Corvus Orca Energy

The Orca Energy ESS represented a shift in the maritime industry when launched in 2016. No other Energy Storage System can compete with the installation count of the Orca Energy system. Outstanding results and the highest level of safety has set the new industry-standard for maritime batteries.

When launched, Corvus Energy combined its industry-leading research and development capabilities with several years of experience from having the largest global installed base of ESS solutions to build the industry’s safest, most reliable, high performing and cost-effective maritime ESS.


Orca Energy is ideal for applications that are in need of both energy and a high amount of power, moving large amounts of energy at an inexpensive lifetime cost per kWh. Typical vessel-types are:

  • Ferries
  • Cruise ships
  • Ro/Ro – Ro/Pax
  • Yachts
  • Offshore vessels
  • Rigs
  • Tugs
  • Fishing vessels
  • Merchant vessels
  • Port cranes
  • Shore charging
  • Fish farms


  • High C-Rates – up to 3C continuous
  • Installed on 250+ vessels around the world
  • Designed for voltages up to 1200 VDC
  • Low installation and commissioning time
  • Low life cycle cost
  • Enhanced reliability with contained power connections
  • Flexible and modularised design
  • Passive single-cell Thermal Runaway protection
  • Scalable capacity and voltage according to vessel requirements
  • Industry-proven Battery Management System (BMS)
  • Remote monitoring capabilities
  • Enhanced EMI immunity design for maritime environments

Corvus Energy safety innovations

Passive single-cell Thermal Runaway (TR) Isolation

  • True cell-level thermal runaway isolation
  • TR does not propagate to neighboring cells
  • Isolation is not dependent on active cooling


Exceeds Class and Flag requirements for TR gas venting

  • Integrated TR gas exhaust system
  • Easily vented to external atmosphere rather than to the battery room



Technical Specifications

Performance Specifications
C-Rate - Peak (Discharge / Charge)Project Specific Values
C-Rate - Continuous (Discharge / Charge)up to 3C / up to 3C
Systems specifications
Single Module Size / Increments5,6 kWh / 50 VDC
Single Pack Range38-136 kWh / 350-1200 VDC
Max Gravimetric Density - Pack77 Wh/kg | 13 kg/kWh
Max Volumetric Density - Pack88 Wh/l
Example Packs
Energy124 kWh (249 kWh for Tall Pack)
VoltageMax: 1100 VDC | Nom: 980 VDC | Min: 800 VDC
Dimensions - Vertical Pack - 124 kWhHeight: 2241 mm | Width: 865 mm | Depth 738 mm | 1628 kg
Dimensions - Horizontal Pack - 124 kWhHeight: 1260 mm | Width: 1730 mm | Depth 738 mm | 1726 kg
Dimensions - Tall Pack - 249 kWhHeight: 3000 mm | Width: 1345 mm | Depth 738 mm | 3375 kg
Example System - 8 Vertical packs
Energy992 kWh
VoltageMax: 1100 VDC | Nom: 980 VDC | Min: 800 VDC
Dimensions 8 x 124 kWhHeight: 2241 mm | Width: 6920 mm | Depth 738 mm | 13 024 Kg
Safety Specifications
Thermal Runaway anti-propagationPassive cell-level thermal runaway isolation with exhaust gas system
Fire suppression reccomendedPer SOLAS, class and Corvus recommendation
Disconnect circuitHardware-based fail-safe for over-temperature and over-voltage
Short Circuit protectionFuses included on pack level
Emergency stop circuitHard-wired
Ground fault detectionIntegrated
Disconnect Switchgear RatingFull load
General Specifications
Class ComplianceDNV , Lloyds Register, Bureau Veritas, ABS, RINA
Type ApprovalDNV , Bureau Veritas, ABS, RINA
Ingress ProtectionSystem: IP44
CoolingForced Air
Vibration and shockUNT38.3, DNV 2.4, IEC 60068-2-6
EMCIEC 61000-4, IEC 60945-9, CISPR16-2-1

Market Segments

Cruise and Ferry

Ro-Pax, Car ferry, Cruise, Ferry, Yachts, Passenger ferries

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Offshore Wind

Non Vessel Wind Installations, Offshore Wind Installation Vessels, Offshore Wind Service Vessels

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Offshore Oil & Gas

DP2 vessels, DP3 Vessels, Oil and Gas, Offshore support vessels

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Tugs and Workboats

Tugs, Workboats

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Fishing and Aquaculture

Fish farm support vessel, Fish farms, Fishing, Fish Farming and Aquaculture

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Deep sea, Short sea

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Subsea Heave Compensation, ROV and Seabed

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