Quieter Marine Genny

Whisper Tech of NZ have developed an efficient marine generator/
water-heater based on an improved "Stirling" engine.
 for yachts .
It uses a litre of kero per hour to produce 800W @ 12v.
Much is made of its quietness.
Occupies  5 cu ft, weighs 90kg.
Detail
http://www.whispertech.co.nz/
http://www.argonet.co.uk/users/bobsier/new5.html
Jeff Gilbert