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Old 11-02-2020, 02:26 PM   #1
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Do AGM batteries Freeze? And an ALDE question

Getting ready to Winterize our 2018 Classic 30. Was watching some Youtube videos to get brushed up on the procedures and noticed that some people remove the batteries. Do you need to remove the AGM batteries if you have solar and a 110 trickle charger on them?

Also, can the ALDE system run all winter on 110V? I was thinking of setting it to about 54 degrees for storage if that was possible.

Thanks,

Call me Al
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Old 11-02-2020, 03:01 PM   #2
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I will find out this winter as I'm leaving my AGM batteries in the trailer.

Seriously, four years ago we did the same and the rooftop solar kept the batteries charged during the winter. The trailer is parked about a 10 minute walk from our house so I could check it regularly in case I needed to clear snow off the panel.
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Old 11-02-2020, 03:11 PM   #3
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A fully charged AGM will freeze at -80F

I googled it...
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Old 11-02-2020, 03:42 PM   #4
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Your google skills must be better than mine.
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Old 11-02-2020, 03:43 PM   #5
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I had the dealer winterize it last year and they didn't that the batteries out. But YouTube said....
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Old 11-02-2020, 03:50 PM   #6
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I've left my batteries in the last two winters. As far as the Alde I don't know.
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Old 11-02-2020, 04:04 PM   #7
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We have never taken our batteries out for the winter but, the lowest they have seen was in the teens. Also ALDE will run on electric but, when the temps get low it will run all the time to try and maintain temp. Not sure what you mean buy 110V? It's all 110Vac or 12Vdc battery. You would need to set your ALDE electric on 2
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Old 11-02-2020, 04:05 PM   #8
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I removed ours for the first 5yrs, got lazie and left them in for the next 6, if fully charged in good condition, no problem, no charging here in WNYS.
POI..they are still doing service as b/u power for the basement sump pump.👍

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Old 11-02-2020, 06:34 PM   #9
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Quote:
Originally Posted by Call me Al View Post
Getting ready to Winterize our 2018 Classic 30. Was watching some Youtube videos to get brushed up on the procedures and noticed that some people remove the batteries. Do you need to remove the AGM batteries if you have solar and a 110 trickle charger on them?

Also, can the ALDE system run all winter on 110V? I was thinking of setting it to about 54 degrees for storage if that was possible.

Thanks,

Call me Al

If you're winterized, why would you need to leave the Alde system running? The lowest setting on an Alde heater is 65 degrees. It will run all the time all winter long. If you are keeping something in the trailer and need to keep it from freezing, I would get a space heater like one of those that uses quartz light bulbs to heat with. Or maybe a Braun heater.

Again, why do you need to heat it?
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Old 11-02-2020, 06:55 PM   #10
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A discharged AGM battery will freeze. The key is to maintain a suitable charge. If you have solar panels, then they should keep the batteries fully charged without any problems. If the battery disconnect switch is off and the LP gas detector is also off, then the batteries might be OK for several months without any additional charge. Same is true if the battery cables are disconnected. A lead acid storage battery, including AGM, will slowly discharge over time even when there is nothing drawing power. Good, fully charged batteries should go three months and still be OK but there is no guarantee on that. If the charge drops below 50% - then they could freeze and destroy the battery. If in doubt, pull them out and take them into a heated space for the winter.
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Old 11-02-2020, 09:33 PM   #11
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According to Rich Luhr, if your 2018 is plugged in, it will keep the batteries charged even if your switch is set to "Store". So if you've winterized your water lines and have power to the trailer, you can leave the heater off and usage switch on "Store" and be OK. Leaving the heat on is like hanging a "Rodents Welcome" sign on your trailer.
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Old 11-03-2020, 05:31 AM   #12
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^
With a caveat, doing so may ruin the batteries if not checked periodically. (depending on the converter)

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Old 11-03-2020, 06:14 AM   #13
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Originally Posted by djb75 View Post
According to Rich Luhr, if your 2018 is plugged in, it will keep the batteries charged even if your switch is set to "Store". So if you've winterized your water lines and have power to the trailer, you can leave the heater off and usage switch on "Store" and be OK. Leaving the heat on is like hanging a "Rodents Welcome" sign on your trailer.
Rodents.... I didn't consider that. My idea was to help with controlling moister/mold. But you are absolutely right, that would be a haven for critters.

