Products · Line S

S Series

Series-before-Parallel battery storage from 261 kWh to 4.07 MWh per enclosure — self-contained outdoor units, AC-coupled behind the meter and run by StorOS™.

S300S800S1000S4000
S300 · 261 kWh

Up to 4.07 MWh

Energy per enclosure

Up to 2 MW

Rated power per unit

LFP

Cell chemistry, every model

Liquid

Cooling across the line

Technical Specifications

Four Models, One Architecture

Every S Series enclosure shares the same Series-before-Parallel design — pick the size that matches your load.

S4000

S4000

UL 9540UL 9540AUL 1973NFPA 69UN 38.3EN IEC 62619

4.07 MWh dischargeable per unit — the workhorse of the distributed fleet, deployed behind the meter at customer sites.

Dischargeable Energy4.07 MWh
Rated DC Power2 MW
Output Voltage Range1,164-1,498 VDC
Auxiliary Power30 kW max
Auxiliary Input Voltage480V 3P
Dimensions (WxDxH)19.9'x8.0'x9.5' ft
Weight83,775 lbs
Environmental protectionIP55
CoolingLiquid
Cell ChemistryLFP
Operating Temperature Range-30 to 50 C
Warranty5 yrs Std - 20 yrs Ext.
Download Datasheet

Product Line S

Designed for Savings, Sized for the Site

Product Line S is built on Series-before-Parallel architecture, scaled from a 261 kWh cabinet to a 4.07 MWh enclosure. Every unit is self-contained and outdoor-rated — deployed on a pad or rooftop, with no indoor battery room.

The foundation does not change with size: LFP cell chemistry, liquid cooling, and thermal runaway contained at the individual cell level. Every enclosure ships on StorOS™, dispatched automatically around your tariff.

S Series product line

Recommended Deployments

Where the S Series Fits

The solution segments that run on S Series hardware.

Utilities

S4000

A distributed, dispatchable behind-the-meter fleet of S4000 units across your territory — peak relief on constrained feeders at the hours that matter, with no utility construction required.

  • Peak relief on constrained feeders at system-peak hours
  • 10-year performance guarantee: on every unit in the fleet
  • Customer-side only: no market license or capacity obligation
  • Territory-wide telemetry via StorOS™ Global Overview and Fleet Overview
Learn More
Utilities

Commercial & Industrial

S800S1000

Storage as a service for fabs, cold storage, logistics and multifamily — most of the demand charge disappears, verified month by month in StorOS.

  • Demand charge reduction: typically 30–50% of a C&I bill
  • Sized to the property: S800 for mid-market, S1000 for large C&I
  • No indoor battery room: self-contained outdoor enclosures
  • StorOS™ EaaS + StorSafe™ keep savings and safety in one view
Learn More
Commercial & Industrial

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Bring one site or a mixed fleet of someone else's hardware — we'll stand up a live demo against your telemetry.

Solutions customized to your site's needs
Works with your existing hardware — TeraStor or third-party
See StorOS live on a real fleet

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