The enclosure is engineered for 28 battery-pack positions and a nominal 6.25 MWh configuration. Cells and packs are supplied and installed by the customer or battery supplier. ETENZ delivers the pack-ready enclosure, with battery racks, LV auxiliaries, in-cabin DC, thermal management and fire protection completed to the selected delivery tier.
CSC
ISO 14001
ISO 45001
ISO 9001
Battery Energy Storage Enclosure (20 ft, 6.25 MWh)
For BESS integrators and battery manufacturers: full-side pack loading, standard container transport, and delivery from bare enclosure to OEM/ODM fit-out.
Battery Energy Storage StationRenewable Energy Collector Station SupportRenewable Grid-Connection Power Distribution
Key Metrics
6.25MWh
Capacity
20 ft high cube
Format
IP54 / 55
Protection
25years
Design life
Product Features
Side-loaded packs
Battery packs slide straight into cantilever racks through the long-side doors, so installation and replacement are completed from outside without an internal aisle.
Side-loaded packs
Battery packs slide straight into cantilever racks through the long-side doors, so installation and replacement are completed from outside without an internal aisle.
50 t CSC container
The type-approved container has a 50 t maximum gross mass and can be booked, lifted and secured as a standard freight container rather than out-of-gauge cargo.
Pack-specific racks
A rack envelope drawing is issued at quotation stage so the pack supplier can confirm dimensions, fixing points and interfaces before the rack design is released.
Liquid cooling
The liquid-cooling scope can extend from the chiller to quick couplings at every rack, including branch flow balancing and dehumidification selected against coolant dew point.
Piped suppression
Detection, alarm and release interfaces are completed with the enclosure; the piped suppression package can be supplied by ETENZ or integrated around the customer's nominated system.
Factory-built DC
DC combining, internal busbars and DC output terminals can be completed at the factory, leaving a defined interface from the output terminals to the PCS.
Product Details
Open side-door rack bay with tiered cantilever rails, overhead lighting and detection, and red suppression pipework at floor level
Each long-side door opens onto one independent rack bay and exposes its full cross-section. Cantilever rails are fixed in tiers to both side walls so packs can be pushed into position from outside. Lighting and detection devices run overhead, cable routes follow the roof, and the suppression pipework stays low along the floor. ETENZ engineers the tier spacing, shelf loading and pack fixing points to the pack outline, mass and anchoring loads.
Open side-door rack bay with tiered cantilever rails, overhead lighting and detection, and red suppression pipework at floor level
The suppression main follows the roof steelwork, held by bolted clamps on galvanized channels before dropping vertically to the individual rack bays. Pipework, detection and alarm devices are installed in the factory, with release and interlock signals connected to the enclosure control circuit and checked during cabin-level inspection. Explosion venting and emergency extract interlocked with hydrogen and carbon-monoxide detection are configured to the project and local code.
A dedicated electrical door at the end wall groups the viewing windows, run and fault indicators and emergency-stop pushbutton. Operators can check status without opening the door and stop the unit locally from outside. The LV auxiliary distribution and control area sits behind the door; its panels follow IEC 61439-1/-2, with lighting, sockets and internal wiring completed at the factory. The CSC safety approval plate is mounted on the lower door panel.
Each door is bonded to its frame with a braided copper strap, while the green-yellow PE conductor terminates on a welded earthing stud with a clear earth label. A separate external earthing point on the base frame connects the enclosure to the site earth grid. A continuous rubber gasket runs around the frame, and the locking bars compress it to meet the selected IP54 or IP55 protection target.
Equipment and service openings in the corrugated end wall are cut at the factory to the approved layout. Bolted cover plates and sealant close them during transport and storage, then the project ventilation, pressure-relief or service components are connected during installation. Customers taking a bare enclosure can continue their fit-out from these prepared interfaces without cutting the shell on site.
Raised frames at the four roof corners position the lifting holes above the roof plane, keeping slings clear of the top panels. Lifting-point labels and black-yellow warning markings make the handling points easy to identify, while ISO corner castings at the base provide the transport restraint points. Lifting points, rigging and centre of gravity are checked against the loaded configuration, with the final lifting mass confirmed for the project.
Delivery Scope Options
Scope 1
Bare-Shell Supply (Interfaces Reserved)
Scope 1Bare-Shell Supply (Interfaces Reserved)
The 20 ft high-cube enclosure is manufactured to the approved layout with side doors, prepared openings, earthing points and raised lifting frames, ready for integrators completing the internal systems themselves.
