Is Your Power Inverter Compatible with Our AmpBox (JK-BMS v19)?
Choosing the right inverter for your DIY solar or energy storage project can be tricky — especially if you’re using our AmpBox with JK-BMS v19. Compatibility depends on more than just voltage; it’s about communication, protection, and performance. This guide will help you understand the JK-BMS, how it works, and how to check if your inverter is a good match.
What Is the JK-BMS and What Does It Do?
The JK-BMS (Battery Management System) is the “brain” of your lithium battery pack. It protects, monitors, and optimizes your cells so they last longer and perform safely. Unlike basic BMS units, the JK Inverter Edition (v19) includes advanced features like:
- Active Balancing – Redistributes charge between cells, keeping them even and maximizing usable capacity.
- Multiple Communication Ports – CANbus, RS485, UART, and Bluetooth for flexible integration.
- Customizable Parameters – Easily set voltage cutoffs, balancing thresholds, and protection limits via the app or PC software.
- Inverter Integration – Designed to connect directly with supported inverters for real-time control and monitoring.
Example of JK-BMS v19 with multiple communication ports
Why BMS–Inverter Compatibility Matters
When the BMS and inverter “speak the same language,” they can work together to:
- Share state of charge (SOC) and temperature data in real time.
- Adjust charging current and voltage dynamically.
- Prevent overcharging or deep discharging.
- Extend battery lifespan while keeping your system safe.
Without communication (called open-loop), the inverter charges based on fixed voltage limits only. This works, but it’s less precise and can lead to harsher battery cycles.
Closed-loop vs. Open-loop operation
Steps to Check Inverter Compatibility
1. Identify Your JK-BMS Model
Only “Inverter Edition” JK-BMS models (like v19) support communication. Look for multiple RJ45 ports labeled CAN or RS485.
2. Check for Matching Communication Ports
Ensure both your inverter and BMS have compatible ports. Most modern inverters use CANbus or RS485. Confirm pinout diagrams in the manuals.
3. Verify Supported Protocols
This is the most critical step. Even with matching ports, your inverter must support the same communication protocol as the JK-BMS. Common compatible brands include:
- Growatt
- Deye / Sunsynk
- Victron Energy (with GX device)
- EG4
If your inverter isn’t listed, advanced users may use a protocol translator (e.g., ESP32-based solutions).
4. Confirm Voltage & Current Ratings
Check that your inverter’s input voltage matches the battery system (e.g., 48V) and that the inverter’s charge/discharge current does not exceed the BMS rating.
5. Configure Inverter Settings
On the inverter side, set battery type to Lithium or select a supported protocol (e.g., Pylontech, EG4). Without this step, communication may not start.
Compatibility Checklist
| Aspect | What to Check |
|---|---|
| JK-BMS Model | Does it say “Inverter Edition” (e.g., v19) with CAN/RS485 ports? |
| Communication Ports | Do both devices have matching CAN/RS485 ports? |
| Protocol | Is your inverter brand supported in the JK-BMS app? |
| System Voltage | Does the inverter accept the battery pack’s nominal voltage? |
| Current Rating | Do inverter charge/discharge currents stay within the BMS’s rating? |
| Settings | Can the inverter be set to Lithium or a specific BMS protocol? |
Best Practices for a Reliable Setup
- Start with Open-Loop – Test your system with basic voltage cutoffs first, then enable closed-loop communication.
- Use Verified Cables – Improper RJ45 pinouts are a common cause of communication issues.
- Update Firmware – Keep both your JK-BMS and inverter firmware up-to-date for the latest protocol support.
- Monitor During First Runs – Watch temperature, SOC, and charge/discharge behavior carefully at startup.
Our AmpBox with JK-BMS v19 ensures safer, smarter energy storage for your projects
Final Thoughts
The JK-BMS v19 is a powerful tool for DIY solar and storage projects, but to unlock its full potential, it must be paired with a compatible inverter. By checking model, ports, protocols, voltage, and current ratings, you can confidently design a system that runs efficiently and safely.
Ready to build? Explore our AmpBox lineup and get started with smarter energy storage today.