Powerbolt · 20 ft container

Up to 6.25 MWh in a 20 ft container.

DC block with liquid-cooled racks, BMS, HVAC and fire suppression built in. Plug & play with minimal civil works, ready for transport and connection to the PCS: the unit we use to build multi-MWh plants.

Datasheet Datasheet (PDF)Spanish version

6,058 × 2,438 × 2,896 mm · 20 ft

5.015MWh
Energy per container: 95%
DC round-trip efficiency: 1,123–1,498Vdc
DC block voltage: ≤ 46t
Weight

Inside

4,992 cells, twelve racks, one block.

In the 5.015 MWh Powerbolt, each rack strings 416 LFP cells of 314 Ah up to 1,331 V nominal. Twelve racks in parallel add up to 5.015 MWh with 95% DC efficiency at 0.5P.

Closed 5 MWh battery container with a technician in front — 5.015 MWh block, closed and ready for shipping.

Liquid-cooled battery racks inside a 5 MWh container — 1P416S racks with 314 Ah LFP cells.

Open 5 MWh container with the battery racks accessible from the front — Front-accessible racks for maintenance.

Configuration: 1P416S × 12
Current per rack: 157 A discharge · 193 A charge (5 min)
Associated PCS: 6 × 417 kW or 2 × 1.25 MW
Communication: CAN · Ethernet

BK integration

From DC block to operating plant

The container is the energy block. Around it we integrate power conversion, medium voltage, plant control and operation. A single party accountable for the plant meeting the grid operator's requirements.

Integrated
In the project
Optional

How BK EMS operates

01
314 Ah LFP cells
4,992 cells in 12 racks of 416 in series (5.015 MWh). 8,000 cycles to 70% state of health (0.5P, 25 ± 2 °C). The 6.25 MWh model uses 587 Ah cells.
Integrated
02
Rack-level and system BMS
Monitoring of every cell, balancing and protection of every rack. Class B functional safety.
Integrated
03
Liquid cooling and HVAC
Liquid circuit per pack with ΔT ≤ 2 °C, thermal and acoustic insulation and self-contained container HVAC.
Integrated
04
Detection and suppression
Aerosol fire suppression built into the container (3.34 and 5.015 MWh); three-level protection, pack, cluster and container, on the 6.25 MWh model.
Integrated
05
PCS and transformer station
Six 417 kW PCS or two 1.25 MW PCS per container, plus whatever medium-voltage transformer the point of connection requires.
In the project
06
BK EMS, PPC and SCADA
EMS Max for utility scale: forecasting, arbitrage, balancing services and system operator setpoints. PPC for power control at the point of connection.
In the project
07
Plant communications
CAN and Ethernet in the block to the plant controller. IEC 61850 and Modbus at EMS level.
Integrated

Models and datasheet

Three models, one 20 ft container.

3.34 MWh for smaller points of connection, 5.015 MWh as the standard block and 6.25 MWh with a 587 Ah cell for maximum density. Data from the 2026 catalogue datasheet.

Liquid cooling

Powerbolt 5.015 MWh

Published datasheet

5.015MWh
Energy @ 0.5C: 95%
DC RTE @ 0.5P: 12racks
1P416S · 314 Ah

GB/T 36276
IEC 62619
IEC 63056
IEC 62477
IEC 61000
IEC 62933-5-2
UN 38.3

Catalogue datasheet (PDF)Request a quote

Full datasheet · Powerbolt

Scroll the table sideways if you can't see every model

Powerbolt specifications
Parameter	Powerbolt 3.34 MWh	Powerbolt 5.015 MWh	Powerbolt 6.25 MWh
System
Rated energy	3,343.97 kWh	5.015 MWh @ 0.5C	6,251 kWh
Power (0.5P) / associated PCS	1,672 kW	2,500 kW (PCS: 6 × 417 kW or 2 × 1.25 MW)	On request
DC voltage	1,123.2–1,497.6 V	1,123.2–1,497.6 V	1,331.2 V rated
DC efficiency (RTE)	—	96% @ 0.25P · 95% @ 0.5P	On request
Battery
Cell	LFP 3.2 V · 314 Ah	LFP 3.2 V · 314 Ah	LFP 587 Ah
Configuration	—	1P416S × 12 racks	1P416S × 8 racks
Max. discharge / charge current	—	157 A × 12 / 193 A × 12 (5 min)	On request
Service life	8,000 cycles (0.5P, 25 ± 2 °C, 70% SOH)	8,000 cycles (0.5P, 25 ± 2 °C, 70% SOH)	On request
Environment
Operating temperature	−20…50 °C	−20…50 °C	On request
Ingress protection rating	IP55	IP55 (IP67 pack)	IP54 (customisable)
Anti-corrosion	C4	C4	C5
Cooling	Liquid	Liquid	Liquid
Control
Fire suppression	Aerosol	Aerosol	Three levels: pack, cluster and container
Communication	CAN · Ethernet	CAN · Ethernet	On request
Functional safety	—	Class B	—
Mechanical
Dimensions (W × D × H)	6,058 × 2,438 × 2,896 mm	6,058 × 2,438 × 2,896 mm (20HC)	6,058 × 2,438 × 2,896 mm
Weight	≤ 35 t	≤ 46 t	≈ 50 t

