Products / Energy Storage Systems

Energy storage from home to grid

Energy storage across the full range — residential powerboxes, C&I cabinets, and containerized ESS up to 6 MWh. LFP-first for safety and cycle life, UL 9540 certified.

ESS Product Line

From 5 kWh to 6 MWh, engineered as one system

Four form factors. Chemistry, BMS, thermal, and enclosure specified together.

Residential Powerboxes

5–20 kWh wall-mount units for single-family homes. AC-coupled ready for retrofit on existing solar. LFP chemistry for safety in living spaces. Stackable to 60 kWh for whole-home backup.
Spec a Powerbox →

Commercial & Industrial Cabinets

50–500 kWh cabinet systems for C&I sites — demand charge management, peak shaving, and backup. Indoor or outdoor (IP54), integrated thermal management, and BMS-level monitoring.
Spec a Cabinet →

Containerized Systems

500 kWh to 6 MWh in a single container. DC-coupled or AC-coupled architectures. Factory-integrated liquid cooling, fire detection, and BMS. Ships ready to set, cable, and commission.
See the 3.79 MWh platform →

Turnkey Configurations

Inverters, EMS, and fire suppression integrated at the factory. Cell through grid interconnect, handled in-house. One test report, one warranty.
Spec a Turnkey →

All systems engineered in the U.S. Chemistry, BMS, thermal strategy, and certification path specified before the first cell is assembled.

Containerized Platform

3.79 MWh in a 20-foot container

Our utility-scale building block: a liquid-cooled, high-cube 20-ft container with integrated BMS, liquid cooling, and fire detection and suppression. Rated for full 1C charge and discharge.

Catalog part number: PBC-MW-3794
3,794 kWh
Rated energy
3,794 kW
Rated charge / discharge (1C)
1,331 VDC
Rated voltage (1,040–1,500 V)
-25 to +55°C
Operating ambient
~36 t
Shipping weight (≈79,400 lb)
Chemistry
LFP · 285 Ah cells
Nominal Voltage
1,331.2 V (1,040 – 1,500 V)
Capacity
2,850 Ah
Energy
3.79 MWh
Continuous Charge / Discharge
2,850 A (1C)
Peak Discharge
3,400 A (60 s)
Dimensions
6,058 × 2,462 × 2,896 mm
Weight
~36,000 kg
Operating Temp
-25°C to +55°C
Ingress
IP55 / NEMA 3R
Parallel
Up to 4 containers
Certifications
UN38.3 · UL 1973 · UL 9540A (tested) · IEC 62619 · IEC 62477 · IEC 62933-5-2 · IEC 63056 · IEC 61000-2-4 / -2-6

Full specification, site requirements, and certification scope provided with every quote.

Spec a Container
Certification & Safety

UL 9540 is the baseline, not the ceiling

Every ESS is engineered to the North American system standard, fire-tested to UL 9540A, and sited to NFPA 855.

UL 9540 System Certification
The ESS system standard for North America. Full certification path runs in-house — test planning, lab coordination, documentation — so the project is AHJ-ready at ship.
UL 9540A Fire Propagation Testing
Cell, module and installation-level thermal runaway testing. Under the 6th Edition (13 March 2026) the unit-level test applies to residential systems and to non-residential systems with active thermal runaway propagation prevention. Test plan and report delivered before construction starts.
NFPA 855 Compliant
Spacing, siting, and fire protection requirements met out of the box. Enclosure placement, egress, detection, and suppression designed against the current code so permitting doesn't stall.
Specs at a Glance

Numbers, not adjectives

Baseline specifications across the ESS line. Chemistry and capacity tuned to your duty cycle on every program.

Chemistry
LFP (primary) · NMC available
Round-trip Efficiency
95%+
Cycle Life
6,000+ at 80% DOD
Operating Temp
-20°C to 50°C
Warranty (Standard)
10 years
Warranty (Extended)
15 years
Capacity Range
5 kWh – 6 MWh
Certifications
UL 9540 certified · UL 9540A tested · NFPA 855 sited
Start a Program

Tell us the site, the load, and the cycle

Send the application — grid-tied, behind-the-meter, islanded, or hybrid. Back comes a chemistry, capacity, enclosure, and certification-path spec.

Start an ESS Project
⚡ Start a Project