Scope Includes:
20 ft high-cube enclosure with full-side doors
Insulation, coating and door sealing
Prepared equipment and service openings
Earthing points and raised lifting frames
Technical Specifications
Container format
20 ft high cube (ISO container type)
Overall dimensions (L×W×H)
6058 × 2438 × 2896
mm · ISO 668
Container approval
CSC type approved, maximum gross mass 50,000
kg · CSC
Battery arrangement
28 battery-pack positions, nominal 6.25 depending on selected cells and pack configuration
MWh
Battery racks
Non-walk-in cantilever racks loaded through long-side doors; engineered to pack type, mass and anchoring loads
Structure and materials
2.0 galvanized roof sheet, 1.6–2.0 corrugated wall sheet, 50 rock-wool insulation, channel and square-tube frame
mm
Ingress protection
IP54 / IP55, confirmed against opening and sealing configuration
IEC 60529
Corrosion category
C3–C5, coating system selected for the project environment
ISO 12944
Design life
25 (structural design life)
years
Thermal management
Liquid cooling: chiller, distribution pipework, quick couplings to each rack and branch flow balancing; dehumidification selected against coolant dew point
Fire protection
Detection, alarm and release interlocks; piped suppression supplied by ETENZ or customer-nominated; explosion venting and emergency extract configured by project
LV auxiliary and control
Auxiliary distribution and control panels, lighting and emergency lighting, sockets, internal wiring and cable management
IEC 61439-1 / -2
In-cabin DC
DC combining, internal busbars and DC output terminals; electrical scope ends at the DC output terminals
Monitoring and security
Access control, cameras, water-leak and temperature-humidity monitoring; BMS alarm and EMS / SCADA communication interfaces
Factory inspection
Cabin-level FAT covering structure, cooling under load, fire protection, LV, ingress protection and circuit checks, with records supplied
Standards adaptation
IEC / GB design basis; EN configuration for Europe; UL / NFPA interface documents and nameplates adapted for North America
Warranty
Enclosure 12, extendable to 24 by project
months
| Parameter | Specification |
|---|---|
| Container format | 20 ft high cube (ISO container type) |
| Overall dimensions (L×W×H) | 6058 × 2438 × 2896 mm · ISO 668 |
| Container approval | CSC type approved, maximum gross mass 50,000 kg · CSC |
| Battery arrangement | 28 battery-pack positions, nominal 6.25 depending on selected cells and pack configuration MWh |
| Battery racks | Non-walk-in cantilever racks loaded through long-side doors; engineered to pack type, mass and anchoring loads |
| Structure and materials | 2.0 galvanized roof sheet, 1.6–2.0 corrugated wall sheet, 50 rock-wool insulation, channel and square-tube frame mm |
| Ingress protection | IP54 / IP55, confirmed against opening and sealing configuration IEC 60529 |
| Corrosion category | C3–C5, coating system selected for the project environment ISO 12944 |
| Design life | 25 (structural design life) years |
| Thermal management | Liquid cooling: chiller, distribution pipework, quick couplings to each rack and branch flow balancing; dehumidification selected against coolant dew point |
| Fire protection | Detection, alarm and release interlocks; piped suppression supplied by ETENZ or customer-nominated; explosion venting and emergency extract configured by project |
| LV auxiliary and control | Auxiliary distribution and control panels, lighting and emergency lighting, sockets, internal wiring and cable management IEC 61439-1 / -2 |
| In-cabin DC | DC combining, internal busbars and DC output terminals; electrical scope ends at the DC output terminals |
| Monitoring and security | Access control, cameras, water-leak and temperature-humidity monitoring; BMS alarm and EMS / SCADA communication interfaces |
| Factory inspection | Cabin-level FAT covering structure, cooling under load, fire protection, LV, ingress protection and circuit checks, with records supplied |
| Standards adaptation | IEC / GB design basis; EN configuration for Europe; UL / NFPA interface documents and nameplates adapted for North America |
| Warranty | Enclosure 12, extendable to 24 by project months |
Product FAQs
Yes. The enclosure uses a 20 ft high-cube ISO outline of 6058 × 2438 × 2896 mm. Its type-approved CSC design has a maximum gross mass of 50,000 kg and carries a CSC safety approval plate, allowing standard-container booking, lifting and securing. If a project changes the outline or openings, the approval body confirms whether the existing approval remains applicable; dangerous-goods declarations and carrier acceptance for a battery-loaded unit are handled by the shipper.
Yes. The racks are engineered to the pack outline, mass, fixing points and cooling interfaces. At quotation stage ETENZ issues an envelope drawing showing usable width, height and depth, shelf load, cooling connection locations and pack fixing points for confirmation by the battery supplier before release.
The standard project approach is liquid cooling. ETENZ can supply the chiller, distribution pipework and quick couplings to every rack and balance flow across the branches; the cold plates inside the packs belong to the battery supplier. The chiller position is fixed on the general arrangement, dehumidification is selected against enclosure humidity load and coolant dew point, and cooling capacity follows the heat load provided by the battery supplier.
Either route is available: ETENZ can supply and install the piped suppression system, or integrate a customer-nominated system and extinguishing agent. Detection, alarm, release and interlock interfaces are included in both arrangements; explosion venting and emergency extract are configured to the project and local code.
The available scope includes DC combining, internal busbars, DC output terminals and sealed cable-entry plates inside the enclosure, and ends at the DC output terminals. PCS, transformer, MV switchgear and grid connection remain with the customer or system party; ETENZ supplies interface information for terminal positions, acceptable cable sizes and bending space.
Cabin-level factory inspection covers structure, cooling under load, fire protection, LV systems, ingress protection and circuit checks, with records included in the handover file and customer witnessing available. The document package includes the general arrangement, single-line diagram, interface list, inspection records, bill of materials, nameplate data, supplier certificates and O&M manual. System-level testing after the packs are installed remains with the system party.
Please provide the battery-pack drawing with outline, mass, fixing points and cooling interfaces; battery-string and DC data; heat load; fire-protection requirements; site temperature, humidity, altitude, wind and corrosion conditions; destination-market standards and certification requirements; and the required delivery tier.
Related Solutions
Energy Storage & Renewables
Battery Energy Storage System Prefabrication Solution
For storage and renewable projects, ETENZ delivers prefabricated enclosures with power, thermal, fire, security and monitoring interfaces, factory pre-tested to cut build time and support phased expansion and OEM/ODM.
Product Application Cases
Related Products
New Energy Enclosures
Battery Energy Storage Enclosure (48 packs, 5 MWh)
New Energy Enclosures
Medium-Voltage Direct-Connect BESS Enclosure (5.6 MWh)
New Energy Enclosures
Battery Energy Storage Container (20 ft, 5 MWh)
New Energy Enclosures
All-in-One Energy Storage Cabin (10 ft)
Electrical E-Houses
Eight-Module GIS Switchgear E-House
Distribution Switchgear
