Containerised BESS

A containerised BESS is a power plant in a box — CMX Battery integrates MWh of LiFePO4 with liquid cooling, PCS, fire suppression and EMS into one transportable, grid-code-ready unit.

Overview

Containerised BESS packages LiFePO4 modules, liquid cooling, power conversion, fire suppression and an energy management system into a standard shipping-container footprint, delivered as a single commissionable unit. CMX Battery engineers for round-trip efficiency across thousands of series/parallel strings, cell balancing at scale, and grid-code compliance for the target utility — front-of-meter, behind-the-meter, microgrid or solar-smoothing. The container is the right form once a project passes roughly 500 kWh to 1 MWh, wheredecentralized cabinets become a wiring and O&M burden.

Key specifications

Specification	Value	Why it matters
Scale	MWh-class (0.5–5+ MWh typical)	Transportable unit.
Integration	Cells, liquid cooling, PCS, fire suppression, EMS	One commissionable system.
Chemistry	LiFePO4	Safe, long-cycle at scale.
Grid	Grid-code compliance per market	Front/behind-the-meter, microgrid.
Cooling	Liquid	Uniform temperature at scale.

Typical applications

Utility and C&I peak shaving: Large demand reduction.
Solar/wind smoothing: Firming variable generation.
Microgrids: Islanded or grid-support.
Grid services: Frequency and capacity.

How to specify & buying guide

Define the grid role (front/behind-the-meter, microgrid) — it sets PCS and compliance requirements.
Model round-trip efficiency and degradation across the project life, not just nameplate.
Confirm fire suppression, UL9540A and local grid-code early; they drive enclosure and controls.
Plan O&M access, monitoring and coolant service for the full term.

Engineering & manufacturing at CMX Battery

Containerised BESS integrates LiFePO4 modules, liquid cooling, PCS, fire suppression and EMS in a single transportable unit. We engineer for MWh-scale round-trip efficiency, cell balancing across thousands of series/parallel strings, and grid-code compliance for the target utility.

Certifications & compliance

UN38.3 — Mandatory lithium battery transport test (altitude, thermal, vibration, shock, external short). Required for any cross-border shipment.
IEC62619 — International safety standard for industrial Li-ion cells and batteries; expected by EU and most APAC buyers.
UL1973 — North American safety standard for stationary lithium battery systems.
UL9540A — Fire safety test method for ESS installations; often required by US authorities having jurisdiction.
IEC63056 — Safety requirements for stationary lithium battery energy storage systems.
CE — EU declaration of conformity for the applicable directives.
IP54

Frequently asked questions

What size are your containers?

Typically 0.5–5+ MWh per unit; multiple units parallel for larger sites.

Is it grid-code compliant?

We engineer to the target utility's grid code; confirm the market up front.

What is inside?

LiFePO4 modules, liquid cooling, PCS, fire suppression and EMS.

How is it shipped and installed?

As a transportable container; site work is foundation, grid tie and commissioning.

Request a quote

Send us your voltage, capacity, dimensions, certification target and annual volume. Our engineering team returns a proposal within three working days. Start your RFQ or review our custom pack capabilities.