Corvus Blue Whale

The Corvus Blue Whale Energy Storage System is a ground-breaking ESS specifically designed to meet the large energy requirements of emission-free operation over longer periods of time.

The Corvus Blue Whale design is a result of the knowledge gained from having the largest global installed base of ESS solutions combined with our industry-leading research and development capabilities.

The Corvus Blue Whale ESS differs from other ESS technologies available in the market in that it is specifically designed for use in vessels like Cruise, Ro-Pax, Ro-Ro, Mega Yachts, etc where the operational profiles cater for slow charge and discharge rates and a product that enables emission-free sailing over longer periods of time and/or emission-free port stays. The system has been developed with larger installations (>10MWh total system energy) in mind. Low weight and low total system volume have been key design criteria, resulting in a world-leading energy density in a battery room with minimal service aisle requirements.


Blue Whale is ideal for applications that are in need of a large amount of energy at a cost effective kWh price. Typical vessel-types are:

  • Cruise ships
  • Ro-Ro/Pax
  • Yacht
  • Merchant
  • Sightseeing/Workboats
  • Inland Vessels


  • Low C-Rate – designed slow charge and discharge
  • Industry-leading volumetric and gravimetric room energy density
  • Designed for voltages up to 1140 VDC
  • Low installation and commissioning time
  • Very cost-efficient for large installations
  • Enhanced reliability with contained power connections
  • Weight and volume reduced ~30% and ~50 % compared to Orca Energy
  • Flexible and modularised design
  • No service aisles required
  • 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

Example Pack – Corvus Blue Whale Installation

Corvus Energy safety innovations

Passive-Single-Cell-level Thermal Runaway (TR) Isolation

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


Exceeds Class and Flag standards TR Gas venting

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



Technical Specifications

Performance Specifications
C-Rate - Peak (Discharge / Charge)1C / 1C for 20 minutes
C-Rate - Continuous (Discharge / Charge)0,7C / 0,7C
System Specifications
Single Module Size/Increments43 kWh / 80 VDC
Single Pack Range301-4816 kWh / 571 - 1142 VDC
Max Gravimetric Density - Room110 Wh/kg | 9,1 kg/kWh
Max Volumetric Density - Room130 Wh/l
Example Pack - 6 strings
Energy3612 kWh
VoltageMax: 1142 VDC | Nom: 1075 VDC | Min: 1008 VDC
Dimensions Height: 2850 mm | Width: 1390 mm | Length 10 565 mm
Weight30 550 kg
Example System - 4 packs of 6 Strings
Energy14448 kWh
VoltageMax: 1142 VDC | Nom: 1075 VDC | Min: 1008 VDC
DimensionsHeight: 2850 mm I Width: 5560 mm I Length: 10200 mm
Weight122 200 kg
Safety Specifications
Thermal Runaway anti-propagationPassive cell-level thermal runaway isolation with exhaust gas system
Fire suppression recommendedPer SOLAS, class and Corvus recommendation
Disconnect circuitHardware-based fail-safe for over-temperature and over-voltage
Short Circuit protectionFuses included on the module and string level
Emergency Stop CircuitHard-wired
Ground Fault DetectionIntegrated
Disconnect Switchgear RatingFull load
General Specifications
Class ComplianceDNV , Lloyds Register, Bureau Veritas, ABS
Type ApprovalPending
Ingress ProtectionSystem: IP44
CoolingForced air
Vibration and ShockUNT38.3, DNVGL-CG-0339, IEC 60068-2-6
EMCIEC 61000-4, IEC60945, 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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