pianotuna
Regina, SK, Canada
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Joined: 12/18/2004
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Hi bobndot,
Yes, but not for long term winter storage. Best to charge to about 50% then disconnect. Make sure the heating feature is turned off.
I use reconditioned telcom jars. Cost is $1 per amp-hour. Mine are now six years old and meet my needs. They are maintained by a solar charging system during the winter.
Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.
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pianotuna
Regina, SK, Canada
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Joined: 12/18/2004
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jwcolby54 wrote:pianotuna wrote:Hi,
I think LI are wonderful. They are, unfortunately, not a good fit for me.
When the RV is in storage it gets down to -40, so no you can't help.
I have to laugh. Folks winterize their water systems all the time but can't winterize their batteries? It is called a battery disconnect switch. LiFePO4 batteries have very low self discharge. Charge it and then turn the disconnect switch. Done.
And no, I can't help you.
Perhaps I can help you. Li batteries best practise is to charge to 50% for long term storage. If one really wishes to push the envelope, discharge no lower than 40% and recharge to 85%. Every thirty days do a cycle to 100%.
The exception currently is to use Lithium Titinate. I can't afford $2000.00 per 100 amp-hours.
I hope the new solid state batteries will be usable in extreme cold.
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bobndot
USA
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Joined: 08/21/2007
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Pianotuna, ok thank u.
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SJ-Chris
San Jose, Ca
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Joined: 09/24/2017
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To add an extra battery, I converted (on Majestic 28a RVs) one of the small driver side compartments into a battery compartment. One battery fits with a little room to spare. I drilled some holes in the side of the compartment for ventilation. I also added some straps underneath and to the frame to give it additional support. With this, I was able to add a 2nd battery to my Majestics. No problems for several years so far.
I also have a 23' Class C RV. It came with 2 batteries in the entry step that I replace with GC 6v batteries. I notice that on this 23' RV I also have a small compartment on the driver's side that I have never used, but in theory it could be used for an extra battery. Maybe your 23' Majestic has a similar storage compartment you could convert.
Good luck!
Chris
San Jose, CA
Own two 2015 Thor Majestic 28a Class C RVs
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jwcolby54
Hudson nc
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Joined: 09/15/2023
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SJ-Chris wrote:To add an extra battery, I converted (on Majestic 28a RVs) one of the small driver side compartments into a battery compartment. One battery fits with a little room to spare. I drilled some holes in the side of the compartment for ventilation. I also added some straps underneath and to the frame to give it additional support. With this, I was able to add a 2nd battery to my Majestics. No problems for several years so far.
I also have a 23' Class C RV. It came with 2 batteries in the entry step that I replace with GC 6v batteries. I notice that on this 23' RV I also have a small compartment on the driver's side that I have never used, but in theory it could be used for an extra battery. Maybe your 23' Majestic has a similar storage compartment you could convert.
Good luck!
Chris
Chris, I am looking to take possession of a 28a next fall, roughly Sept 15th. Yea I know, a long way out, but I have to clear the decks and it will take a fair bit of coordination. My sis lives in Mesa and so I want to buy through that location so I can fly out and observe the refurb, inspect it, fixing everything found etc.
With no ability to lay hands on one of these units I am a bit nervous.
Do you know where the original battery is located? Is it tight or is there a lot of room around it. I would like to replace the original with a 200ah lithium, or even 300ah if there is enough room. Likewise I'd love to get 800 watts of solar panels up on the roof before heading back home to NC. IIRC you put solar on your roof. It looks like a huge area back at the back of the roof. Any thoughts on these things?
JWColby54
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