The prototype boat SOLARIS-50 is designed for use as a floating platform — a cafe with a passenger capacity of 20-25 people for short walks along rivers and lakes. Technical characteristics length-50ft, width-13ft, displacement 13t. power el. engines 2x13kw (2x40hp) cruising speed-8-10kn, the solar panel is about 43 square meter, 8 kW, the battery capacity is designed for 5-6 hours of continuous operation after the end of the charge from the sun.