I am using a BP100 programmed in lithium mode to connect and disconnect my PV array from my non-Victron MPPT solar charger. My BMS control, which sync' voltage to ground, is controlling a small SSD coil. The output of that SSD is the 12vdc applied to pin 2.1 on the BP100. When my BMS tuns off its charge enable relay I am able to confirm the SSD relay turns off as well. However my solar charger display panel still indicates that it is charging my lithium pack. With a volt meter I measure no potential across the BP100 source/load posts. In short with pin 2.1 12vdc source removed the load is not being disconnected. It is my understanding that the the BP100 will not allow back feeding.