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ProductUpdated on 10 February 2026

261 kWh C&I ESS - Outdoor, EU-certified, grid-connected.

Business Development Manager, Nordics at SERMATEC Energy Technology GmbH

Riga, Latvia

About

EASYCUBE 261 kWh (SMT-ESS-CUBE261CE) is an outdoor commercial & industrial energy storage cabinet designed for PV self-consumption, peak-shaving, demand control, and grid-connected applications.

Key characteristics:

  • Energy: 261.24 kWh (LFP, 314 Ah cells)

  • Power: 125 kW rated (137.5 kW max)

  • Grid: 400 V, 50/60 Hz, three-phase four-wire

  • Thermal management: Liquid-cooled battery, air-cooled PCS

  • Communication & control

    • Modbus RTU / TCP, MQTT, IEC 104

    • Local HMI with cloud platform support for monitoring and maintenance

  • Compliance

    • IEC 62619, IEC 63056, IEC 62477-1

    • IEC 61000-6-2 / -6-4

    • EN 50549-1 / -2 / -10

    • VDE 4110 / 4120, UK G99, CEI 021/16

    • UN 38.3, RoHS, REACH

    • UL 9540A thermal-runaway test methodology.

Looking for

  • Distribution
  • After-sale services

Applies to

  • Wind & renewable energy
  • Energy storage (batteries, hydrogen, thermal)
  • Smart energy & digitalisation
  • Power grids & electrification
  • Energy & climate solutions

Organisation

SERMATEC Energy Technology GmbH

Large company / Industry

Frankfurt, Germany

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