CESC Debuts Mercury 418 All-in-One C&I Liquid-Cooled BESS at Intersolar Europe 2026, with Industry-First 800V Direct-Connect Architecture

CESC unveiled the Mercury 418 All-in-One C&I liquid-cooled battery energy storage system (BESS) at Intersolar Europe 2026. Built around an industry-first 800V direct-connect architecture, the Mercury 418 reduces transformer costs and simplifies on-site grid connection for commercial and industrial developers.

Most commercial battery systems require a transformer to interface with the grid, adding cost and complexity to every project. The Mercury 418’s 800V direct-connect architecture reduces transformer costs and simplifies system integration, easing the path to interconnection.

The system delivers 418 kWh of usable capacity in a compact, liquid-cooled design built for commercial and industrial energy demands. It scales to 8.36 MWh across 20 units, giving operators the flexibility to grow with their needs, and is rated for 10,000 cycles for long service life and dependable performance across high-utilization applications.

The Mercury 418 reflects CESC’s broader technological approach, which integrates battery energy storage, proprietary AI-driven Energy Management Systems (EMS), and digital twin technology into a single platform.

Visitors can see the Mercury 418 at Intersolar Europe 2026 in Munich, June 23–25.