William_H
Well-known member
I don't know the BEP VSR but typical VSR has a relay coil which operates the make contacts. The relay coil is driven by the sensing circuit. Now it does seem that the sensing circuit on OP VSR has dies in operate mode. Which means the coil current is draining at all times. The coil current is dependent on the size of the relay and has to be significant to operate a relay capable of handling starter motor currents. (hundreds of amps) So despite Little sister assertions I think the coil current could kill both batteries over a long period. So 10 days is 240 hrs so a coil of .5 amp drain would take 120 amp hours enough to kill to 110AH batteries if they are a bit tired. Even at .25 amp drain the 60 AH drained could kill old batteries. So can anyone tell use the current drain when relay is activated? These kind of currents would be significant to a small solar charging set up. VSR should be on load side of isolation switches. ol'will