Corvus Blue Whale

Corvus Energy has combined its industry leading research & development capabilities and knowledge gained from having the largest global installed base of ESS solutions to develop a new groundbreaking energy storage system. The new ESS meets the energy needs required to operate emissions-free for longer periods of time.

The Corvus Blue Whale ESS is different than the ESS technology already in use. It is designed for vessels that are in need of slow charge and discharge rate, such as Cruise, Ro-Pax, Ro-Ro, and Mega Yachts. It allows these ships to sail emissions-free for longer periods of time or to stay emissions-free in port. Size is typically from 20 -50 MWh, which means that low weight and volume is essential.


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


  • Low C-Rate – designed for slow charge and discharge
  • Weight reduced 30% compared to Corvus Orca Energy
  • Volume reduced approximately 50% compared to Corvus Orca Energy
  • Cost optimized
  • Flexible and modular design
  • Enhanced reliability
  • Low installation and commissioning time
  • Safety beyond class requirements
  • Enhanced EMI immunity design for maritime environments
  • Contained power connections, enhanced reliability
  • Designed for pack voltages from 1008V – 1142V
  • Unlimited scalability
  • Economical upfront and through-life costs = lower total cost of ownership
  • Industry-proven 5th generation BMS
  • Easily monitored through the Watchman™ ESS Advisory Portal

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


Additional fire suppression system not required.

Technical Specifications

Performance Specifications
C-Rate - Peak1C
C-Rate - Continous0,5C
Operational Specifications
Pack Sizing571-1142V/ 300-2400kWh
Pack example
Energy2400 kWh
VoltageMax: 1142 VDC I Nom: 1075 VDC I Min: 1108 VDC
CoolingForced air
Dimensions (vertical)Height: 2000mm I Width: 1200mm I Length: 8600mm
General Specifications
EMCIEC 61000-4, CISPR16-2-1,3, IEC 60945
Ingress ProtectionSystem: IP44
Vibration and ShockUNT 38.3, DNVGL-CG-0339, IEC 60068-2-6
Class ComplianceDNV-GL, Lloyds Register, Bureau Veritas, ABS
Safety Specifications
Thermal Runaway anti-propagationCell-level; DNV-GL Pt.6 Ch.2, NMA 2016 circular
Fire suppression reccomendedPer SOLAS (machinery space)
Disconnect circuitHardware-based fail-safe-for over-temp, over voltage
Faults communicatedOver-voltage, under-voltage, over-temperature
Short Circuit protectionFuses included
Disconnect switchgear ratingFull load
Emergency stop circuitHard-wired
Ground fault detectionIntegrated
Battery Management System
Battery management systemCorvus Gen. 5
Control InterfaceModbusTCP
Corvus WatchmanTM CompatibilityIntegrated
Cell BalancingDynamic

Market Segments

Cruise and Ferry

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

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

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Fishing and Aquaculture

Fishing, Fish Farming and Aquaculture

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Tugs and Workboats

Tugs, Workboats

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Heave Compensation, ROV and Seabed

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Deep sea, Short sea

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