I have a Lynx Smart BMS and distributer with LifePo4 and I’m wondering where the best place to connect the bilge pump is.
Before the Smart BMS to guarantee it always works?
Worried that it can then run the battery dead.
asked
Automatic Bilge Pump
You could connect the bilge pump to the AUX terminals. This would require a relay as the AUX terminals max. amperage is 1.1A.
But in case the Lynx Smart BMS opens the contactor (OFF mode) for whatever reason (low cell voltage, user turned the LSB manually off), the AUX output is turned off as well.
I am a boat owner myself and have connected my bilge pumps directly to the battery positive terminal just in case. My bilge pumps protect my ship (not my batteries), which value exceeds that of lithium smart batteries by far.
Sizing of my battery system takes bilge pumps into account and ensure they are are running for at least 48 hours continuously. Enough time to take action.
Before the Smart BMS to guarantee it always works?
This will not guarantee that the pump will always work.
When the battery is empty, it's empty no matter where you connect the pump.
