20 ft 5 MWh battery energy storage container: exterior view

ISO 14001

ISO 45001

ISO 9001

Battery Energy Storage Container (20 ft, 5 MWh)

Q: What certifications apply? How are battery transport certificates handled?

The enclosure is manufactured under the ISO 9001 / 14001 / 45001 systems; UL/IEC and UN 38.3 transport certificates for batteries and the PCS are provided by the equipment supplier and bound to the specific model, while declaration and carrier acceptance for battery transport rest with the shipping party.

For C&I and renewable storage developers, system integrators and equipment OEMs worldwide — 5 MWh of battery racks in one container; enclosure only to OEM/ODM.

Utility-Scale Battery StorageC&I Battery StorageCollector SubstationRenewable Energy Grid Connection

‎5 MWh nominal

Capacity

‎20 ft ISO

Form factor

25 yr

Design life

IP54 / 55

Ingress rating

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Product Features

Containerized enclosure

Standard 20 ft container structure with multiple battery-rack rows; corner-casting lifting makes the whole cabin easy to ship and position, while forklift pockets serve the empty cabin.

Containerized enclosure

Standard 20 ft container structure with multiple battery-rack rows; corner-casting lifting makes the whole cabin easy to ship and position, while forklift pockets serve the empty cabin.

Multi-rack battery layout

Multiple battery-rack rows inside the cabin, with footprint and service aisles reserved per module type. Rated at a nominal 5 MWh, configurable to the battery selection.

Integrated subsystems

Power distribution, HVAC, fire protection, combustible-gas detection and monitoring interfaces are pre-built inside the cabin — wire the equipment on site and commission.

Pipe-network suppression

Smoke, heat and combustible-gas detection tie into the fire alarm control panel, with interfaces provided for pipe-network fire suppression and release.

Active thermal management

HVAC and forced ventilation are sized to the heat load to hold the working-temperature envelope for the batteries; cooling capacity is confirmed against the system heat load.

Product Details

Multiple battery-rack rows inside the cabin

Multiple battery-rack rows reserve footprint, service clearance and replacement aisles per module type, with cable routing and interfaces organized. Battery modules are supplied per project scope or customer-furnished; the nominal 5 MWh is configurable to the battery selection, and cell-level performance is defined by the equipment supplier.

Multiple battery-rack rows inside the cabin

Smoke and heat detection tie into the fire alarm control panel; suppression piping and release/interface points are laid out inside the cabin. The suppression system is configured per project and by the equipment party, while thermal-runaway protection and AHJ / fire-marshal review are led by the project owner.

The fire alarm control panel centralizes smoke, heat and gas detection plus audible-visual alarms, interlocking suppression release and emergency devices. Communication interfaces to upstream monitoring / fire host are prepared, with interlock logic confirmed per project.

Combustible-gas detectors monitor battery off-gassing risk inside the cabin, interlocking audible-visual alarms and gas warning signage. Ventilation and gas handling are configured to the battery supplier's and code requirements, with hazard assessment owned by the system party.

HVAC and forced ventilation organize airflow and heat exchange inside the cabin, holding the working-temperature envelope for the batteries against the heat load. Intake/exhaust, louvers and fans are sized to the heat load and system design, suited to outdoor and high-temperature sites.

Environmental monitoring for temperature/humidity and water ingress plus a control cabinet are integrated inside the cabin, with BMS alarm, EMS/SCADA and remote-monitoring communication interfaces prepared. Data and operation responsibility is defined by the system party; ETENZ supports the interfaces and documentation delivery.

Delivery Scope Options

Scope 4

OEM/ODM Under Your Brand

Scope 4

Containerised storage cabins built and delivered in volume to the customer's brand, colours, interface standards and multi-site baseline: non-standard dimensions, special voltage interfaces, extreme-climate and corrosion adaptation, noise reduction.

Scope Includes:

Cabin type designed with your engineers

Non-standard dimensions and special voltage interfaces

Customer brand, colours and nameplates

Extreme-climate adaptation and heavier corrosion protection across high heat, cold, humidity, altitude and C5

One baseline cabin type and interface library across sites

Inquire

Scope 1

Enclosure Only (Interface-Ready)

Scope 1

The 20 ft containerised storage cabin is supplied enclosure-only, with every interface prepared: distribution and incoming connections, separated battery and electrical zones, and the openings and mounting positions for the climate, fire and monitoring subsystems. Battery racks can be pre-fitted. Battery modules and the PCS are free-issued by the customer or supplied separately — suited to projects that already hold the equipment or prefer to buy it themselves.

