Hi guys, please can some brain wave out there, tell me if I will have issues with storing my caravan with the solar charging the 2 x Lithium batteries, keeping them at 100%. I am told a number of things, like, : I should disconnect them when in storage for more than a month, another says, leaving them fully charge (constantly) while not drawing down on them is not good and will shorten their life spans.. Another says, its fine.... Can anyone out there with a good background in batteries please give some good advice.... Not that I am saying all the others were not good advice, but I need to be sure what i am doing here...
Peter_n_Margaret said
09:43 PM Sep 16, 2021
Best treatment is to discharge them to about 70% SOC and then disconnect all loads and charge sources.
Cheers,
Peter
Whenarewethere said
10:06 PM Sep 16, 2021
As said above.
Lithium is the opposite of lead acid. Don't store them fully charged & don't keep topping them up.
Branchie said
10:33 PM Sep 16, 2021
Thanks Pete... can you tell me what SOC is please...
gdayjr said
10:08 AM Sep 17, 2021
S state
O off
C charge
Peter_n_Margaret said
01:08 PM Sep 17, 2021
70% SOC = about 3/4 full.
Cheers,
Peter
yobarr said
04:22 PM Sep 17, 2021
gdayjr wrote:
S state
O off
C charge
State OF Charge.
Cupie said
05:11 PM Sep 17, 2021
An interesting discussion that got me thinking & doing a quick bit of google research.
-- Edited by Cupie on Friday 17th of September 2021 05:16:12 PM
Peter_n_Margaret said
06:35 PM Sep 17, 2021
I doubt if 40% or 70% makes much difference, just avoid "full" or "empty".
That Dakota mob are out on their own.
Cheers,
Peter
Tony LEE said
08:13 AM Sep 18, 2021
I would be inclined to use Peter's higher value simply because the natural self discharge plus the extra discharge due to internal bms can reach 5% per month so more than 50% leaves a bit more leeway
Hi guys, please can some brain wave out there, tell me if I will have issues with storing my caravan with the solar charging the 2 x Lithium batteries, keeping them at 100%. I am told a number of things, like, : I should disconnect them when in storage for more than a month, another says, leaving them fully charge (constantly) while not drawing down on them is not good and will shorten their life spans.. Another says, its fine.... Can anyone out there with a good background in batteries please give some good advice.... Not that I am saying all the others were not good advice, but I need to be sure what i am doing here...
Cheers,
Peter
As said above.
Lithium is the opposite of lead acid. Don't store them fully charged & don't keep topping them up.
Thanks Pete... can you tell me what SOC is please...
S state
O off
C charge
Cheers,
Peter
State OF Charge.
An interesting discussion that got me thinking & doing a quick bit of google research.
I found a comment on a commercial & relatively recent 'US Chemical Storage' site https://www.uschemicalstorage.com/how-to-store-lithium-batteries/
Nickel and lithium-ion batteries should be stored at around 40% state of charge.
Fortunately for my peace of mind it also says that Lead Acid batts should be stored at 100% as I have always been told.
Other related sites also stated 40% too as does 'The Battery Guy'
I'm not suggesting that 70% is wrong but note the difference. What's your source Peter?
Given that I'm unlikely to go down the Lithium Iron path it is only of passing interest to me.
edit .. I've just got to stop doing this .. Just had a look at another site before I deleted the search and got this confusing (to me anyway) article from a manufacturer https://dakotalithium.com/2018/12/14/how-to-store-a-12v-lithium-battery/
-- Edited by Cupie on Friday 17th of September 2021 05:16:12 PM
That Dakota mob are out on their own.
Cheers,
Peter