China-based lithium-ion OEM Gotion has launched a 7MWh BESS DC block product and claims over 7GWh of deals already.
The company announced the new battery energy storage system (BESS) 20-foot DC block product, which uses its 650Ah large-capacity energy storage cell, at the Battery Japan 2025 show last month (19-21 February) where it exhibited both technologies.
Gotion has announced that it has signed sales framework agreements with several major energy firms, confirming cooperation plans for over 7GWh in orders.
Pursuit of Higher Energy Density Solutions
Gotion highlighted that its new product offers 40% more energy within the same space as a 5MWh system, resulting in a 40% reduction in footprint.
The drive for more compact energy solutions has been a significant factor in the BESS industry’s quest for increased energy density. Currently, a minimum of 5MWh per 20-foot container is required for competitiveness, though this isn’t the only influencing factor.
Larger battery cells have played a role in this trend, alongside the cost benefits that come with higher energy density. By packing more energy into a smaller space, projects can reduce the amount of cabling, power conversion system (PCS) technology, and balance of plant (BOP) equipment needed, leading to significant cost savings.
Fluence recently introduced a new product boasting an ‘industry-leading’ energy density. However, it features an integrated PCS and a different form factor, making direct comparisons challenging. Envision has also announced an 8MWh, 20-foot DC block.
Challenges of Increased Energy Density
Despite the advantages, higher energy density presents challenges. One common issue is logistics; for 5MWh and larger systems, 20-foot containers can become too heavy for standard roads and transportation methods. Solutions include using specialized equipment or shipping some modules separately for on-site integration.
Additionally, there are concerns regarding increased noise and fire safety. Fortunately, the technology to address these issues seems to be advancing in tandem with the growing energy densities.
