Corvus Dolphin Energy

The Dolphin Energy ESS is specifically designed for lightweight applications. Dolphin Energy combines outstanding energy density and a reasonable power density with the highest level of safety, setting new industry standard for maritime energy storage systems.

The flexible design of the Dolphin Energy allows the system to be stacked in various directions enabling high space efficiency in compact installations.


Dolphin Energy is ideal for ships with long, slow charges and discharges where lightweight is essensial.
Typical vessels are:

  • Tourist vessels
  • Canal boats
  • Cruise Ships
  • Sightseeing vessels
  • Ferries


  • Low C-rate for slow charge and discharge
  • Low weight
  • Designed for voltages up to 1000 VDC
  • Flexible installation
  • Low life cycle cost  
  • Easy and safe plug and play connections
  • Very flexible and modularized 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-level Thermal Runaway (TR) Isolation

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



Technical Specifications

Performance Specifications
C-Rate - Peak (Discharge / Charge)1,1C / 1,0C for 10 seconds
C-Rate - Continuous (Discharge / Charge)0,5 C / 0,4C
System Specifications
Single Module Size / Increments11 kWh / 128 VDC
Single Pack Range11-88 kWh / 128-1024 VDC
Max Gravimetric Density - Pack177 Wh/kg | 5,6 kg/kWh
Max Volumetric Density - Pack100 Wh/l
Example Pack - 7 Modules
Energy77 kWh
VoltageMax: 896 VDC | Nom: 805 VDC | Min: 672 VDC
Dimensions (Vertical)Height: 2380 mm | Width: 655 mm | Depth: 500 mm | 436 kg
Example System - 4 Packs
Energy308 kWh
VoltageMax: 896 VDC | Nom: 805 VDC | Min: 672 VDC
Dimensions - 4 x 77 kWhHeight: 2380 mm | Width: 2620 mm | Depht: 500 mm | 1743 kg
Safety Specifications
Thermal Runaway anti-propagationPassive cell-level thermal runaway isolation
Fire suppression reccomendedPer SOLAS, class and Corvus recommendation
Disconnect circuitCell individual fail-safe for over-temperature and over-voltage
Short Circuit protectionFuses included on cell, module and pack level
Emergency Stop CircuitHard-wired
Ground Fault DetectionIntegrated
Disconnect Switchgear RatingFull load
General Specifications
Class ComplianceDNV GL, Lloyds Register, Bureau Veritas, ABS, RINA
Type ApprovalPending
Ingress ProtectionSystem: 2X
CoolingForced air
Vibration and ShockUNT38.3, DNV 2.4
EMCIEC 60945-9

Market Segments

Cruise and Ferry

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

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