H anergy Holding Group Ltd is a multinational group that finances and builds green energy plants (hydroelectric, wind, solar) and owns the world's largest factory of thin film solar panels, especially fit for architectural integration.

Created in 1994, based in Beijing, the company has more than 10000 employees and offices in America, Europe, Middle East and Africa.

Exalto, in collaboration with Azzero CO2, has designed and installed 4 PV plants (15000 square meters of asbestos replaced by 837 solar kW) in L’Aquila (Central Italy). The plants have been financed by Hanergy, and its thin film panels have been used.