roaringgirl
Well-Known Member
I'm considering wiring a large relay into the charger output so that the BMS can shut it off. Does anyone know what happens if a Victron Phoenix Multiplus charger is suddenly disconnected from the battery, mid-charge?
LiFePO4 BMS disconnect of shore charger
- Thread starter roaringgirl
- Start date
vas
Well-Known Member
what BMS?
would be much smoother to have a BMS that supports victron canbus connection and then it instructs the multiplus to stop charging (drop A first, then iirc stops completely)
alternatively, and much cheaper to wire a switch to the REMOTE switch of the multiplus so that you can turn off the charger. Check the manual, dead easy, no high currents involved.
edit: finally, if you configure the multi properly, it would stop charging when voltage is set (voltage must be lower than you'd normally think) doesn't save you in case of imbalanced cells though, so BMS input in the process is necessary imho
V.
would be much smoother to have a BMS that supports victron canbus connection and then it instructs the multiplus to stop charging (drop A first, then iirc stops completely)
alternatively, and much cheaper to wire a switch to the REMOTE switch of the multiplus so that you can turn off the charger. Check the manual, dead easy, no high currents involved.
edit: finally, if you configure the multi properly, it would stop charging when voltage is set (voltage must be lower than you'd normally think) doesn't save you in case of imbalanced cells though, so BMS input in the process is necessary imho
V.
Travelling Westerly
Well-Known Member
If it helps any
My Victron Phoenix 50a smart charger (separate to my Victron inverter) is often disconnected by my BMS, admitted not during a full 50a bulk charge stage though.
The BMS usually trips due to a single cell high voltage runner reaching its trip point. This mostly happens when the charger is ramping down during the "float" (not really floating Lifepo4 but that's what it is called on the charger) stage.
Nothing detrimental has happened to the charger and others have asked the same question on the Victron forum with regards to both the mains chargers and the solar chargers.
Not sure if that answers your question?