Fluence Energy has increased the storage capacity of its Smartstack battery energy storage system, now scalable to 10 MWh. The 10-MWh system joins the company’s existing 7-MWh offering.
Credit: Fluence
As the latest evolution of Fluence’s scalable, standardized platform, this new system delivers expanded capacity a while maintaining the electrical architecture, footprint and deployment model customers recognize across the Smartstack platform. Through an evolved pod design, the system increases capacity without expanding its physical footprint, achieving a core site-level energy density of ~680 MWh/acre (168 kWh/m²), positioning the system among the most density-competitive grid-scale storage solutions available in the market.
Smartstack 10 MWh has successfully completed large-scale fire testing, Fluence says, and its compartmentalized design limits thermal exposure, reinforcing containment and risk mitigation across the platform.
“Smartstack was built as a platform, and the 10-MWh system shows why that matters,” said Peter Williams, SVP and Chief Product and Supply Chain Officer, Fluence. “As battery technology, supply chains and local content requirements continue to evolve, customers need storage systems that can adapt without redesigning projects from the ground up. With Smartstack, Fluence delivers a scalable architecture — more capacity in less space, with the performance, safety, and service model they expect.”
To support long-term economic performance, Smartstack and Fluence OS are engineered as a unified hardware-software platform, enabling advanced controls, system-level optimization and portfolio visibility. Fluence’s 99.3% availability across reviewed fleets of 50 MW and above, per an independent review, provides the contractual confidence mission-critical deployments require.
Smartstack is commercially available for grid-scale applications worldwide, offering two-, four-, six- and eight-hour storage durations.
