Fluence Energy, a global leader in energy storage, services, and asset optimization software, has introduced Smartstack™, a high-capacity, AC-based energy storage platform now available for grid-scale use worldwide. Customer deliveries are set to begin in late 2025.
Smartstack is designed to tackle key challenges in the rapidly growing energy storage sector, including performance, shipping logistics, and space limitations. With advanced performance, predictive maintenance, top-tier safety, and a modular, forward-thinking design, it offers an efficient solution to meet increasing demand.
The platform’s patent-pending design breaks battery storage systems into transportable units with manageable dimensions and weight. This design simplifies shipping and installation while maximizing space efficiency at project sites. When equipped with 300 Ah generation batteries, Smartstack achieves an energy density of up to 7.5 MWh—approximately 30% higher than other AC-based systems currently on the market. This allows for greater energy output within existing site footprints, reducing costs and enabling projects at previously unsuitable locations.
Smartstack’s modular architecture adapts to various market needs, offering storage durations of 2, 4, 6, or 8 hours. The platform is built to scale quickly and affordably, ensuring availability during peak demand periods. Its unique design features two main components:
- Smart Skid: This base unit serves as the system’s control hub, housing cooling systems, power control hardware, cabling, and monitoring tools with easy access for maintenance.
- Pods: These battery pods sit on the Smart Skid and house the system’s battery cells. Compatible with multiple battery vendors, the pods ensure competitive pricing and top performance. They are also designed for easy replacement during maintenance or upgrades, ensuring maximum availability.
“Fluence’s history of innovation and fast execution drives our commitment to advancing the energy storage industry,” said Julian Nebreda, Fluence’s President & CEO. “Smartstack is a reimagined solution addressing shipping challenges, product density, serviceability, and modularity.
It provides a more scalable and user-friendly platform, delivering better project economics for our customers.”
Smartstack is backed by Fluence’s top-tier long-term service agreement, guaranteeing up to 99% availability to help customers maximize revenue. Its AI-powered controls optimize performance autonomously while offering full visibility across storage systems, making intelligent operations the focus rather than hardware.
The platform’s modular design supports localized supply chains, allowing components to be sourced or made regionally. This approach enhances cost-efficiency, availability, and compliance while reducing risks related to geopolitical or logistical disruptions.
“Smartstack continues Fluence’s strong commitment to safety and cybersecurity with multi-layer protection,” said Mark Berger, Fluence’s VP of Product and Program Management.
“It incorporates the same trusted safety features as our Gridstack systems, now with higher density and enhanced fire safety certifications. These measures work together to prevent, detect, and contain thermal events, reducing damage and downtime.”
Fluence Energy has delivered or contracted over 37.7 GWh of storage projects globally, including the first grid-connected energy storage system.
About Fluence
Fluence Energy, Inc. (Nasdaq: FLNC) is a global market leader delivering intelligent energy storage and optimization software for renewables and storage. The Company’s solutions and operational services are helping to create a more resilient grid and unlock the full potential of renewable portfolios.
With gigawatts of projects successfully contracted, deployed, and under management across nearly 50 markets, the Company is transforming the way we power our world for a more sustainable future.
For more information, visit our website, or follow us on Linkedln or X. To stay up to date on the latest industry insights, sign up for Fluence’s Full Potential Blog.
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