Rows of 5 MWh BESS enclosures for the Zhongwei project at the ETENZ factory

Ningxia Zhongwei Project: 143 5 MWh BESS Enclosures

Grid-Forming Energy Storage Project, Zhongwei|China & East Asia

Batch

143 units

Unit capacity

5 MWh

Enclosure

20-ft class

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Project Overview

Renewables & StorageMay 2026China & East Asia

A 720 MW/1,440 MWh grid-forming LFP energy storage project is advancing in Shapotou District, Zhongwei, Ningxia. For the NR Electric equipment package, ETENZ is producing 143 twenty-foot-class 5 MWh BESS enclosures, providing a common platform for equipment installation, system commissioning and site deployment. To support series production at this scale, structural dimensions, internal supports, equipment mounting positions, interface openings and service clearances are controlled to one manufacturing baseline. Multidisciplinary interfaces are completed in the factory so each batch can move smoothly into downstream assembly.

Twenty-foot-class 5 MWh BESS enclosure with an end service door

Service Scope

BESS enclosure manufacturing and interface prefabrication

ETENZ manufactures the twenty-foot-class enclosure structures, arranges the internal battery-rack supports, and fits out the end fire-service and auxiliary distribution zones. Equipment mounting points, cable routes, earthing connections, service clearances and related openings are prefabricated to NR Electric interface requirements. All 143 units follow common drawings, processes and inspection criteria.

Fire-control and suppression equipment in the end service zone of a BESS enclosure

Engineering & Integration

One manufacturing baseline for 143 units

Critical dimensions, support locations, doors, service openings, equipment mounting points and interface openings are standardized and checked by batch, giving downstream assembly a stable starting point.

Coordinated equipment layout and service access

Tiered supports run along both sides of the enclosure while a continuous central aisle preserves working space for equipment installation, cable organization and maintenance.

Consolidated fire and auxiliary service zone

Fire controls, suppression equipment and auxiliary electrical components are grouped at the enclosure end with dedicated external access for factory assembly and routine service.

Interfaces completed in the factory

Openings, earthing points, terminal locations and cable routes are prepared alongside enclosure fabrication, reducing site modifications and improving coordination between production batches.

Tiered supports on both sides of a BESS enclosure with a central service aisle

Delivery Outcome

The 143-unit batch follows one structural platform, internal layout and interface baseline, providing a stable and repeatable prefabricated foundation for staged installation of NR Electric energy storage equipment and site deployment.

143 units

Production batch

Manufactured in stages on one enclosure platform and interface baseline.

5 MWh

Unit capacity

Configured for the project's twenty-foot-class energy storage layout.

20 -ft class

Enclosure format

Supports standardized production, transport and grouped site deployment.

Project Value

For utility-scale energy storage projects, consistency across a large production batch directly affects downstream equipment installation and site coordination. By completing the structure, supports, fire-service zone and auxiliary electrical interfaces in the factory, this project reduces interface variation and site rework while establishing a reusable quality-control model for similar 5 MWh BESS enclosure programs.