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Cabinets · DC cabinet

241, 261 or 418 kWh in an outdoor cabinet.

Liquid-cooled LFP battery cabinets without an inverter: they connect to the project's PCS with no risk of circulating currents or short circuits between clusters. For sites where a container won't fit.

See the three sizesDatasheet (PDF)Spanish version
BKENERGIES
241–418kWh
Three cabinet sizes

BK241 · BK261 · BK418

768–1,331Vdc
Rated voltage

Match your PCS window

314Ah
3.2 V LFP cell

0.5C · DOD 100%

IP55
Outdoor installation

Liquid cooling · ΔT < 2 °C

Architecture

More cells in series, more energy and more voltage.

All three cabinets use 3.2 V, 314 Ah LFP cells. From the BK241 to the BK418 they go from 240 to 416 cells in series, so energy and voltage rise together: from 768 to 1,331.2 Vdc nominal.

So size is chosen on two criteria: the energy you need and the inverter's DC voltage window. For more energy, use several cabinets in parallel. If you want the inverter built into the same unit, see Power Pro.

  1. BK241240 cells in series · 648–864 V241 kWh768 Vdc
  2. BK261260 cells in series · 676–936 V261.25 kWh832.0 Vdc
  3. BK418416 cells in series · 1,081.6–1,497.6 V418.00 kWh1,331.2 Vdc

BK integration

What's inside a Cabinet

The Cabinet is the energy side of the system. We supply the rest: inverter, protection, control and operation, sized for your point of connection.

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

    3.2 V LFP cells · 314 Ah

    From 240 to 416 cells in series. 0.5C and 100% rated depth of discharge.

    Integrated
  2. 02

    BMS

    Monitoring of every cell and every pack, with early detection of imbalances.

    Integrated
  3. 03

    Liquid cooling

    Core temperature difference below 2 °C. Pump included; system auxiliary consumption ≤ 4,000 W (220 Vac).

    Integrated
  4. 04

    DC protection

    Protection on each cluster for series connection to the PCS with no circulating currents or short circuits between clusters.

    Integrated
  5. 05

    PCS

    Bidirectional inverter selected for DC voltage and power. We integrate it into the project.

    In the project
  6. 06

    Detection and suppression

    Sized to the site risk assessment. The cabinet passes the UL 9540A test at unit level.

    In the project
  7. 07

    BK EMS

    EMS Core or Pro: self-consumption, peak shaving, arbitrage and backup, with 24/7 monitoring.

    In the project

BK241–BK418 datasheet

Three sizes, all the data.

Select a size or click its column header. Data from the 2026 catalogue datasheet.

BK261, BK EnergiesLiquid cooling

BK261

Published datasheet
261.25kWh
Rated energy
832Vdc
Rated voltage
1P260S
Configuration
  • IEC 62619
  • IEC 62933
  • IEC 61000
  • UL 1973
  • UL 9540A
Catalogue datasheet (PDF)Request a quote

Full datasheet · DC Cabinets BK241 · BK261 · BK418

DC Cabinet specifications BK241 · BK261 · BK418
ParameterBK241BK261BK418
Battery
Rated energy241 kWh261.25 kWh418.00 kWh
Configuration1P240S1P260S1P416S
Rated voltage768 Vdc832.0 Vdc1,331.2 Vdc
Voltage range648–864 V676–936 V1,081.6–1,497.6 V
Rated current (0.5C)157 A157 A157 A
Max. current (5 min)193 A193 A193 A
Depth of discharge100 %100 %100 %
Mechanical and environmental
Dimensions (D × W × H)On requestOn request1,300 × 1,300 × 2,373.5 mm
WeightOn requestOn request3,930 kg
ProtectionIP55IP55IP55
CoolingLiquidLiquidLiquid
Altitude≤ 2,000 m≤ 2,000 m (up to 4,500 m on request)≤ 2,000 m (up to 4,500 m on request)

Common to the series (catalogue, p. 10): 3.2 V · 314 Ah LFP cell, core ΔT < 2 °C, IP55 outdoor, passes UL 9540A at unit level. System auxiliary consumption ≤ 4,000 W including pump (220 Vac). Charge and discharge temperature for guaranteed service life: 25 ± 5 °C. Certifications: IEC 62619, IEC 62933, IEC 61000, UL 1973 and UL 9540A.

Applications

Where a Cabinet fits

Where you need more energy than an all-in-one and less space than a container.

Industry and C&I

Industrial estates and factories: several cabinets next to the transformer substation, with no container civil works.

261 – 418 kWh

PV + BESS hybridisation

Small and mid-sized solar PV plants looking to shift output to high-price hours.

Several in parallel

Uninterrupted backup (STS)

Data centres and commercial premises with critical loads and little plant-room space.

241 – 418 kWh

Safety and certifications

Safe at unit level.

The Cabinet passes the UL 9540A test at unit level, which assesses whether thermal runaway in one cell spreads to the rest of the cabinet.

  • 01

    UL 9540A at unit level

    Test passed: thermal runaway in one cell does not spread through the cabinet.

  • 02

    No circulating currents

    Series connection to the PCS with no risk of circulating current or short circuits between clusters.

  • 03

    Uniform temperature

    Liquid cooling with less than 2 °C core temperature difference: less degradation, longer life.

  • 04

    IP55 outdoor

    IP55 outdoor cabinet with liquid cooling, up to 2,000 m altitude (BK261 and BK418: up to 4,500 m on request).

Battery pack with its connections and protection devices during integration
Battery pack during integration and pre-dispatch testing.

Standards declared in the datasheet

  • UL 9540A

    Thermal runaway propagation test

  • UL 1973

    Batteries for stationary use

  • IEC 62619

    Industrial lithium battery safety

  • IEC 62933

    Grid-connected energy storage systems

  • IEC 61000

    Electromagnetic compatibility

Certifications declared in the Cabinets datasheet (catalogue, p. 10).

Rest of the range

From cell to container.

See the full range

How many Cabinets do you need?

Tell us the energy, power and inverter you have or plan to install. We'll come back with the configuration and a quote.

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