Siemens has landed a $9 billion deal to build gas and wind-power plants in Egypt, signing contracts on Wednesday in a ceremony witnessed by President Abdel Fattah El-Sisi.

The energy deal, the single biggest order Siemens has received, is expected to boost Egypt’s power generation by 50%, the Germany company said in a press statement.

The projects will add 16.4 gigawatts to Egypt’s national grid, and include up to 600 wind turbines and a rotor-blade manufacturing facility. They will provide training and jobs for up to 1,000 people, Siemens said.

The Germany company will work with Egyptian partners Elsewedy Electric and Orascom Construction, in supplying three natural gas-fired combined cycle power plants, each with a capacity of 4.8GW.

Each of the three power plants – Beni Suef, Burullus and New Capital – will be powered by eight Siemens H-Class gas turbines.

“The plants will add power to the grid in stages. Plans call for an initial 4.4GW to go online before summer 2017 and the full 14.4GW to become available 38 months after the financing has closed and advance payments have been received. Once completed, the three power plants will be the largest in the world,” Siemens said in a statement.

“Siemens will also deliver up to 12 wind farms in the Gulf of Suez and West Nile areas, comprising around 600 wind turbines and an installed capacity of 2GW.”