Bring your Pylontech Battery back to life with this 1A Active Cell Balancer Kit — stop high-voltage alarms from taking your inverter offline.

This 1A Active Balancer retrofit kit is designed specifically for Pylontech US2000 / US3000 Type B / Plus batteries. It’s a simple plug-and-play DIY install, supplied with clear instructions so you can get your system running smoothly again.

If your battery is showing a red alarm LED, failing to reach 100% SOC, or suddenly dropping from 50% to 10% SOC, it’s almost certainly caused by cell imbalance. The factory-fitted BMS in Pylontech batteries only uses passive 51 Ω resistors for balancing — meaning it can take days or even weeks to correct a 100 mV difference.

This kit works alongside the built-in passive balancer, providing active 1 A energy transfer between cells for fast, precise correction. It comes complete with a Bluetooth monitoring module, allowing you to view live cell voltages and control settings directly from a free iOS or Android app. You can even set the balance start/stop voltage thresholds and monitor cell voltages in real time from your smartphone.

⚡ Active 1A Balancing: Real-time charge transfer between cells for tight voltage control and a healthy pack.
🔋 Extended Battery Life: Prevents stress and capacity loss caused by imbalance.
🧠 Smart Energy Shuttling: Transfers energy directly between cells — far more efficient than resistor-based passive balancing.
📱 Bluetooth Monitoring & Control: Free iOS/Android app shows cell voltage allows adjustable balance thresholds to be set/
🧩 Easy DIY Install: Plug-and-play design, no soldering required.
🛡️ Safe & Compact: Built-in overheat and reverse-polarity protection in a durable module.

Once installed the active balancer will automatically balance the highest or lowest cell and there is no need to consistently monitor the cell imbalance.  It will take a few charge cycles to reach an imbalance of <30mV.

Please contact us if you have any specific questions.  We also cell cell balancers for the US2000C and US3000C and US5000 models.

Installation Guide

Support Video 1

iOS App

Google Play App