BMV712 controlling a Critical Load Panel

DIY
, ,
1

I would like to use my BMV712 programmable relay to disconnect a 240V 100A Load Center in order to prevent heavy loads (electric Dryer, Air Conditioners, etc) from draining the battery below 25%. I am using a 80kWh 48Vdc battery bank with a Schneider 6848 Inverter to power an off-grid home with a single 125A 120/240Vac SquareD Load Center. One thought was to place my ‘heavy loads’ like the air conditioners in a second 100A Load Center, and disconnect this load center using a contactor (NC 100A AC relay) that is controlled by the programmable relay on the BMV712.
My questions are:

  1. Is this a common practice? What are some better ways to do this?
  2. What are the power specs of the BMV 712 relay such that I can appropriately size my contactor?
  3. What specific contactor would you recommend for this situation?

Thank you, Victron community!

2
  1. Yes it is common to use the Victron programmable relays to drive a larger contactor / relay / solud state relay.
  2. The specs of the BMV712 relay will be in the datasheet and the manual, they are quite limited. However, see the FAQ linked below, many people have damaged relays by using inappropriate devices.
  3. No idea.
3

thank you!