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Changsha U1 Technology: Reliable Energy Storage for Commercial Use. High Energy Capacity: 836 kWh nominal capacity with 280Ah LiFePO4 battery cells. Long Cycle Life: Up to 8000 cycle charging life ensuring long-term reliability. Advanced Safety System: PACK level proactive warning and space energy storage fire safety solution. Efficient Cooling: Liquid cooling PCS method for stable performance in various temperatures. High Conversion Rate: Energy conversion rate is greater than or equal to 90%. IP55 Protection Grade: Robust all-in-one structure with IP55 shell protection grade. ISO9001 Certified: Manufactured under ISO9001:2000 certification standards.