I have a Quattro 15K inverter and Pylontech US5000 batteries connected to the Cerbo via communication cable. I am just wondering, what if the batteries are colder and the current output is limited to X amps as a result, and I turn on my heat pump or some other large load that requires 50X amps…what happens?
Does the Victron system shut down to prevent demanding too much current from cold batteries? Or do the batteries shut down to prevent too much current from being provided? Or is the current provided despite the batteries being too cold to provide it?
The BMS will kick in to protect the battery and block discharge, which will in turn take the inverters offline (low/no battery).
I would suggest you rather try automate to prevent this happening as that isn’t a good way to look after a hefty investment in batteries, nor for prolonging their life.
There have been posts over the years for how to keep batteries warm as well, which may be worth investigating.
I have my batteries in a root cellar underground inside an insulated shelf so it shouldn’t be an issue. Was just wondering. Going to switch my Cerbo OS to the version with Node Red so it will also operate heater pads if needed (they shouldn’t be needed though).