We ran the following long-term tests:
2005-2009 with a converted Fountaine Pajot 37, in which we installed the same household appliances as on our current boats – fridge, freezer, washing machine, electric oven, induction cooktops, coffee-machine, bread-maker and a water-maker. In addition we installed solar-panels and wind-generators and all necessary equipment to measure the energy production and consumption.
2010-2013 with Solarwave 46, a dedicated solar-yacht which we launched in 2009. More then 12.000 miles exclusively solar-powered, you can find more information here: https://www.silent-yachts.com/history/
We found out, that spending less is the key factor, so we worked a lot on reducing the energy consumption e.g. by insulation the hull to increase the efficiency of the AirCon and we optimised the hull and the propulsion system for higher performance and less consumption.