Solar-pioneers Heike und Michael Köhler have spent over 5000 days on board of their yachts and sailed over 75.000 NM all around the world. After 23 years using motorboats and sailboats on several oceans, Michael and Heike Köhler were sure that there must be a better way for the energy supply and propulsion of yachts. From 2005 to 2009 they tested alternative power sources on yachts, with energy production and consumption measurements and focus on self-sufficient power supply as well as electric propulsion.
From 2005 Heike and Michael gave lectures about these topics and published a book called “Energieversorgung auf Yachten” (“Energy Supply on Yachts”). Based on the results of five years and 15,000 NM of sailing on a test catamaran they started the design and construction of the