Solar-powered boat circumnavigates the world

The video discusses a solar-powered vessel equipped with over 500 square meters of solar panels. It measures 31 meters long and 15 meters wide, with a top speed of 14 knots. The solar panels power two 60-kilowatt electric motors, and six lithium-ion batteries provide up to three days of power without sunlight. The vessel's flaps can extend to increase generating capacity. It has traveled 53,000 kilometers around the globe in 584 days.

How many kilowatt electric motors are powered by the solar panels?

What is the maximum duration the lithium-ion batteries can provide power without sunlight?