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Racks · LiqRack · AirRack

1,500 V DC blocks for bespoke projects.

Packs in series with rack BMS, protection and communications: from 172.8 to 372.7 kWh per rack, with liquid or air cooling. The foundation on which we build Powerbolt containers.

See the racksDatasheet (PDF)Spanish version
172.8–372.7kWh
Energy per rack

Four configurations

1,500Vdc
Operating range

900–1,500 Vdc

+20%
LiqRack service life

Compared with air cooling

1C
AirRack 150 Ah discharge

0.5C on the rest

From cell to container

This is how the energy adds up.

Each level adds voltage, thermal management and protection. You can buy the rack from us as a DC block or the complete system.

  1. 01
    314AhLiFePO43.2V

    1.005 kWh

    LFP cell

    3.2 V · 314 Ah

    × 52 in series →

  2. 02

    52.25 kWh

    Pack 1P52S

    166.4 V · liquid cooling

    × 8 in series →

  3. 03

    418 kWh

    Rack 1P416S

    1,331.2 V nominal

    × 12 per container →

  4. 04

    5.015 MWh

    Powerbolt

    1,123.2–1,497.6 Vdc · 20 ft

String used in the BK261 and BK418 Cabinets and the 5.015 MWh Powerbolt (314 Ah cell). With a 280 Ah cell, the same architecture gives the 372.7 kWh LiqRack.

BK integration

What each rack includes

A cell on its own is not a product. Every pack and every rack ships with its own management, cooling and protection, ready to connect to the PCS and the EMS.

  • Integrated
  • In the project
  • Optional
How BK EMS operates
  1. 01

    Inspected LFP cells

    Incoming inspection of every cell before assembly, with serial-number traceability for every pack and every rack.

    Integrated
  2. 02

    Rack BMS

    Monitoring of every pack and rack-level control. Class B functional safety.

    Integrated
  3. 03

    Liquid or air cooling

    Liquid-cooled packs in parallel with ΔT ≤ 2 °C between cells, or parallel air cooling.

    Integrated
  4. 04

    Protection

    Rack electrical protection built in as standard.

    Integrated
  5. 05

    Communications

    To connect the rack to the plant's EMS and SCADA.

    Integrated
  6. 06

    PCS, fire suppression and enclosure

    When the rack goes into a Powerbolt, we add the inverter, fire suppression and enclosure HVAC.

    In the project
  7. 07

    BK EMS

    Optional for projects integrating other equipment: EMS Core, Pro or Max depending on scale.

    Optional

Racks

Up to 372.7 kWh per rack, at 1,500 Vdc.

Two liquid-cooled LiqRacks and two air-cooled AirRacks, all with an operating range of 900 to 1,500 Vdc. Data from the 2026 catalogue datasheets.

LiqRack 280Ah 1P416S, BK EnergiesLiquid cooling

LiqRack 280Ah 1P416S

Published datasheet
372.7kWh
Rated energy
1,331.2V
Rated voltage
  • IEC 62619
  • IEC 61000
  • UL 1642
  • UL 1973
Catalogue datasheet (PDF)Request a quote

Full datasheet · Racks

Rack specifications
ParameterLiqRack 280Ah 1P416SLiqRack 280Ah 1P384SAirRack 280Ah 1P416SAirRack 150Ah 1P360S
CellLFP 280 AhLFP 280 AhLFP 280 AhLFP 150 Ah
Configuration1P416S1P384S1P416S1P360S
Pack8 × LiqPack 1P52S8 × LiqPack 1P48SAirPack 1P16SAirPack 1P24S
Rated energy372.7 kWh344 kWh372.7 kWh172.8 kWh
Rated voltage1,331.2 V1,228.8 V1,331.2 V1,152 V
Operating range900–1,500 Vdc900–1,500 Vdc900–1,500 Vdc900–1,500 Vdc
Charge/discharge rate0.5C0.5C0.5C1C
CoolingParallel liquid coolingParallel liquid coolingParallel air coolingParallel air cooling
Dimensions (W × D × H)860 × 1,153 × 2,333 mm860 × 1,068 × 2,333 mm1,142 × 835 × 2,418 mm960 × 788 × 2,341 mm
Weight≈ 3,200 kg≈ 3,000 kg≈ 3,200 kg≈ 1,700 kg
Functional safetyClass BClass BClass BClass B
CertificationsIEC 62619 · IEC 61000 · UL 1642 · UL 1973GB/T 36276 · IEC 62619 · IEC 61000 · UL 1642 · UL 1973GB/T 36276IEC 62619 · IEC 61000

LiqRack: liquid-cooled packs in parallel, +20% service life compared with air cooling, ΔT between cells ≤ 2 °C, IP67 at pack level and operation from −40 to 60 °C (catalogue, p. 6). AirRack: modular design and up to 1C discharge on the 150 Ah version (catalogue, p. 7). Indicative parameters, subject to final design.

Packs

The modules each rack is built from.

Cells, BMS and protection in one module. Packs are supplied integrated into their rack.

Thermal management

Liquid or air? It depends on the power and the site.

LiqRack · liquid cooling

+20%service life vs air cooling

High-voltage rack with liquid-cooled packs in parallel.

  • ΔT between cells ≤ 2 °C
  • IP67 at pack level
  • Operation from −40 to 60 °C
  • Class B functional safety

AirRack · air cooling

1Cmax. discharge (AirRack 150 Ah)

Rack with parallel air cooling: a simpler, more cost-effective architecture.

  • Up to 1C discharge on the 150 Ah version
  • Operating range from 900 to 1,500 Vdc
  • Modular design
  • Class B functional safety

Applications

Who the racks are for

Integrators, equipment manufacturers and projects that need a bespoke DC block.

Utility-scale energy storage

1,500 Vdc racks for building multi-MWh DC blocks with your own PCS.

LiqRack · AirRack

PV + BESS hybridisation

DC blocks for hybridising existing solar PV plants with the project's own inverter.

LiqRack

Safety and certifications

Safety from the pack up.

System safety starts with the chemistry, the pack and the testing. These are the barriers and the standards declared in each datasheet.

  • 01

    Class B functional safety

    All racks, with a rack BMS that trips on any deviation.

  • 02

    Sealed packs

    LiqPacks are IP67 and operate with ΔT ≤ 2 °C between cells.

  • 03

    Traceability

    Serial number for every pack, rack and system, with a quality dossier.

  • 04

    Factory testing

    100% of units pass FAT before leaving the factory.

Line of finished 43 kWh battery packs lined up
Finished 43 kWh packs, before integration into a rack.

Standards declared in the datasheet

  • IEC 62619

    Industrial lithium battery safety

  • IEC 61000

    Electromagnetic compatibility

  • UL 1642

    Lithium cell safety

  • UL 1973

    Batteries for stationary use

  • GB/T 36276

    Lithium batteries for energy storage (China)

Each rack has its own list of certifications in the datasheet (catalogue, pp. 6–7).

BK technician assembling LFP cells into a pack

Inspection, welding, BMS, assembly and testing. Every pack goes through the same checks before it ships.

Rest of the range

From cell to container.

See the full range

Need racks for your project?

Tell us the voltage, the energy and the PCS you work with. We will send you datasheets, certificates and lead times.

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