BEP Distribution Cluster f/Single Engine w/Two Battery Banks [714-140A-DVSR]Distribution Cluster for Single Engine with Two Battery Banks The 714 140A DVSR uses a dual sensing DVSR (710 140A). This system ensures that you will always have a fully charged reserve battery. When the switch is in position one, battery one becomes the sensing battery for the VSR. Battery two, which is in isolation, is charged through the VSR when the engine is running to ensure that it is always fully charged. When the switch is in position two,