Victron Settings for KS Energy

[M1EWK]

Just had a KS Energy C210 lithium battery fitted, fed by a Victron Mppt solar controller and Victron Orion dc-dc (30a) charger. I've set both of these to the Lifepo4 setting but noticed that both of these carry on charging in bulk mode long after the battery bms shows 100% SOC. They eventually get to ABS mode but not sure if this is likely to cause a problem with overcharging. Anyone got anything similar ?

 

[Pausim]

Just had a KS Energy C210 lithium battery fitted, fed by a Victron Mppt solar controller and Victron Orion dc-dc (30a) charger. I've set both of these to the Lifepo4 setting but noticed that both of these carry on charging in bulk mode long after the battery bms shows 100% SOC. They eventually get to ABS mode but not sure if this is likely to cause a problem with overcharging. Anyone got anything similar ?

With LiFePO4 batteries If the Amps are still going in the battery is not full, the SOC figure may be a bit out of step but should synchronise with time. If the Amps have stopped flowing but the Voltage has remained at bulk charge level then the charger/solar controller settings are at fault. The LiFePO4 bulk charge phase should end when the tail current drops below a preset level, 2% of the battery capacity is the default setting on one of my devices.

A month on I hope you have already found your answers elsewhere, sorry I didn’t spot your post earlier.

 

[Reevsie]

I have has Lithium's for over a year now. When it reaches 100% SOC the batteries keep on charging Eventually going to Bulk then settling down to float.

One thing I have learned is that the SOC % is more of a guide and never totally accurate. After a good full charge I calibrate, but over time it becomes less accurate. I only now ever use the Voltage to get a more accurate reading.

 

[poppycamper]

I have has Lithium's for over a year now. When it reaches 100% SOC the batteries keep on charging Eventually going to Bulk then settling down to float.

One thing I have learned is that the SOC % is more of a guide and never totally accurate. After a good full charge I calibrate, but over time it becomes less accurate. I only now ever use the Voltage to get a more accurate reading.

Interesting, how do you use voltage of a lithium battery to gauge SOC?

 

[Lenny HB]

only now ever use the Voltage to get a more accurate reading.

Not possible to get an accurate state of charge with voltage.
The only proper way is by measuring current in & out with a shunt.

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[Pausim]

I have has Lithium's for over a year now. When it reaches 100% SOC the batteries keep on charging Eventually going to Bulk then settling down to float.

One thing I have learned is that the SOC % is more of a guide and never totally accurate. After a good full charge I calibrate, but over time it becomes less accurate. I only now ever use the Voltage to get a more accurate reading.

A lithium profile should go straight to off or the maintenance/float level when full. It is full when the current flow drops off which is easily detected by a properly set charger.

 

[M1EWK]

Thanks all. I had assumed that the SOC on the BMS was the oracle so to speak. I haven't used the van it for a while but will try driving for a while and see if the b2b eventually gets to float. I don't have a lithium mains charger but might be worth getting one I suppose.