Victron Energy Smart BMS CL 12-100This is a replacement for the older 12 200 BMS and represents a considerable upgrade on the concept. The main change is that this operates on the positive side of the circuit which makes life a lot easier, especially for marine applications. You can use it with any MultiPlus by connecting it (with a special cable) to the remote on off switch of the MultiPlus. This greatly simplifies installation as no special programming of the MultiPlus is required.