Thanks!
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Old 11-03-2020, 06:18 AM   #14
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Originally Posted by turk123 View Post
If you're winterized, why would you need to leave the Alde system running? The lowest setting on an Alde heater is 65 degrees. It will run all the time all winter long. If you are keeping something in the trailer and need to keep it from freezing, I would get a space heater like one of those that uses quartz light bulbs to heat with. Or maybe a Braun heater.

Again, why do you need to heat it?
I was thinking that heating it would help with controlling moisture and mold. I was going to get a space heater but then thought that the ALDE doesn't use much power and maybe I could use that instead. But DJB75 notes below, it would attract rodents. So changed my mind about heating the inside.

Thanks,

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Old 11-03-2020, 06:22 AM   #15
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Originally Posted by Airhead2018 View Post
We have never taken our batteries out for the winter but, the lowest they have seen was in the teens. Also ALDE will run on electric but, when the temps get low it will run all the time to try and maintain temp. Not sure what you mean buy 110V? It's all 110Vac or 12Vdc battery. You would need to set your ALDE electric on 2
I was referring to 110V regular household plug (15Amp?). I can use it to trickle charge all winter but was thinking that I might be able to use it for the ALDE as well. I have since changed my mind on that. See post from DJB75 below.

Thanks,

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Old 11-03-2020, 06:25 AM   #16
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I left my AGM batteries in place for winter storage and plugged my trailer into a 120V outlet at the storage facility. I set my battery disconnect switch to “Store”, and my Zamp charge controller shows that my batteries are receiving a charge as necessary.
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Old 11-03-2020, 06:38 AM   #17
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If you're concerned about moisture, you could probably put in a couple of dehumidifier packs and be fine. My daughter lives in Bremerton, WA and doesn't have access to electric in storage. She uses DampRid and says it does a pretty fair job of holding down the mold. You could go that route or put in a portable electric dehumidifier. That might take care of your moisture issues without inviting the mice in out of the cold.
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Old 11-03-2020, 07:15 AM   #18
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You live near water, so do I and dealt with this issue on my sailboat for decades. You want some ventilation to prevent moisture condensation. In my Airstream, leaving one of the hatches open, with the appropriate roof top cover, and the shower/bath vents open does that nicely. For mold, an ozone generator is far better than anything else. If you have power, put it on a timer for every day and you will be fine.
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Old 11-03-2020, 09:18 AM   #19
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Hi

The voltages on a lead acid battery are highly temperature dependent. An AGM is like any other lead acid in this respect. If it gets cold enough out, your "half charged" voltage could easily be above 13V (instead of the more normal 12.2 V). The stock charger in your AS knows nothing about temperature compensation. It's not going to keep the battery fully topped up ....

The big issue in any storage situation is parasitic drain. If you storage location is far away and the breaker trips .... you are in trouble. Battery capacity drops a lot when it's real cold. Your "ok for a week or two" batteries may die from parasitic drain in under a week ....

Best bet: Pull the negative wire on the batteries. Leave the heat turned off. All will be fine ....

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Old 11-03-2020, 09:24 AM   #20
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Do AGM batteries Freeze? And an ALDE question

Or install a Blue Sea Systems master battery switch. This is mine:

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Open cover, 1/4 turn and all batteries are disconnected totally.

Thatís a standard 2 outlet waterproof cover from the big box home improvement store with a bulge added in the center with the careful use of a heat gun and a push with a block of wood so the lid will close and clear the knob. And yeah, Iím not shy about carefully drilling holes in aluminum as necessary. Measure twice, drill once!
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