This VC1 allows use of the original Valence bms that is built into each of the Valence U27-12XP batteries we stock. This unit is the Master that controls each of the on-board slave units. Only one is needed for each group of batteries wired together. The VC1 plugs in to the existing Valence multipin connector. This unit can disable charging and loads if voltage or temperature limits are reached for individual cells within each module. The VC1 also automatically initiates module level cell balancing, but not inter-module balancing (between modules). See manual for details.
The VC1 comes with initial module settings pre-configured, but final setup is required to allow the VC1 to communicate with your battery modules. See the manual for details.