Lifepo4 float setting?
I have not had to deal with a float setting so far with PWM controllers but I have a Victron 75/15 coming tomorrow and reading up on the settings,it is confusing especially the float setting..Some say...
Forum Discussion
I see The Trimetric (Bogart) FAQ has this: ( it still wants to use 2% but says nothing about the charging efficiency, which IMO it should. Limit absorb time to 20 minutes.
"Yes, the TM-2030 and SC-2030 will work with lithium batteries.
When used by itself in the stand-alone mode (no TM-2030 connected), the SC-2030’s AGM profile is very close to the profile widely recommended for lithium LFP batteries. The AGM profile is: Absorb stage at 14.3V and float stage at 13.2V.
When used with a TM-2030, set the following parameters:
Set “Absorb” voltage P1 = 14.4 Volts.
Set “Absorb current before float P2 = 2.0%
Set “Capacity” P3 = capacity of the battery bank.
Set User Level in P7 to L3
Set “Max Absorb time” P14 = 0.3 hours.
Set Finish Stage voltage P15 = 13.2 volts (not used for charging lithium batteries).
Set “float voltage” P16 = 13.2 volts.
Set Overcharge % P20 to 0% Set ‘Finish stage current limit’ P21 to 0%
Temperature compensation (recommended for lead acid batteries) are NOT be used for lithium. This means that you do not have to buy the optional temperature sensor and you should not connect it to the SC-2030 charger"
So you would think Victron would have similar advice.
For the OP, the recommended Float is 13.2 if that answers that question.
"Yes, the TM-2030 and SC-2030 will work with lithium batteries.
When used by itself in the stand-alone mode (no TM-2030 connected), the SC-2030’s AGM profile is very close to the profile widely recommended for lithium LFP batteries. The AGM profile is: Absorb stage at 14.3V and float stage at 13.2V.
When used with a TM-2030, set the following parameters:
Set “Absorb” voltage P1 = 14.4 Volts.
Set “Absorb current before float P2 = 2.0%
Set “Capacity” P3 = capacity of the battery bank.
Set User Level in P7 to L3
Set “Max Absorb time” P14 = 0.3 hours.
Set Finish Stage voltage P15 = 13.2 volts (not used for charging lithium batteries).
Set “float voltage” P16 = 13.2 volts.
Set Overcharge % P20 to 0% Set ‘Finish stage current limit’ P21 to 0%
Temperature compensation (recommended for lead acid batteries) are NOT be used for lithium. This means that you do not have to buy the optional temperature sensor and you should not connect it to the SC-2030 charger"
So you would think Victron would have similar advice.
For the OP, the recommended Float is 13.2 if that answers that question.
