I got this info today from Battle Born Lithium Bsttery Mfg:
High temperature: > 135F The BMS will not allow a charging or discharging current.
Low temperature: < 25F The BMS will not allow a charging current. Charging current will be allowed again at 32F. We recommend not to use the batteries in temperatures under -4F
Cold weather storage
Storage temperature range -10F to 140F. We recommend bringing the battle born batteries to a 100% charge and then disconnecting them completely for storage. After 6 months in storage you should still have 75-80% charged batteries.
Storing batteries in subzero weather(-15 or more) has the potential to crack the abs and more importantly could causes a faster loss of capacity, in some cases drastically more than the typical 2-4% per month loss.
Charging our lithium batteries in cold weather
We have an adhesive backed heating wrap that runs off of a 12 v source and works very well. It has a temperature sensor that allows it to turn on at 34F and stays on until the temperature rises above 45F.
Heating wrap draws 30 watts/2.5-3 amps and is 3/16 of an inch thick.
And FWIW, this specific to my camper:
Compatibility has two sides, the power and voltage ratings of the batteries and the requirements and specs for whichever device you are using with the batteries.
Our batteries will allow 100 amps continuous, 200 amps for a 30 second surge and ½ second for higher loads.
Two of our batteries will give you 200 useable amps of power at 12 volts.
The inverter will run well off of any 12 volt source and our batteries are a superior 12 volt source. The charging side of your inverter can deliver 100 amps(which is just fine for our batteries) as long as the charger reaches anywhere from 14.2 to 14.4 volts. You said it was a programmable charger so this will not be a problem.
Your solar charge controller is compatible because it can be set to our charging recommendations:
Bulk/absorb 14.2 – 14.6 Volts
float 13.6 Volts or lower
No equalization(or set it to 14.4v), no temperature compensation and absorption time is 20 minutes per battery(if its an option).
Not sure about your PWM charger because we don’t have the specs, again the agm mode will work if its an option but if you give us the model # then we could look at the manual and check for compatibility.
Your progressive dynamics (9200 series) 45a converter is not made for lithium charging and it will only stay in the 13.6 volt mode because of the higher voltage of a lithium battery. The way around this is to manually put it into boost mode with the pendant. This will bring the charging voltage up to the 14.4 volts required to properly charge the batteries.
So compatibility is a two way street and the internal bms and the charging sources both have a role to play in this.
We would be happy to help with any other questions or clarifications on how our batteries or the charging methods work. Give us a call anytime and thanks again!