CORNEX displayed its M6 BESS series 6.262 MWh DC storage system without an integrated PCS
Its 588 Ah LFP cells have a maximum energy efficiency of 96.5%
The company says that the BESS is ready for mass production
CORNEX NEW ENERGY CO., LTD., a China-based battery energy storage system (BESS) provider, highlighted its latest M6 BESS series model without an integrated power conversion system (PCS) at Intersolar Europe 2026.
Measuring 6,058 × 2,438 × 2,896 mm (W × L × H), this BESS is equipped with 588 Ah lithium-iron-phosphate (LFP) based cells and connected according to the company’s proprietary CTP (cell-to-pack) technology. Unlike the conventional battery pack-based cell layout, where each pack consists of an equal number of cells, this technology directly connects all cells into a single pack at the system level. Each prismatic cell has an energy efficiency of up to 96.5% with a gravimetric energy density of 190 Wh/kg, which is the maximum amount of energy per unit battery cell mass. These also have a guaranteed life of more than 12,000 cycles (charging/discharging), ensuring long-term service life. Together, these advantages result in a cumulative storage capacity of 6.262 MWh at a full-load power output (DC) of 1.565 MW within a standard 20-ft container. It can provide an energy backup period range of 2 or 4 hours, depending on the external PCS’s capacity.
For Europe’s operational challenges, its battery thermal regulation is based on a circulating liquid coolant that absorbs heat from the battery cell surface and cools itself via a heat exchanger or chiller for reuse. According to the company, it helps maintain the system’s operating temperature below 35°C. The system has a rated operational temperature range of -33°C to +55°C without failure. The company added that the liquid-cooling system can warm the battery cells in freezing environments, ensuring stable battery performance.
CORNEX says the product is ready to enter mass production.
