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Battery storage months at a time

Jason flores

New Member
Joined
Nov 4, 2023
Messages
40
Location
Las vegas nv
All of our components will be in our connex we want to drive up in our rv plug & play (hopefully) but my question is when we leave for months at a time what do we do with the batteries ?
Leave at full charge ?
Leave in a "storage mode"
They are eg4 48v 100ah is there any draw (parasitic draw) on the lifepo4 batteries when not on use . Is this possible ?

Thanks
 
I could not find an answer. My six months of storage is in the heat at 105f battery temp.

I store at 50% SOC, disconnected and no lauds, and don’t touch it until the cooler months and then charge to 100%.

Proper answer is remove and store in a climate controlled environment, but that has its own issues.
 
Hi, if you need to leave the batteries for months, you'd better charge them to 80% and leave them for less than 2 months. Good maintenance of battery needs you charge it every 2 months to prevent it from complete death. You can also find solar trickle charger online to protect the batteries if you will leave them for a long time.
 
Good maintenance of battery needs you charge it every 2 months to prevent it from complete death.
I’m not sure trickle charging is correct if lithium batteries are to be stored for long periods of time, especially if the temps are below freezing where harm occurs to cells.

I would like to see what a manufacturer recommends in their manual or spec sheet. Long term storage in heat, which is where I store mine, is not included in the EVE 280 ah info.
 
They are eg4 48v 100ah is there any draw (parasitic draw) on the lifepo4 batteries when not on use
Normally the parasitic draw is insignificant for a disconnected battery and only is the BMS and Bluetooth connected. In my documentation for the OVERKILL BMS it states insignificant, but does not give a amperage draw.

I had my batteries stored at 50% for six months and did not notice any draw when I took it out of storage.
 
Agree, at "sensible" temperatures the self discharge will be zero or almost zero for all practical purposes.

I have had great success with long term battery storage of many battery types by charging up to about 80% then disconnecting the battery.
When the disconnected battery voltage has fallen by some amount (?) charge back up to 80%.
This works especially well for very infrequently driven vehicles.

This will cycle, and depending on battery type, age, and condition and the environment, it might cycle every few weeks, or months, or maybe never....

Whatever monitors the battery and does the switching can be externally powered, perhaps from just a single solar panel, and need not be powered continuously 24 hrs per day.
 
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