The experimental Solar Impulse 2 took off 6:30 a.m. Monday from Kalaeloa Airport for a training flight.
The aircraft has been on Oahu since July. Officials say its departure to begin the next leg of its worldwide flight to Phoenix, Arizona was been delayed due to battery damage.
The Solar Impulse flew to Hawaii from Japan in July as a part of a record breaking journey around the world. They say the aircraft made the journey without a single drop of fuel.
The batteries were fixed by Monday morning and was tested during the training flight.
The first test flights will be low altitude with higher altitude flights scheduled later.
If everything goes to plan, the plane could depart as early as April 15.