Cable solutions for battery energy storage systems

Connect battery storage systems with site infrastructure, substations, renewable generation, and the wider power grid.

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Battery energy storage cable solutions | NKT

Connect battery storage assets across the site and grid

Battery storage facility connected to transformer and substation equipment

Battery storage facilities can require cable connections between storage equipment, transformers, substations, renewable generation assets, and the wider power network.

Typical applications can include:

Grid connection of utility-scale battery energy storage systems
Connections between battery storage facilities and substations
Integration with onshore wind and solar installations
Intra-site connections between electrical equipment
Integration into new or existing transmission and distribution networks

Depending on the project configuration, these applications may involve medium-, or high-voltage cable systems. Each project requires an assessment of the electrical load, connection voltage, site layout, cable route, installation conditions, and network interfaces.

Reinforce power grids for decentralised energy

NKT has signed multi-year framework agreements with EnBW for the supply of low- and medium-voltage power cables in southern Germany. The agreements support grid expansion, distribution network reinforcement, and the connection of renewable energy assets.

The collaboration reflects the wider need to prepare power networks for more complex, bidirectional power flows from decentralised sources, including solar, wind, and battery storage.

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Support battery storage cable systems throughout operation

Battery storage projects bring together cable products, grid infrastructure, installation requirements, and long-term system operation. NKT’s lifecycle services can support the cable system beyond installation and help customers manage changing requirements over time.

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Resolve critical BESS cable-system requirements

Battery energy storage cable systems must be specified for the project’s electrical load, installation environment, grid interface, and operating profile.

Repeated cycles create changing electrical and thermal loads. Cable design must account for conductor heating, cooling periods, route conditions, and the expected operating profile. By evaluating these conditions early, NKT specialists can help define a cable solution that is suited to the project’s duty cycle and thermal environment. Thermal performance during frequent charging and discharging is a key BESS cable requirement.

Requirements depend on the project fire strategy, installation location, applicable standards, and cable function. They may cover flame propagation, smoke emission, corrosive gases, circuit integrity, and fire-resistant routing. NKT experts can help align cable selection with the project specification. The applicable cable construction, classification, and testing standard must be confirmed for the selected solution.

Cable-system performance depends on decisions made during planning, installation, testing, commissioning, and operation. Depending on the project and regional scope, NKT can combine cable expertise with installation support, testing, monitoring, maintenance, and other lifecycle services. This gives customers access to technical support beyond cable delivery and can help protect system performance over time.