Yazd Solar Farm
Solar farms EPC projects are one of our main fields
Submarine Power Cable
One of the best ways to connect islands to mainland
South Pars Gas Field
Power Distribution Networks O&M Projects.
Noravan 400 kv S/S
Armani’s third line substation in Noravan city
Renewable Energies
Combined solar and wind farm
Ahvaz 4 power plant electrical connection to Gotvand (400 KV T/L)
Asaluyeh 400 kv S/S
Asaluyeh 1000 MW powerplant 400/230/66 kv substation
NGL 1200 T/L
Terminal Tower and the next one.


Power transmission lines and substations have been the main field of HOTO activities during these two decades from its establishment. Most of our completed projects are electrification of oil and gas fields, petrochemical and industrial plants, factories and etc via high voltage transmission lines and substations.

Some main parts of Iran National Grid in the voltage of 400 kv or 230 kv transmission lines and substations such as Ahwaz-Masjed soleyman 400kv line, Fasa-Asaluyeh 400 kv line, Ahwaz-Gotvand 400 kv line and so many other similar projects are executed by HOTCO.

HOTCO has a very brilliant experience in oil and gas fields and plants electrification such as Homa-Shanol oil field, Aghar-Dalan oil field, NGL 1200 and 1300 petrochemical plants and so on.

Along with above mentioned projects in Iran, HOTCO has a very good experience in CIS countries such as Iran-Armenia third transmission 400 kv transmission line and Armenia (Noravan) 400/220 kv substation.

With all these projects, HOTCO has introduced itself as a pioneer company in this field in these regions and is ready to repeat its successful career in similar projects.

Upgrading the existing lines and substations along with working on smart grids is one the most important duties of this section in HOTCO. These days HOTCO is very active in African Countries market and Afghanistan as well to get some transmission lines and substations projects there with the help of our local partners.

Our references in the past regional and international tenders shows that we have a very good ability in providing very competitive prices and technical proposal in this fields.