I have 6 YIXIANG V2 DIY BOX JK BMS 200A 15KWH 16S 280ah, and 2 YIXIANG V1 DIY BOX's.
I really like the improved quality and safety improvements in the version 2 box. I plan to add a third battery bank (4 diy boxes) in the future. My 3 EG4 6000XP’s have no issues charging the batteries with 40 400w bifacial solar panels. I run the batteries as lead-acid mode via the setup for my 6000XP’s.
I purchased my Grade A EVE LF280K cells from DOCAN POWER (Amy) & HAKADI Battery (Jacob). I purchased the Yixiang 280Ah DIY battery kit from Shenzhen Yixiang New Energy Co., Ltd. (Miaoxin Tie).
Due to Trump’s tariff’s, I no longer must wait on the slow boat from China. You can now request the “American Warehouse” for batteries and the dyi Box’s for super-fast deliveries.
One con is neither version is UL-certified so check local codes for permitted systems. I have all my solar equipment located in my barn and my panels are all ground mounts to allow for a hybrid battery backup solar system to power my home's loads off grid.
Another con for me is the Yixiang battery positive and negative posts are reversed for V1 and V2 causing some unique wiring for one of my battery bank. .
Key Improvements from Version 1 to Version 2, according to the company.
- Includes an integrated aerosol fire extinguisher that activates automatically in case of thermal runaway or overheating.
- Adds a bidirectional DC circuit breaker (e.g., 250A with 50kA breaking capacity) for safer on/off switching and fault isolation.
- Upgraded JK V19 BMS series with enhanced 2A active balancing, better inverter communication (e.g., 100% compatibility with mainstream brands like Growatt or Victron), and a new glass-panel touchscreen for clearer real-time monitoring (voltage, temp, SOC).
- Enhanced side ventilation holes and larger top BMS compartment for better airflow; optional active cooling integration.
- Improved internal layout for easier cell access (less removal of components); upgraded castors with brakes; available in grey color for aesthetics. Optional roller base for stacking up to 4 units.
- Performance Impact: Both versions support ~14.3kWh capacity with 280Ah cells and 200A continuous discharge, but V2's upgrades (e.g., better BMS balancing and cooling) can yield 10-15% more usable capacity over time by minimizing degradation. It's compatible with inverters for seamless solar integration.