Heated battery with internal BMS
I have victron system, cerbo, couple of mppt's, multiplus and lynx shunt and distributor. Before I used AGM batteries, and have now switched to a heated 310Ah 12V LifPo4 battery. I decided to go with a heated battery since I am located above the arctic circle and during winter we have long periods of below -10 degrees Celcius.
I was last summer I installed the new battery and made sure I put in all the correct parameters of the battery into my system. My issue is that the shunt pretty soon miscalculates the SOC because some of the power from my PV system is used to warm the battery without the shunt recognizing this. Is there some settings i could tweak for this, or would I be better of using the internal BMS of the battery to monitor SOC?
And if I use the battery internal BMS, would I really need to buy a specific ethernet cable from battery manufacturer or could I use a regular CAT cable from the "cable-drawer" in the attic?
thanks in advance.