Gotion unveils 5 MW/18.8 MWh ensclosed battery storage system

Chinese battery manufacturer Gotion High-Tech has announced that its first Gotion Grid Gen2 high-voltage cascaded energy storage system, rated at 5 MW/18.8 MWh in a single cabin, has passed a scientific and technological achievement appraisal, earning an “international leading” designation.

High-voltage cascaded grid energy storage is a modular battery architecture in which multiple battery–inverter units are connected in series to collectively reach grid-level voltages, enabling direct connection to medium- or high-voltage networks without the need for a large central transformer.

Gotion’s new utility-scale system is described as a “three-phase, one-cabin” grid-forming architecture, meaning all three electrical phases used in standard AC systems are integrated into a single enclosure housing the batteries, inverters, and control systems. Operating in grid-forming mode, the system can actively establish and regulate voltage and frequency, rather than simply following the grid.

The platform incorporates phase-to-phase temperature control and balanced management technologies, achieving an energy efficiency of 92.1%. It is also equipped with an AI-driven intelligent operations and maintenance (O&M) platform that enables automated, proactive asset management and enhanced safety protection.

According to Gotion, with on-site certification now complete, the first product in this new series has moved beyond concept to become “validated, proven, and deployment-ready.”

“This milestone isn’t just about a product. It’s a blueprint for the next generation of energy infrastructure – smarter, more adaptive, and more resilient. And it’s already taking shape,” the company said.

However, a detailed technical specification sheet has not yet been publicly released, leaving several open questions – particularly around the logistics of transporting such a large system and its availability across domestic and international markets.

Gotion has already positioned itself as a leader in battery energy density. Its Gen1 Grid Series includes three products: the Gotion Grid 5 MWh system, featuring high energy density, triple-layer safety protection and and smart temperature control (≤3°C) in a standard 20-foot container. The Gotion Grid 7 MWh system offers ultra-high energy density (≥7 MWh) using 588 Ah high-capacity cells which boast an energy density of 416Wh/L, intelligent temperature control (≤3°C), and a footprint reduced by 25%.

At the top end of the portfolio is the Gotion Grid 20 MWh system – described as the world’s first 20 MWh PV storage solution with a 25-year lifespan. This product was first unveiled at SNEC 2025. It features hybrid air-and-liquid cooling, seven-level safety protection, AI-powered O&M for predictive maintenance, and a modular design that enhances scalability and space efficiency. At launch, Gotion reported receiving letters of intent from multiple customers totaling more than 3 GWh of capacity.