Litime smartsolar battery .

[col-man solar]

Recently bought a litime 100 amphr smartsolar battery for my camper.When I first got it i charged it to 100 % with the litime 20 amp charger and then installed it in the camper and ran it down to 40% and let my victron 30 mppt charge controller to charge it back up when it gets to 100% charge the BMS activates and says overcharge protection and starts to balance cells .I've tried alot over the last two weeks with info from litime on troubleshooting but no matter how I charge it ,either the litime 20amp charger or the 30 amp mppt victron or the camper lithium converter as soon as it hits 100 percent it activates the bms and says overcharge protection and balances the cells .Is it safe to continue to use the battery even if the bms is activated .when it reaches 100% says 14.2 volts on the Bluetooth app..

 

[HighDesertOffgrid]

Recently bought a litime 100 amphr smartsolar battery for my camper.When I first got it i charged it to 100 % with the litime 20 amp charger and then installed it in the camper and ran it down to 40% and let my victron 30 mppt charge controller to charge it back up when it gets to 100% charge the BMS activates and says overcharge protection and starts to balance cells .I've tried alot over the last two weeks with info from litime on troubleshooting but no matter how I charge it ,either the litime 20amp charger or the 30 amp mppt victron or the camper lithium converter as soon as it hits 100 percent it activates the bms and says overcharge protection and balances the cells .Is it safe to continue to use the battery even if the bms is activated .when it reaches 100% says 14.2 volts on the Bluetooth app..

Balancing is normal and necessary behavior. Allow the balancing cycle to complete it should happen within a couple of hours.

 

[col-man solar]

Balancing is normal and necessary behavior. Allow the balancing cycle to complete it should happen within a couple of hours.

I understand it's normal but happens everytime.and is it ok to keep connected or will it damage something. If it didn't have Bluetooth yu wouldn't know because the battery still supply voltage.

 

[HighDesertOffgrid]

I understand it's normal but happens everytime.and is it ok to keep connected or will it damage something. If it didn't have Bluetooth yu wouldn't know because the battery still supply voltage.

If your charger is properly configured it should drop to a lower voltage after balancing. Is this happening?

Thread 'BMS Function for Dummies (A layman's guide to what they do)'

Sep 3, 2025

I don't see anything pinned or featured. If this already exists, link in the comments and I will delete the following.
There are more folks added daily with extremely limited knowledge of systems or general electrical understanding. As a basic overview of what the BMS does, I have the following understanding.

Under voltage protection- Stops discharge from the battery to limit cell damage but allows current into the battery. (Based on lowest voltage cell)

Under Temperature Protection- Interupts charging below a set temperature ('0c') to limit cell damage but allows discharge from the...

• HighDesertOffgrid
• Replies: 0
• Forum: BMS (Battery Managment Systems)

 

[col-man solar]

Yes it does drop to 13.4 volts ,im just curious about safety everything you see says to disconnect battery if the bms activates in an overcharge condition ,not easily done in a camper and i would have to be monitoring it all the time .

 

[oldnavy]

Yes it does drop to 13.4 volts ,im just curious about safety everything you see says to disconnect battery if the bms activates in an overcharge condition ,not easily done in a camper and i would have to be monitoring it all the time .

Does this overcharge protect condition inhibit DIScharge as well as charging?

 

[HighDesertOffgrid]

What are the charge settings on the victron you are using?

 

[col-man solar]

Does this overcharge protect condition inhibit DIScharge as well as charging?

No still discharges

 

[col-man solar]

What are the charge settings on the victron you are using?

 

[HighDesertOffgrid]

Your absorption time is fixed at 8hrs.

 

[col-man solar]

That's what litime said to set it too,are u in disagreement??

 

[HighDesertOffgrid]

That's what litime said to set it too,are u in disagreement??

Yes. Holding at over 14v for 8 hours is not good. If you charge daily, 1 hour or less should suffice.

 

[col-man solar]

It doesn't hold over 14 volts it drops to 13.5 13.4 after an hour or so ,still not on topic ,even if this is charged with the litime 20 amp charger, or the camper converter, battery still activates BMS and balances cells

 

[HighDesertOffgrid]

,still not on topic

?

 

[ToolMan1]

IMO Since voltage is not held at an undesirable level for extended periods of time, I can't think of this having any negative impact on battery. If for some reason it frequently cycled for short periods of time, in this condition, then I would start asking if it is OK. On the other hand, within reason, this actually could be a good thing, as BMS keeps working to balance a high voltage cell.

It sounds like one or more cells is over desirable voltage while charging and the battery is not balanced. OP likely knows this. Since app shows up to 14.2 volt while your battery is charging and charge voltage on Victron charger is 14.4 v, the cell balance is not far off.

LiTime charger charges at 14.6V, while this maybe tolerable, it is more likely to trip over voltage condition. It would be better if it was 14.4 -14.5V, and 14.4-14.45v being even better.

To give more time for BMS to balance cells, which may start balancing around 13.7/13.8V, if needed (will see on app), charge at a much lower current if possible or at maybe 14.2 or 14.3V. If you have a power supply to charge battery, set the current to .5A and voltage limit to 14.2 or 14.3V. I am guessing here, but do this for up to 1 hour after battery app is showing your voltage limit. If it BMS hits over voltage condition, let BMS cool and repeat as needed.

Added: Waiting to cool also gives BMS time to continue to balance battery (I see balancing when charging is off, as low as 13.6V).

When no over voltage condition occurs when battery voltage limit is then set at 14.4V, cells are well balanced. If this is not possible, after many attempts, then one or more cells or BMS has a problem. When getting back to LiTime, show a video of your problem and your settings.

If battery is OK, over voltage condition is unlikely to recur when charging with Victron mppt, unless it has not been charged for a significant period of time.

 

[ToolMan1]

It doesn't hold over 14 volts it drops to 13.5 13.4 after an hour or so ,still not on topic ,even if this is charged with the litime 20 amp charger, or the camper converter, battery still activates BMS and balances cells

Was my reply in post #15 helpful? Did you resolve issue?

As OP may have said, most LiTime batteries in field do not have Bluetooth so they do not know if and when they go in over voltage mode. It has to happen a lot and if BMS is durable enough, it may not be an issue.

 

[col-man solar]

On a camping trip for lst two weeks was monitoring the bms and it seemed to not always activate at full charge or not as frequently, can't tell what's going on anymore because the Bluetooth feature has shopped working ,will troubleshoot shoot some more when I get home.