The two companies will jointly develop, invest, finance, construct, and operate the project, which is scheduled to be commissioned in March 2016.
ET Solar CEO and president Dennis She said: "It demonstrates our ability to handle every aspect of utility-scale solar plants from planning and financing, through construction, and all the way downstream to O&M. With our integrated capabilities and global experience, we are able to achieve the lowest possible LCOE.
"In this particular project, we were not only competing against other players for the contract; we were also racing against time to be eligible for the highest tariff rate.
"Once again, our ability to integrate all the required resources and move faster than other companies got us to the finish line first."
The construction is planned to be started in the last quarter of this year.
ET Solar will serve as the co-development partner and technology sponsor, as well as the investor in the project.