Wind Energy
The Company decided to enter the energy market in 1994 when a new legal framework was enacted in Greece (L. 2244/94. Rokas' decision was based on its experience in the construction of wind farms and hydro plants on behalf of PPC, as well as on the favorable conditions that existed in the market for the development of Renewable Energy projects.

The Company was initially engaged in the construction of wind farms in the early 90s. Following an international tender, it was awarded the construction of 5 wind farms for PPC, with a total capacity of 10.2 W.

Hydro Power Plants and Thermal Power Stations
The Company has also significant experience in the development and construction of hydropower plants (HPPs). Up to present, it has undertaken the construction of generators for small and medium sized HPPs, turbines, gates, gantry cranes and steel pipes. The projects carried out by the Company include the following:

Gantry cranes with lifting capacity up to 350 for Hydro Power Plants (HPPs) of PPC.

HPPs 3x4 MW in Makrohori, Veria, as main contractor for PPC.

Equipment for the HPPs of Sfikia, Asomata, Aoo, Platanovrisi, Mesohora, etc.

Combined cycle Thermal Power Station in Lavrion.

Solar Thermal Energy
The Company showed an early interest in solar energy and photovoltaic systems. In April 2001, it successfully completed the construction of a Photovoltaic Park with capacity of 171.6 W, in Xerolimni (Lasithi), 10 klm southeast of Sitia (Crete), which was one of the first projects of this scale in Greece.