Mega Power 4000 Series

High-Density Energy Storage for 
Extra-High-Voltage Projects.

Up to 4.69 MWh in a standard 20-ft container, engineered for high density, efficient transport and two-high stacking.

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The Mega Power 4000 Advantage

High

Capacity


Up to

4.69 MWh


Built for extra-high-voltage BESS projects

Two-High

Stackable


~3.4×

the Capacity

per Footprint*1


Reduces land and site-preparation requirements

Built for Demanding Conditions


Up to

IP56*2


Enhanced Salt-Corrosion Protection

Built for Global Deployment


ISO-standard

20-ft Container


Shippable overseas for global deployment.

*1 Approximate capacity ratio of a two-high Mega Power 4000 configuration versus one Mega Power 2700A within the same footprint.

*2 IP55 is standard; IP56 is available as an option.

*3 Mega Power 2700A/2500との比較


Up to 9,384 kWh on a Single 20-ft Container Footprint

Existing Model

Mega Power 2700

2,742 kWh

Same Footprint.

Higher Capacity Density.

~1.7x the

capacity

One Mega Power 4000 Unit

~4,692 kWh

2-high Stackable.

Even Higher Density.

~3.4x the

capacity

Two Mega Power 4000 Units

~9,384 kWh

Proven Expertise. Built for Utility Scale.

Mega Power 4000 combines PowerX’s design, manufacturing, and operational expertise in a high-capacity BESS delivering up to 4.692 MWh per unit. Its high energy density supports extra-high-voltage battery plants and generation co-location projects worldwide, helping streamline deployment from transport and installation through operation.

Illustration of an Extra-High-Voltage BESS Installation

/megapower/4000series install

Illustration of a Renewable Energy Power Plant Co-location

/megapower/4000series install

Resilience Built In. Flexibility by Design.

Designed for seismic and wind resilience, with optional noise control for safe, reliable operation across diverse sites.

耐地震性能のアイコン

Seismic Resilience Standard

Seismic structural design and an integrated IMU (inertial measurement unit) provide real-time monitoring and protective control, helping reduce fire risks associated with mechanical damage or contactor failure.


耐風性能・台風対策のアイコン

Wind & Typhoon Resilience Standard

When properly anchored, the container is engineered to withstand wind speeds equivalent to a Category 5 hurricane (78-81 m/s).


騒音低減・ノイズキャンセリングのアイコン

Advanced Noise Control Optional

Passive sound attenuation and active noise control help reduce operational noise, enabling greater siting flexibility near communities and facilities.


From Grid-Scale Storage to Industrial Applications

Mega Power 4000 supports front-of-meter and behind-the-meter applications—from grid-scale storage and generation co-location to peak shaving and backup power for factories, logistics facilities, and data centers.

Front-of-Meter (FOM)


  • Grid-Scale Battery Storage

  • Ancillary Services & Balancing Market

  • Capacity Market

  • Wholesale Electricity Market (JEPX)

  • Generation Co-Location

  • Long-Duration Storage (up to 8 hours)

Behind-the-Meter (BTM)


  • Peak Shaving & Energy Cost Savings

  • Business Continuity & Backup Power

  • Renewable Energy Self-Consumption

  • Microgrids

  • Demand Response (DR)

Product Lineup

/megapower/4000series KV

Module Type-A

Module Type-B



Nominal BESS capacity

4,692 kWh

4,233 kWh


Rated BESS capacity

4,222 kWh

3,810 kWh


Operating Voltage Range

1,040 - 1,477 V

1,040 - 1,477 V


Dimension

W 2,438 mm x D 6,058 mm x H 2,591 mm

W 2,438 mm x D 6,058 mm x H 2,591 mm


Container Type

20-ft Standard

20-ft Standard


Weight

< 35,000 kg

< 35,000 kg


Battery Chemistry

LFP

LFP


Cooling Type

Liquid Cooling

Liquid Cooling


Standards & Certifications (including planned certifications)

UN3536; CSS;IEC 62619; IEC 62933; UL 9540A; UL 1973; JC-STAR STAR-1 (Level 1)

UN3536; CSS;IEC 62619; IEC 62933; UL 9540A; UL 1973; JC-STAR STAR-1 (Level 1)


In-House Manufacturing. Made in Japan.

First Deliveries Scheduled for 2027.

Grid Connector for BESS

Factory-Integrated for Faster Grid Connection.

This factory-integrated package combines a power conversion system (PCS), transformer, and switchgear to connect BESS to the grid—streamlining procurement and reducing on-site work for faster utility-scale deployment.

View details


Watch the Mega Power 4000 Series & Grid Connector Product Launch

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Contact Us About Mega Power Series

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