On July 10, 2025, the electric solar passenger ship "Insel Mainau," designed and built by Ampereship GmbH, completed a range test on Lake Constance. During a 19-hour continuous journey, the all-electric catamaran covered exactly 211.3 kilometers on the lake…<p><p>https://www.marinelink.com/news/electric-passenger-ship-completes-range-528154</p></p>