Gobel Power Project X LiFePO4 Battery DIY Kit

The kit includes the JK BMS 200A (V19) — a smart inverter BMS with:

• Real-time monitoring of cell voltage, current, and temperature
• 2A active balancing built in, keeping every 314Ah cell matched cycle after cycle
• Bluetooth app access plus CAN / RS485 / RS232 ports for inverter communication
• Optional heating pad (+¥68.30) for cold-climate charging

Please note: JK BMS firmware and software are developed and maintained entirely by JK. As the hardware integrator, Gobel Power cannot be held responsible for firmware/software behavior, though we will report any issues to JK and request updates. If you prefer fuller firmware support, consider our PC200 BMS DIY kit.

The GP-PROJECT-X1 is built around two safety-and-longevity features that many DIY cases skip:

• Adjustable cell compression: prismatic LiFePO4 cells swell and contract over their cycle life. The Project X frame applies and holds compression on the 16-cell stack (the clamp specification calls for about 300 kg of force), which controls swelling, maintains internal contact, and helps extend cycle life. The compression is adjustable so you can set it correctly for your 314Ah cells
• Anti-flame ABS transparent case: fire-retardant material with a transparent design — you can visually inspect cells, busbars, and wiring at any time without opening the case

Overcurrent protection is covered too: choose the 2P100A circuit breaker (200A total) or a Class-T 250A fuse breaker, both integrated into the kit.

The JK BMS 200A supports CAN / RS485 / RS232 communication, so the finished 51.2V battery integrates with mainstream hybrid solar inverters in lithium battery mode (Deye, GoodWe, Growatt, Victron, Solis, Luxpower and more).

No BMS communication input on your inverter? Set it manually in lead-acid mode:

• Max charge voltage: 55.2V (3.45V per cell)
• Max charge current: 150A
• Max discharge current: 200A

The BMS keeps providing overcharge, over-discharge, and short-circuit protection either way. When running multiple packs in parallel, use only the same capacity and cell version, and do a full charge to 100% at least monthly to keep SOC readings accurate.

Assembly: the Project X is known for its transparent case and easy assembly — the frame, compression plates, busbars, and breaker mount step by step, and a step-by-step assembly manual is included in the related downloads. Only basic electrical safety knowledge is needed. Footprint is 820 × 695 × 245 mm.

Warranty:

• Cells purchased for the kit carry a 10-year warranty; the BMS carries a 1-year warranty (hardware only)
• 30 days free return to the local warehouse

Delivery:

• Ships from the China warehouse in 50–60 days; spare parts ship faster via UPS/DHL
• Sea freight with tax already paid — free tax to your door