Scope Includes:

Complete 20 ft container cabin structure with doors, louvres and lighting

Distribution and incoming interfaces prepared

Battery zone, electrical zone and maintenance aisle separated

Climate, fire and monitoring subsystem interfaces prepared

Battery racks optionally pre-fitted to the module type

Lifting castings, forklift pockets and transport packing

Inquire

Scope 2

Subsystem Integration

Scope 2

Cabin subsystems are fitted onto the shell: air conditioning and forced ventilation, the fire alarm panel and detectors, combustible-gas detection, suppression pipework and emergency-device interfaces, together with internal distribution and cable routing. Interfaces and labelling are checked item by item at the works.

Scope Includes:

Air conditioning and forced ventilation fitted

Fire alarm panel and detectors

Combustible-gas detection and suppression pipework interfaces

Internal distribution, routing and maintenance aisle

Interface and labelling check

Inquire

Scope 3

Factory-Integrated Module

Scope 3

Multi-row battery racks are built to the module type; battery modules and the PCS are supplied within the project scope or free-issued and then installed. BMS alarms and the EMS/SCADA remote monitoring interface are connected, and the cabin ships after works inspection, ready to be connected on arrival. ETENZ is responsible for the cabin and its fit-out; battery and PCS performance is defined by their supplier.

Scope Includes:

Multi-row battery racks and routing built to the module type

Battery modules and PCS installed

BMS alarm and EMS/SCADA interface connected

Works inspection of assembly, distribution, interfaces and labelling

Inquire

Scope 4

OEM/ODM Under Your Brand

Scope 4

Scope Includes:

Cabin type designed with your engineers

Non-standard dimensions and special voltage interfaces

Customer brand, colours and nameplates

Extreme-climate adaptation and heavier corrosion protection across high heat, cold, humidity, altitude and C5

One baseline cabin type and interface library across sites

Inquire

Scope 1

Enclosure Only (Interface-Ready)

Scope 1

Scope Includes:

Complete 20 ft container cabin structure with doors, louvres and lighting

Distribution and incoming interfaces prepared

Battery zone, electrical zone and maintenance aisle separated

Climate, fire and monitoring subsystem interfaces prepared

Battery racks optionally pre-fitted to the module type

Lifting castings, forklift pockets and transport packing

Inquire

Technical Specifications

Nominal storage capacity

Nominal 5 MWh (configurable to battery module and layout)

MWh

Structure type

‎20 ft ISO containerized BESS cabin

Overall dimensions

‎20 ft standard container baseline (approx. 6058×2438); height and layout per project

Roof / wall / frame

Roof 2.0 galvanized / wall 1.6-⁠2.0 corrugated / 50 rock-wool insulation / channel-steel & square-tube frame

Ingress protection

IP54 / IP55

IEC ⁠60529

Corrosion grade

C3 / C4 / C5 (selected per environment)

ISO ⁠12944

Ambient temperature

Working temperature range configured per layout (exact range confirmed per project)

Battery supply scope

Customer-furnished / supplied / reserved (batteries are supplier-provided by default)

Battery module / chemistry

Defined by the battery supplier (ETENZ does not warrant cell performance / safety)

Inverter / PCS scope

Included / housed / reserved / excluded; model and service clearance per project

Temperature control

HVAC / forced ventilation / combination (sized to heat load and system design)

Fire detection

Smoke / heat / gas detection + alarm + interlock interface

NFPA ⁠72

Suppression / interface

Suppression piping / release / interface / FACP interface (suppression system is supplier-provided)

Monitoring / EMS interface

BMS alarm / EMS·SCADA integration / remote monitoring

Transport / lifting

Shipped as a whole; lifting points / corner castings, plus forklift pockets for the empty cabin (exact tonnage confirmed per project)

