The system is designed for remote areas without access to a grid, such as small islands, mines and rural areas, the manufacturer said.
At a ceremony in La Muela, about 20km south-west of Zaragoza in north-east Spain, Gamesa chairman Ignacio Martin said: "At present, more than 1.2 billion people lack access to electricity. Rural areas of India, south-east Asia, Africa, islands such as Haiti, Indonesia and the Philippines, and other remote corners of the plant, such as jungles and deserts, stand to benefit from these offgrid solutions which can generate cheaper and cleaner power."
The prototype comprises a G52 850kW turbine, 245kWp of solar panels and three 222kW diesel generators. It will also be capable of storing 500kWh of power once the battery has been connected, due to take place over the summer, Gamesa said.
"Development of this class of technology is expected to reach 1,200MW in the coming years. The advantage of our system is based on its flexibility: it can be tailored for customer needs by increasing, reducing or eliminating capacity in any of the technologies used," explained Gamesa director of business development David Mesonero.
Gamesa will also offer a turnkey solution, including transport, installation and operation of the system.
The move to the off-grid segment is part of the company's 2015-2017 development plan and the business could add value from 2018, it said.