A final selection for the electric motor to power the production model of the Sun Flyer 2 has not yet been selected, but Bye Aerospace said the power plant will soon be announced. The energy storage system has, however, been selected: the LG Chem MJ1 lithium-ion battery cells, which offer 260 Wh/kg of energy density. The battery will provide a 3.5-hour flight endurance for the Sun Flyer 2, Bye said, a significant improvement over Pipistrel's Alpha Electro electric two-seat trainer, which only has a one-hour endurance with reserve.