, I am bak to square one trying to figure this out.
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Old 09-11-2019, 10:52 AM   #6
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Simple test with volt meter.
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Old 09-11-2019, 03:55 PM   #7
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Got ahold of Tiffin service this morning and was told that on very late 2018 models forward, they no longer install the relay that switches over to the chassis battery once coach batteries are charged. So - off to find a trickle charger..
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Old 09-11-2019, 04:00 PM   #8
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That seems like a step backwards for Tiffin. I hope they are not just trying to save a few dollars.
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Old 09-11-2019, 04:33 PM   #9
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Battery Tender about 20 bucks at WalMart or Amazon and then you don't have to worry all winter. Will not overcharge and if you crank the engine or use any of the battery power, the Tender will charge until it gains a full charge then just sit there keeping the battery up as needed.
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Old 09-11-2019, 05:38 PM   #10
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I don't know about RVs, but I use a Battery Minder on my motorcycle, Mustang, boat batteries, and lawn tractor. I don't leave them on, I just put on once a month until charged. And I live in Wisconsin where it gets below zero frequently.

I have boat batteries over 13 years old that still work well.

I use this: https://www.northerntool.com/shop/to...BoCN6cQAvD_BwE
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