Helios Generación, S. de R.L. de C.V. is a Mexican joint venture created to develop the Helios solar project, to be located in the municipality of Mazapil, in Zacatecas state. The JV is owned by Cemex Energía, the energy unit of Mexican building materials company Cemex S.A.B. de C.V., and Pattern Energy Group LP (Pattern Development), a global renewable energy firm. The project consists of a 150MW photovoltaic plant which is part of the Tuli-Helios Solar Center.