DC Voltage Monitoring Relay for Under-/Over-voltage

[@adamsisernik4556]

I have two batteries, Basen Green 11.7kWh 51.2V (BG) charges the 48V Ecoflow Delta pro inverter (DP) via XT60 input. With DP I can't set BG as not to empty itself completely! What or how could I do to prevent BG from draining to 0% ? Would be such DVRD Voltage Monitoring Relay DC 12V / 24V / 36V / 48V Surge and Undervoltage Protection Relay (DC48V) suitable for install between my batteries?

[@xtiandxb2246]

Is there wiring demo for that device?