I would like to automatically protect my battery bank from charging below freezing.
I plan on using a switch and a diode. The diode would allow the battery to discharge only. The switch would be in parallel with the diode. The switch would open when battery temperature approaches freezing. (I’m spec’ing a 1000vdc 200a diode. battery bank has a main breaker 80a.)
I’d like to use a Victron Battery Protect 48|100 for the switch (BP). I would orient the BP so that flow is from charger towards battery. The DC system would always be able to draw from the battery and always receive charge power from the charger. (The charger is an all-in-one with inverter so it too needs to be able to draw from the battery on the same wire.)
START MAIN QUESTION
The manual for the BP forbids connecting a BP between inverter and battery with BP flow oriented away from the battery. It says that the capacitors in an inverter will trigger short-circuit protection in the BP and/or damage the BP. Does my planned arrangement avoid that possibility?
END MAIN QUESTION
Equipment:
- 3rd party, 4 battery bank (Eco-Worthy 48v 50ah “stackable” battery. Basic BMS, no communication, over/under volt protections only)
- 3rd party all-in-one mppt/charger/inverter (EG4 3000)
- 3rd party solar panels 420w 59.4voc in 3S
- Victron BMV-712 with temperature sensor
- VenusOS (Raspberry Pi)
I’m also open to suggestions for other relay-operated minimums 60vdc/100a switches.
Any help is appreciated.
