Suntech is supplying photovoltaic (PV) panels for the alliance’s UK solar projects.
Greenfield will offer EPC services while youmex will arrange construction loans and long-term project financing as well as sell the PV solar power plants to investors.
Greenfield managing director Helmut Kube said: "Together with the expertise of Suntech and youmex, our alliance is well-positioned to solidify a strong presence within the UK’s Solar PV market."
Suntech manufactures 60 cell polycrystalline modules which the company claims are better suited for weak light performance markets like the UK.
Suntech CEO Eric Luo said: "We believe that this alliance will serve as another catalyst for growth in the UK’s solar market."
"Our polycrystalline silicon modules recently ranked above industry standards in a technical review conducted by UK-based consultancy OST Energy and received the VDE-Quality Tested certification, which recognizes high quality products that go beyond existing standards in the photovoltaic industry."
Suntech has delivered over 30 million PV panels or 8GWs of installed capacity to more than 1,000 customers in 80 countries.
Greenfield has constructed solar farms of more than 650MW in the last few years and connected them to the grid in major European countries which include the UK, Germany, Czech Republic and Italy.