The new system delivers expanded capacity and industry-leading site-level density while maintaining the electrical architecture, footprint, and deployment model customers rely on 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 also has increased safety built into it. The 10 MWh system has successfully completed Large-Scale Fire Testing (LSFT), and its compartmentalised 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.”
The release marks another advance for Smartstack as a future-ready, configurable platform. In a market where cell chemistries and local content regulations shift rapidly, standardising balance-of-plant infrastructure allows customers to adopt newer, higher-capacity components without resetting development cycles or introducing execution risk - a critical advantage for independent power producers, utilities, and data centre developers where maximising capacity on limited land is a primary barrier to project viability. Smartstack 10 MWh helps customers maximise site ROI, improving land use and reducing balance-of-plant costs up to 40 percent versus standard DC blocks.
To support long-term economic performance, Smartstack and Fluence OS are engineered as a unified hardware-software platform, enabling advanced controls, system-level optimisation, and portfolio visibility.
An independent review has found 99.3 percent availability for Fluence across reviewed fleets of 50 MW and above, providing the contractual confidence mission-critical deployments require.
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