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
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, with a remaining battery capacity of 20 percent. The ship was back in regular operation the very next day.
The 300-kilometers mark would have been possible in a test designed exclusively for range. Another record journey is already planned for next year in order to be able to implement the data obtained on the currents in Lake Constance and the maximum energy efficiency of the ship.
According to the shipping company Bodensee-Schiffsbetriebe GmbH (BSB) this will be the longest emission-free journey on the water with an all-electric passenger ship to date.
BSB commissioned Ampereship, a sister company of Ostseestaal GmbH & Co. KG, with the design and construction of the 30-meters-long and eight-meters-wide all-electric catamaran in 2021.
The energy concept of the "Insel Mainau" passenger ship has set new standards in shipbuilding. The Stralsund specialists developed their own control and optimization software and integrated it into the system. In addition, a magnetic mooring system and, for the first time,
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