High Efficiency 125KW Hybrid Solar System Combined with Solis Inverter for Commercial Energy Storage System Solution

The 125 kWh high-voltage lithium battery pack (409.6V, 314Ah) is manufactured through a precise, multi-step process to ensure high safety, energy density, and long cycle life:

1. Cell Production:
   High-quality lithium iron phosphate (LFP) or NMC cells (typically prismatic) are produced via electrode coating, drying, calendaring, stacking/winding, electrolyte filling, and cell formation.

2. Cell Matching & Grouping:
   Cells are tested, sorted, and matched by voltage, capacity, and internal resistance to ensure consistency within each module.

3. Module Assembly:
   Cells are assembled into battery modules with mechanical supports, busbars, thermal pads, and voltage/current sensors. Each module is equipped with a local BMS.

4. Pack Integration:
   Modules are connected in series to reach the system voltage (409.6V). The battery pack is integrated with a master BMS, HV relay, fuse, current sensor, pre-charge circuit, and thermal management system.

5. Enclosure & Safety:
   The battery pack is enclosed in a fire-resistant, IP-rated cabinet or container, with built-in temperature sensors and overvoltage/overcurrent protection.

6. Testing & Calibration:
   The full pack undergoes insulation tests, performance validation, communication checks, and charge/discharge cycles before shipment.