• ISO 9001 · ISO 14001 · ISO 45001 · CE · UDEM · EAC · CQC
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Millenium Electric assembly hall in Shanghai with switchgear cabinets and an oil-immersed transformer

Shanghai Millenium Industry Co., Ltd.

Transformers, Switchgear, Substations & Energy Storage — Built to Your Grid

Shanghai manufacturer of transformers, switchgear, compact substations and battery energy storage systems, engineered to IEC, ANSI/IEEE, GB and GOST standards and shipped to projects in 40+ countries.

Browse 140 Products Request a Quotation
  • IEC 60076 / IEC 62271 · ANSI/IEEE · GB · GOST
  • ISO 9001 · 14001 · 45001
  • CE · UDEM · EAC · CQC
  • Routine testing on every unit · FAT welcome

Product lines

Nine product lines, from 5 kVA distribution units to 10 MWh storage plants

Every unit is engineered and assembled under our own roof, so capacity, voltage ratio, vector group, conductor metal, insulation class, ingress protection and cooling are all open to change.

Compact & Box-Type Substations

23 products · 10–35 kV · up to 5,000 kVA

Oil-Immersed Distribution Transformers

19 products · 100–4,000 kVA · 10–35 kV

Cast-Resin Dry-Type Transformers

16 products · 100–2,500 kVA · 6.3–22 kV

Power Transformers (up to 110 kV)

16 products · up to 31,500 kVA · 33–110 kV

Pad-Mounted Transformers

5 products · 37.5–1,500 kVA · 13.8 kV · 60 Hz

Pole-Mounted Transformers

16 products · 15–333 kVA · 7.2–35 kV

HV & LV Switchgear

15 products · 400 V – 33 kV · RMU · KYN28 · GGD/GCS/MNS

Containerised Battery Energy Storage Systems

16 products · 500 kWh – 10 MWh · LFP · 20/40 ft

Liquid-Cooled ESS Cabinets

14 products · 93–372 kWh · IP55 · 6,000 cycles

Why buyers work with Millenium

A manufacturer, not a trading company

We wind, cast, tank, wire and test in a 25,000 m² plant in the Lin-gang Special Area of the Shanghai Free Trade Zone — and we welcome you or your inspector on the test floor.

  • 25,000 m²Manufacturing base in Shanghai
  • 200+Staff, including 30+ design & test engineers
  • 40+Countries served
  • 140Products across 9 lines
  • 5 kVA – 31.5 MVATransformer range, up to 110 kV
  • 40 kWh – 10 MWhEnergy storage range

About us

Engineered power for grids worldwide

Millenium — Shanghai Millenium Industry Co., Ltd. — builds transformers, switchgear, compact substations and battery storage systems for utility, industrial, commercial and renewable projects across more than 40 countries. The line reaches from 5 kVA distribution units to 31,500 kVA power transformers, and from 40 kWh storage cabinets to 10 MWh liquid-cooled containers, each engineered to IEC, ANSI/IEEE, GB or GOST and backed by ISO 9001, ISO 14001 and ISO 45001 certified production plus CE, UDEM and EAC approvals.

Every unit is made to order — to your grid, your site and your specification.

About MilleniumView certifications
Copper winding shop with CNC coil winding machines at the Millenium factory
Oxygen-free copper coils are wound on CNC machines in our own winding shop.

Factory & quality

The whole build happens inside our Shanghai plant

CNC copper winding, vacuum resin casting, vapour-phase drying, in-house sheet-metal work and powder coating, and separate assembly lines for transformers, switchgear, compact substations and storage systems.

  • Routine tests on every unit

    Winding resistance, turns ratio, insulation resistance, no-load and load loss, applied and induced withstand voltage and partial discharge — before anything is crated.

  • Type tests on request

    Temperature-rise and dielectric type tests where a project calls for them; storage systems add cell grading, BMS checks, leak tests and a full charge/discharge run.

  • Witness testing welcome

    Customers and third-party inspectors are welcome at factory acceptance tests (FAT). Documentation packs and type-test reports are prepared on request.

  • Built for export

    Shrink-wrapped, palletised or packed in fumigation-free wooden crates, with IEC, ANSI/IEEE, GB or GOST-compliant variants for every regulatory region.

Tour the factory

Featured products

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Projects

Reference configurations by market

From a commissioned 33 kV/11 kV substation in Nairobi to representative configurations for solar, wind, mining, microgrid and storage projects on five continents.

Contact sheet illustrating four stages of a battery storage installation: container delivery, crane placement, battery racks and cooling, finished site
🇩🇪 Germany · Reference design

Germany: 2 MWh Liquid-Cooled Containerized BESS

2 MWh liquid-cooled containerized battery energy storage system with PCS and transformer — Industrial renewable-energy integration, peak shaving and…

Read the project sheet →
Oil-immersed power transformer positioned on a concrete plinth at the substation
🇰🇪 Kenya · Delivered 2023

Kenya: 33 kV/11 kV Distribution Substation

33 kV/11 kV distribution substation — transformer, RMU, LV switchgear, power distribution cabinets and related accessories — Urban and peri-urban…

Read the project sheet →
All projects

Frequently asked questions

Buying from Millenium

Is Millenium a manufacturer or a trading company?

A manufacturer. Shanghai Millenium Industry Co., Ltd. winds, casts, tanks, wires and tests its transformers, switchgear, compact substations and energy storage systems in its own 25,000 m² plant in the Lin-gang Special Area of the Shanghai Free Trade Zone, with more than 200 staff and over 30 design and test engineers.

Which standards and certifications do Millenium products carry?

Designs follow IEC 60076 and IEC 62271 as standard, with ANSI/IEEE, GB and GOST variants. Production is certified to ISO 9001, ISO 14001 and ISO 45001; products carry CE type approval (ECM), UDEM technical inspection attestation to EN 62271-1 and EN 60076-1, an EAC declaration of conformity and CQC approval.

What is the minimum order quantity?

One unit. Every product is built to order — a single 100 kVA transformer or a 10 MWh storage plant — and quoted individually.

What do you need to prepare a quotation?

Rated power, HV and LV voltages, frequency, standard (IEC, ANSI/IEEE or GOST), vector group or phase, quantity, site conditions and the destination port. A single-line diagram or an existing spec sheet is ideal; if details are missing, an engineer will ask.

How long does delivery take?

Typical lead times are 25–45 days for distribution transformers and switchgear, 45–75 days for power transformers and compact substations, and 45–90 days for energy storage systems, plus sea freight. Exact dates are confirmed with the quotation.

Can I witness the factory tests?

Yes. Customers and third-party inspectors (for example SGS, TÜV or Bureau Veritas) are welcome at factory acceptance tests; routine test reports and type-test reports are provided with the shipping documents.

Guides

Latest from the engineering team

Describe the grid and the site — we build to suit.

Send a single-line diagram or a rough spec. An engineer replies with a technical proposal and quotation, usually within one working day.

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