Input Type 3 Phase
Voltage 350 to 528 Volts
Frequency 40 to 70 Hz
Shore Cords Single or Dual
Power Factor ≥ 0.95
Output Power Ratings 50, 60, 75, 100, 125, 150, 200, 250, or 300 kVA
Parallelable up to 900 kVA
Frequency 50 or 60 Hz ±0.1%
Overload 100% Continuous
110% for 2 hour
150% for 60 seconds
200% for 20 seconds
Environment Protection Over/Under Voltage, Loss of Phase, Over Current, Short Circuit and Over Temperature
Temperature Range 0°C to +45°C
Humidity 0% to 95%, Non-Condensing
The ShorPOWER® ULTRA HV series of frequency converters are designed to be the workhorse of the marine industry. Unlike other converters available they are built from a single power module of up to 150kVA that can be paralleled to create a system up to 900kVA. This marine shore power converter is highly reliable and is designed to provide years of service, there are currently hundreds of Ultra converters providing clean reliable power to many of the most prestigious yachts in the world.
Worldwide Power
The ULTRA HV will automatically connect to any high voltage marina power source worldwide and provide clean, stable and reliable power for the yacht. Fully compatible with all types of marina breakers and complying with all marine shore power supply regulations, having an ULTRA HV on board makes the yacht a truly global vessel.
Advanced Power Design
The ShorPOWER ULTRA HV frequency converter utilizes state-of-the-art technology including the latest in power semiconductors and grain oriented transformer technology, all controlled by a high speed digital control system to produce a pure output sine wave.
Reliable Power
The onboard guests do not want to be aggravated by flickering lights, black-outs and generator starts caused by fluctuations in the marine power supply. Regardless of the dock power quality the ULTRA HV will always produce stable and reliable power. This reliability is achieved by manufacturing the converter using only the highest quality components and by engineering the converter for actual marine use.
Maximize Marina Power
Many yachts have to reduce their air conditioning and galley loads when in the marina to prevent overloading the circuit breaker on the dock and losing all power. By balancing the currents in the shore cord the ULTRA HV converter increases the amount of available power from the marina by as much as 20%.
Marine Engineered
Designed from the ground up, based on years of marine experience, the converter is engineered to operate in the worst marine conditions such as high ambient temperature and humidity. It has been extensively tested to ensure that when large loads such as motors and compressors start there are no fluctuations of the output power.

  • Automatically connects to any worldwide marina power system.
  • Works with any RCD / GFCI circuit breaker


  • Balances the current in the input phases regardless of output load imbalance.
  • Available with fully integrated dual shore cord inputs for increased capacity.
  • Reduced current at start up prevents nuisance trip of marina breaker.


  • Provides protection against marina voltage transients.
  • Output power is stable even when large output loads are applied.
  • Precise output voltage and frequency regulation.
  • Regulation remains precise even with unbalanced loads.
  • Generous overload capability so no need to start generator during peak times.


  • State of the art power semiconductors and grain oriented transformers.
  • Extensive protection and diagnostic system.
  • Network Compatible – Fully integrated Ethernet-based Communication Data Link (CDL) system.


  • Seamless power transfer between ShorPOWER ULTRA HV and the generator.
  • Parallelable for increased capacity.
  • Color touchscreen remote control panel.
  • Alternate enclosures available including a modular configuration.