Fluence Smartstack is supplied as an AC block with 7.308 MWh nominal energy for 2, 4, 6 and 8 hour configurations. It uses liquid cooling and 3 Ah prismatic cells. The system weighs 10 tonnes (22,046 lb).
Use Cases
Fluence Smartstack has nominal energy in the utility-scale size class. Its supported protocols include DNP3, used in utility control systems, and the specifications indicate use in front of the meter.
Capabilities
Its longest listed configuration is 8 h, which points to capacity value, being counted on as supply when the network is tight. For Fluence Smartstack, the specifications suggest renewable colocation, operating alongside a wind or solar plant on one site: its AC block includes the inverter. Its shortest listed configuration is 2 h, which makes Fluence Smartstack a candidate for peak shaving, cutting the power drawn from the grid at peak times, and the specifications indicate grid services, support that helps operators run the electricity network. The specifications suggest energy shifting, taking in power and returning it hours later: it lists configurations up to 8 h.
Nominal energy
7.31MWh
Duration
2–8flexible
C / P rate
0.5P
What does this system typically cost?
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Energy & Power
Architecture
DC Side
AC Side
Physical & Footprint
Battery Cells
Lifespan
Protection
Full Specification Sheet
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Plant Round-Trip Efficiency
The calculator estimates the full "plant" round-trip efficiency (RTE) at the point of interconnection. Some values are pre-blocked depending on information on a particular ESS. The rows that are marked "each way" are one-way efficiencies; they are applied on charge and again on discharge. We then square them. To enter a bundled PCS efficiency value, use its rated-power value, not peak. If the PCS skid already includes the LV/MV transformer, set Transformer LV/MV to 100 % so those losses are not counted twice.
Site Space Required
Shared: one 3 m aisle serves both neighbours. Dedicated: each unit keeps its own 3 m, so gaps double to 6 m.
Single unit — matches the stored area_sqm convention.
More Fluence Systems
5| Compare | Logo | Vendor | System | Energy | Power | Duration | Battery Cell | Open |
|---|---|---|---|---|---|---|---|---|
| Fluence | GridstackDC Block · cabinet | — | 2MWAC | 1–6hflex | LFP | |||
| Fluence | SmartstackAC Block · cabinet | 7.31MWh | — | 2–8h0.5C · flex | —3 Ah · Prismatic | |||
| Fluence | 5.64MWh | — | 2–8h0.25C · flex | —5 Ah · Prismatic | ||||
| Fluence | 4.87MWh | — | 2–8h0.5C · flex | —3 Ah · Prismatic | ||||
| Fluence | 2000 SERIESDC Block | 2.44MWh | — | 2–8h0.5C · flex | —3 Ah · Prismatic |
About the Vendor
Fluence formed in 2017 as a joint venture between Siemens and AES and began operations in 2018. Based in Arlington, Virginia, it builds a business around grid-scale battery storage, services, and software, has more than 20 GWh of deployed and contracted storage systems worldwide, reported 52 GWh of energy storage across 48 markets, and in 2021 Fluence Energy, Inc. became the holding company and began trading on Nasdaq under FLNC.
How to Read the Product Page
This profile of Smartstack by Fluence is assembled exclusively from public data to support early-stage screening and requires additional due diligence.
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