The sunlight absorption by solar cells is more at high altitudes than on the ground or earth stations this makes solar systems suitable for powering small aircraft’s single and two seater aircraft are now flying in Germany China and Switzerland in fact Germany and USA are planning a whole line of aircraft powered by solar cells for propulsion these aircraft‘s rely on electric engines brushless DC motors the motor is extensively used in the defence and aerospace industries in India the lithium ion batteries are charged by solar cells which in turn supply electrical energy to the electric engines high-efficiency solar cells are now available with extra concentrates also solid-state design that have the potential to deliver three timesEnergy density at less than half the cost per KWH of the present batteries will be available shortly with this development some of the manufacturers are also planning four seater aircraft’s
