China will allow more types of electricity to be connected to the national grid free of charge, a move aimed at improving the energy-saving industry and reducing carbon emissions.

State Grid Corp, the largest State-owned power utility company, said on Wednesday that power projects including solar, natural gas, biomass, wind and ocean energy, will be allowed to connect to the national grid with the companies responsible for construction fees and meters.

Photovoltaic solar power producers have been able to hook into the grid since October.