Heesen Electra's hybrid engine system embraces the very best of 21st-century technology. Vast improvements in alternative power systems allow us to meet our increasingly important aims of diminishing our environmental impact. The hybrid system offers irresistible advantages over a conventional diesel-powered system: cleaner, quieter and more fuel efficient.
The engine can be operated in four different cruising modes:
The technology behind hybrid engines is complex, but the operation is simple. Benefits are undeniable, notable from your first time cruising in smooth silence.
Hybrid Mode drives the yacht at speeds up to 9 knots. Power is derived purely from the yachts’ e-motors and generators. Hybrid Mode is beautifully silent, with maximum noise levels in the owner’s stateroom reaching just 46 dB(A) – the sound of softly falling rain. Boxed and insulated generators result in vibrationfree cruising, whilst fuel consumption is no more than 70 litres per hour.
For speeds between 9 and 12 knots, Economic Mode allows you to switch off the generators. Running off the main engines alone, the emotors supply the hotel load.
This is the most conventional mode. The e-motors are switched off, with the generators providing power to the hotel load. The main engines drive the yachts’ propellers. In Cruising Mode, Home achieves speeds between 12 to 15 knots.
Boost Mode enables Heesen Electra to hit her top speed of 16.3 knots with ease. The yacht runs on the main engines and generators, whereby the e-motor is fed on the gearbox.
The exterior of this 50-metre yacht is designed by Omega Architects and it’s our second yacht with hybrid propulsion. In this case ‘Hybrid’ means that the yacht can draw on two sources of power for propulsion: diesel mechanical and diesel electrical. Either or both sources can be used at the same time. No batteries. This provides more flexible power management, which means better efficiency, less noise and less vibration. Up to 9 knots the yachts will be as silent as when at anchor.
She is not only fuel efficient, but we have also taken great care in living space optimalisation. We believe this yacht has the most living space of any superyacht under 500GT.