BMS Board Set CMU and PMU for US2000B US2000B Plus Phantom-S | Pylontech

This is a genuine Pylontech replacement BMS board set for the earlier US2000B, US2000B Plus and Phantom-S 48V lithium batteries. Both boards that form the battery management system come together: the CMU control and monitoring board and the PMU power board. A module that has stopped communicating, refuses to switch on or reports a BMS fault can often be repaired with this set. That keeps its healthy cells working in a home energy storage or off grid system, at far less cost than replacing the whole battery.

Pylontech BMS board set: key features

• Genuine parts: Pylontech boards, not aftermarket copies.
• Two boards: CMU control board and PMU power board supplied together.
• Direct replacement: fits in place of the original BMS in US2000B, US2000B Plus and Phantom-S modules.
• Communication: RS485, CAN and RS232 ports on the CMU.
• Condition: new.

How the two boards work

The CMU (control and monitoring unit) reads cell voltages and temperatures and runs the protection logic. It also talks to the inverter and to the other modules in the stack over RS485 and CAN. The PMU (power management unit) carries the main battery current and switches the module on and off when the CMU tells it to. Either board failing can leave a module with perfectly good cells unusable. Fitting both at once means the repair never relies on an old board that may also be damaged.

Compatibility

This set suits the US2000B, US2000B Plus and Phantom-S only. Unsure which battery you have? Send us a photo of the battery label and serial number and we will confirm before you order.

Board details

Who it is for

Workshops and technicians looking after legacy US2000B, US2000B Plus and Phantom-S installations. Correctly fitted, the set lets a faulty module rejoin its existing battery stack in a home storage or off grid solar PV system. Our UK team offers technical support before and after purchase.