Warranty

Enclosure 12 (extendable to 24, project-dependent; battery/PCS warranty by the equipment supplier)

months

Parameter	Specification
Nominal storage capacity	Nominal 5 MWh (configurable to battery module and layout) MWh
Structure type	‎20 ft ISO containerized BESS cabin
Overall dimensions	‎20 ft standard container baseline (approx. 6058×2438); height and layout per project mm
Roof / wall / frame	Roof 2.0 galvanized / wall 1.6-⁠2.0 corrugated / 50 rock-wool insulation / channel-steel & square-tube frame mm
Ingress protection	IP54 / IP55 IEC ⁠60529
Corrosion grade	C3 / C4 / C5 (selected per environment) ISO ⁠12944
Ambient temperature	Working temperature range configured per layout (exact range confirmed per project)
Battery supply scope	Customer-furnished / supplied / reserved (batteries are supplier-provided by default)
Battery module / chemistry	Defined by the battery supplier (ETENZ does not warrant cell performance / safety)
Inverter / PCS scope	Included / housed / reserved / excluded; model and service clearance per project
Temperature control	HVAC / forced ventilation / combination (sized to heat load and system design)
Fire detection	Smoke / heat / gas detection + alarm + interlock interface NFPA ⁠72
Suppression / interface	Suppression piping / release / interface / FACP interface (suppression system is supplier-provided)
Monitoring / EMS interface	BMS alarm / EMS·SCADA integration / remote monitoring
Transport / lifting	Shipped as a whole; lifting points / corner castings, plus forklift pockets for the empty cabin (exact tonnage confirmed per project)
Warranty	Enclosure 12 (extendable to 24, project-dependent; battery/PCS warranty by the equipment supplier) months

Product FAQs

Delivery spans enclosure-only supply, rack-ready cabin, factory-integrated module and OEM/ODM. You can buy the enclosure only (structure, power distribution and HVAC / fire / monitoring subsystem interfaces prepared); battery modules and the PCS are customer-furnished or supplied per project scope. ETENZ manufactures the enclosure and handles subsystem integration and does not warrant battery/PCS performance.

‎5 MWh is a nominal capacity, configurable to the battery module type and layout. By default battery modules and the PCS are customer or integrated equipment, and ETENZ provides for the battery racks, cable routing and connection interfaces; they can be supplied and installed per scope if the project requires, but round-trip efficiency, cycle life and equipment certification are defined by the battery/PCS supplier.

The cabin integrates smoke, heat and combustible-gas detection tied into the fire alarm control panel for audible-visual alarms, with suppression piping and release/interface points laid out. The specific suppression medium and system configuration, thermal-runaway protection and local fire (AHJ) review are determined per project and by the equipment party; no UL ⁠9540 / NFPA "pass" claim is made at the cabin level.

A combination of HVAC and forced ventilation is used, sized to the heat load to organize airflow and heat exchange inside the cabin. The actual cooling capacity is set by the system heat load, and the battery working-temperature range follows the battery supplier's limits; the design suits outdoor and high-temperature sites.

Yes. With standard cabin types and an interface library, ETENZ supports OEM/ODM and consistent multi-site delivery, customizable to the customer's brand, color, interface standards and non-standard sizes — well suited to volume, repeatable storage-station deployment.

The 20 ft ISO container is the baseline cabin type, customizable to equipment layout and shipping conditions; AC interfaces, voltage and the transformer/switchgear boundary are set per project; ingress rating IP54/55 and anti-corrosion C3-⁠C5 are configured to indoor/outdoor use and environmental grade.

The enclosure is manufactured under the ISO ⁠9001 / 14001 / 45001 systems; UL/IEC and UN 38.3 transport certificates for batteries and the PCS are provided by the equipment supplier and bound to the specific model, while declaration and carrier acceptance for battery transport rest with the shipping party.

We recommend providing: application scenario (storage station / C&I storage / renewable aggregation, etc.), battery module and PCS model, capacity and interfaces, system heat load, site climate and voltage level, transport and foundation conditions, and brand and delivery-documentation requirements. The more complete the information, the more precise the cabin and interface configuration.

Yes. To date, ETENZ products have been sold in more than 20 countries and regions across Asia, Europe, Africa, North America and South America, and delivered to over 3,000 projects.