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Quotes as of: 18.09.2026
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ESS DC Cable

Flexible 1500 V DC cable for fixed connections between battery racks, combiner equipment and power conversion systems.

Typical Scenarios
Key Specifications
  • Battery rack interconnection
  • Containerised ESS wiring
  • Power conversion system DC links
  • Fixed indoor and outdoor storage routes

 

  • Application voltage: up to 1.5 kV DC
  • Conductor: Class 5 fine-stranded tinned copper
  • Insulation and sheath: electron-beam cross-linked, halogen-free polyolefin compounds
  • Installation: fixed; suitable for dry, damp, wet, indoor and outdoor environments
  • Temperature range for fixed installation: −40°C to +120°C
  • Nominal cross-section range: 1.5 to 400 mm²
  • Design basis: based on EN 50618

 

Select cable specifications:
ESS DC
Certifications & complance:

Product Highlights

Flexible DC Routing

Battery racks, combiner equipment and PCS connections concentrate high DC current in limited enclosure space. ESS DC Cable uses a fine-stranded tinned-copper conductor to make fixed high-current links easier to route without forcing the cable against busbars or terminals. The broad 1.5 to 400 mm² range lets the same cable family cover small internal connections and large DC feeders within the storage system.

LSZH ESS Construction

Battery containers and power-conversion cabinets place many power cables in a confined environment where fire behaviour matters. Electron-beam cross-linked halogen-free insulation and sheath materials reduce flame propagation, smoke density and corrosive gas generation compared with conventional halogen-containing constructions. This supports a fire-conscious cable strategy inside ESS equipment while retaining the electrical insulation required for high-voltage DC service.

High-Temperature Outdoor Performance

The cross-linked insulation and sheath system is designed for fixed service from -40°C to +120°C and provides resistance to UV, ozone, weather, oils, fuels, alkalis and acids. These properties are valuable where ESS cables pass through battery cabinets, container floors or outdoor equipment and experience heat, condensation and industrial contamination. The tinned Class 5 conductor also supports reliable flexible routing in these exposed storage-system environments.

Application Areas

Designed for Battery racks, ESS containers, Power conversion systems and Fixed storage plant cabling.

 

Battery racks

ESS containers

Power conversion systems

Fixed storage plant cabling

Technical Data

FAQ

Recommend

GENERAL DATA
  • Single-core DC power cable for fixed Energy Storage System installation
  • Nominal voltage: AC U₀/U 1/1 kV; DC U₀/U 1.5/1.5 kV
  • Maximum DC voltage: 1.8 kV in a non-earthed conductor-to-conductor system
  • Test voltage: 6.5 kV AC
  • Minimum bending radius: 5 × cable diameter for static use; 15 × cable diameter for occasional flexing
  • Temperature range, fixed installation: -40°C to +120°C
  • Ambient temperature: -40°C to +90°C
  • Maximum conductor temperature: +120°C

 

CABLE STRUCTURE
  • Fine-stranded non-porous tinned copper conductor according to IEC 60228 Class 5 / VDE 0295 Class 5
  • Core insulation: electron-beam cross-linked halogen-free polymer compound, type EI 110
  • Outer sheath: electron-beam cross-linked halogen-free co-polymer compound, type EM 104
  • Tight-fit outer sheath designed to remain strippable from the core insulation by a longitudinal cut

 

PROPERTIES
  • UV-, ozone- and weather-resistant for long-term outdoor ESS installation
  • Suitable for fixed installation in dry, damp and wet environments
  • Cross-linked polymer system provides resistance to oils, fuels, alkalis and acids
  • Halogen-free and flame-retardant construction

 

TESTS
  • Conductor construction and resistance according to IEC 60228
  • Flame retardance according to IEC 60332-1-2 and IEC 60332-3-24
  • Halogen-free material construction according to EN 50525-1
  • Thermal endurance basis according to IEC 60216-2 for the stated fixed-installation temperature capability

 

 

DIMENSIONS & ELECTRICAL DATA

 

Nominal size mm² Insulation mm Sheath mm Nominal OD mm Conductor resistance at 20°C Ω/km
1 × 1.5 0.7 0.8 4.6 13.7
1 × 2.5 0.7 0.8 5.0 8.21
1 × 4 0.7 0.8 5.4 5.09
1 × 6 0.7 0.8 6.0 3.39
1 × 10 0.7 0.8 7.2 1.95
1 × 16 0.7 0.9 8.7 1.24
1 × 25 0.9 1.0 10.6 0.795
1 × 35 0.9 1.1 12.2 0.565
1 × 50 1.0 1.2 14.4 0.393
1 × 70 1.1 1.2 16.4 0.277
1 × 95 1.1 1.3 18.4 0.210
1 × 120 1.2 1.3 20.2 0.164
1 × 150 1.4 1.4 22.4 0.132
1 × 185 1.6 1.6 25.2 0.108
1 × 240 1.7 1.7 28.6 0.0817
1 × 300 2.0 1.9 32.0 0.0654
1 × 400

Dimensions are nominal.

 

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Will the approval documents match the exact cable you quote?

Where a certificate, test report or DoP is part of the approval package, we match it to the quoted cable construction and the applicable scope. A document for one version is not treated as approval for another simply because the model name is similar.

Is ESS DC Cable a standard cable designation such as H1Z2Z2-K?

No. ESS DC is an application and product-family description rather than a standardised cable designation. The current construction uses a 1.5 kV DC design with Class 5 tinned copper and cross-linked halogen-free compounds, with EN 50618 used as a design basis. It should not be treated as H1Z2Z2-K or as EN 50618 certified unless the issued product documents specifically state that.

Does the current ESS DC Cable have a CPR classification?

No CPR class is currently stated for the ESS DC Cable. Halogen-free or flame-retardant performance does not by itself establish a CPR classification. If CPR is required for the project, the exact cable construction and supporting documentation must be confirmed before quotation.

What information do you need from us to select an ESS DC cable?

We need the connection point, such as rack-to-combiner or combiner-to-PCS, together with DC voltage, operating current or required conductor size, route length and installation conditions. Terminal drawings or available connection space are useful where large conductor sizes are involved.

Can ESS DC cable be supplied as finished leads with lugs?

This can be reviewed once the conductor size, finished length and termination are defined. Send the required lug or terminal part number, drawing or connection dimensions and confirm whether the assembly is single-ended or double-ended. The finished assembly specification is confirmed separately from the bulk cable.