Pytes Battery Control Unit, Pi LV1 Series (BCU), System-Level BMS Master Controller, For Use With Pytes Pi LV1 Battery Modules (SKU: PYTPILVBMU), Manages SOC Balancing, Charge/Discharge Control, and Inverter Communication, CAN / RS485 Communication to Inverter, Required for All Pi LV1 Battery Stack Installations. The BCU coordinates all connected Pi LV1 BMUs into a unified, inverter-compatible battery system.