20 ft liquid-cooled container (catalogue, p. 18). Certifications: 3.34 MWh GB/T 36276 and UN 38.3; 5.015 MWh GB/T 36276, IEC 62619, IEC 63056, IEC 62477, IEC 61000, IEC 62933-5-2 and UN 38.3; 6.25 MWh on request. Indicative parameters, subject to final design.

Indicative sizing

How many Powerbolts does your plant need?

Move the target energy. We calculate with 5.015 MWh containers at 0.5C; the actual design depends on the point of connection, the duration and the expected degradation.

Target energy20 MWh

5 MWh190 MWh

4
5.015 MWh containers: 10 MW
Power at 0.5C (2 h): 59 m²
Container footprint (excluding aisles): 24
417 kW PCS (or 8 × 1.25 MW)

Simplified calculation without degradation margins or auxiliary services. Our largest system delivered: 188 MWh in Lianyungang (China).

Applications

Built for MWh-scale plants

The Powerbolt is the building block when energy is measured in megawatt hours.

Utility-scale energy storage

Standalone BESS for arbitrage, balancing services and capacity markets.

5 – 188 MWh

PV + BESS hybridisation

Alongside an existing solar PV plant: charges with midday curtailed energy and sells in the evening, without losing the regulated remuneration (RD 917/2025).

2 – 4 h

Off-grid systems

Plug & play delivery with little civil work: designed for remote sites and fast deployment.

Microgrids

Safety and certifications

Contain any incident within the container.

Integrated fire suppression, sealed packs and self-contained HVAC. Every level of the system has its own barrier.

01
Layered protection
IP55 container with IP67 packs (5.015 MWh); customisable IP54 on the 6.25 MWh model. C4 or C5 anti-corrosion.
02
Aerosol fire suppression
Integrated aerosol fire suppression; on the 6.25 MWh model, three-level protection: pack, cluster and container.
03
Climate-controlled
Thermal and acoustic insulation and self-contained HVAC: the cells stay within their temperature window all year round.
04
Functional safety
Class B on the 5.015 MWh Powerbolt, with centralised control. Operation from −20 to 50 °C.

Technical compartment of a Powerbolt with electrical panel and fire suppression cylinder — Technical compartment: control panel, protection devices and fire suppression system.

Standards declared in the datasheet

GB/T 36276
Lithium batteries for energy storage (China)
IEC 62619
Industrial lithium battery safety
IEC 63056
Safety of lithium batteries for energy storage
IEC 62477
Safety of power converters
IEC 61000
Electromagnetic compatibility
IEC 62933-5-2
Safety of electrochemical energy storage systems
UN 38.3
Transport of lithium batteries

Certifications for the 5.015 MWh Powerbolt as stated in the datasheet (catalogue, p. 18). The 3.34 MWh model declares GB/T 36276 and UN 38.3; those for the 6.25 MWh model are available on request.

Rest of the range

From cell to container.

See the full range

Multi-MWh project?

We help you with sizing, grid access and connection, engineering and operation. From feasibility study to plant in operation.

Talk to our engineers View products

Up to 6.25 MWh in a 20 ft container.

4,992 cells, twelve racks, one block.

From DC block to operating plant

314 Ah LFP cells

Rack-level and system BMS

Liquid cooling and HVAC

Detection and suppression

PCS and transformer station

BK EMS, PPC and SCADA

Plant communications

Three models, one 20 ft container.

Powerbolt 3.34 MWh

Powerbolt 5.015 MWh

Powerbolt 6.25 MWh

How many Powerbolts does your plant need?

Built for MWh-scale plants

Contain any incident within the container.

Layered protection

Aerosol fire suppression

Climate-controlled

Functional safety

From cell to container.

Multi-MWh project?