Mega Power 4000 Series
High-Density
Extra-High-Voltage
Up to 4.69 MWh in a standard 20-ft container,
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

Illustration of a Renewable Energy Power Plant Co-location

Resilience Built In. Flexibility by Design.
Designed for seismic and wind resilience, with optional noise control for safe, reliable operation across diverse sites.
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.
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).
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

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;
UN3536;
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.
Watch the Mega Power 4000 Series & Grid Connector Product Launch
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