118 hours non-stop flight without liquid fuel

The solar powered aircraft work by storing heat and light energy and convert them to electrical energy. The aircraft will have very long wingspan (72m) longer than the size of an Airbus 340(63.4m), in which solar 17,000 photovoltaic cells are layered. The energy gained from solar power is stored in lithium polymer batteries. The charge, discharge and temperature of the batteries are controlled by a computerized management system, which saves energy, and optimize the usage. The engines and the other energy required equipment are powered by these lithium batteries. All the equipment including instruments are specially designed to use minimum electricity. As of today (July 3, 2015) solar powered aircraft has a record 118 hours of flying covering a historic 7200km across pacific from Japan to Hawaii

Image source: buro247.com

Image source: foxsports.com