Maritime and Off­shore Bat­teries

Electric Boats:

Electric boats have been in operation in one form or another for over 100 years.  At the turn of the 20th century, there were more electric runabouts than gasoline or diesel. All submarines even  today are hybrid electric boats.



  • there is little to no pollution in your local environment
  • there is no smell of diesel fuel, or of diesel exhaust
  • there is no oil in the bilge water
  • electric boats don’t vibrate and are quiet
  • electric boats are very low maintenance
  • can be recharged quickly on shore, with solar and wind power


Main Components:

The main components of the drive system of any electrically powered boat are similar in all cases:


Charger Technology:

  • Mains charger allows the boat to be charged from shore-side power
  • Solar panels can be built into the boat e.g. in the deck or cabin roof
  • Towed generators are common on long-distance cruising
  • Wind turbines are common on cruising yachts


Electric Motor:


  • field-wound DC motors
  • lightweight permanent magnet DC motors
  • AC motors or permanent magnet brushless motors

Battery Technology from aentron

aentron provides turnkey high (> 60 V) and low voltage lithium-ion battery solutions for rugged maritime environments. The aentron battery systems can cope with dust, dirt, extreme water conditions and mechanical loads. aentron batteries show their superiority with their high energy density robust design, thanks to our flexible modular system of energy management as well power configuration.

The aentron maritime battery systems are modular and scalable to your needs. Our systems are designed for voltages of 12 V, 24 V, 48 V  to 900 V DC with capacities from greater than 2 kWh to 50 kWh. All aentron battery systems are IEC 61508 SIL 2 and ISO 16315:2016 compliant and  > IP 66 in tightness.


  • Lithium-ion (Li-NMC) – Ready-to-Install
  • 12 V to 900 V DC
  • > IP66 water tightness
  • Compact and innovative design
  • Intrinsic safety / system isolation
  • Robust design – ALU housing
  • Communication: CANbus
  • Integrated Battery Management System:
    • Voltage, Current, and Temperature management
  • Compliance: UN 38.3, CE, RoHS, IEC 61508 SIL2

Fredy Joder, Director of the Nautic + Technic AG explaining the hybrid-drive in a Nimbus Coupé 305, powered by aentron Lithium Ionen Batterien