TheTechno Optimist.

Smartstack Battery Storage PlatformFluence Energy—Fluence launches Smartstack 10 MWh system with ~680 MWh/acre site densityFluence Energy—Fluence reports record 5.6 billion order backlog as demand surges for grid storage

Fluence Energy

Grid-scale battery storage, energy storage software

USpublic~1,712 staffest. 2018fluenceenergy.com (opens fluenceenergy.com)Checked 11 Oct

The brief

Analyst view
  • Fluence Energy is the largest independent grid-storage developer in the Western Hemisphere.
  • The company reported a 6.4 billion backlog in 2026, with Smartstack at 75% of orders.
  • Fluence operates a dual model: hardware (Smartstack) and software (Fluence OS) for grid optimization.

Technical approach

As reported
Smartstack

Modular battery platform

Smartstack uses containerized modules with high site-level density, offering 2, 4, 6, and 8-hour durations.

Software

AI-enabled grid optimization

Fluence OS provides autonomous controls and system-level optimization to maximize revenue from storage assets.

Primer