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.


After completing the project and starting to use it, our O&M team is ready to start its work based on technical specification and instruction provided by engineering and design office.

O&M works in power transmission lines, substations, power plants and distribution networks such as routine visual checks, test and measuring, changing some parts and cleaning insulators in plutoed areas and many other works like these along with being ready for emergency situations, are the main duties of the O&M teams which are perfectly trained and experienced in HOTCO structure.

HOTCO has equipped and trained several O&M teams for fulfilling the clients requirements in this area.




HOTCO has equipped and trained several engineers, technicians, foremen and working teams with the help of our heavy and light machinery and equipment supply to fulfil construction, installation, test and commissioning works in projects such as:

  • Surveying and spotting
  • Access roads making
  • Earth works, earth cuts and excavations
  • Concrete and reinforced foundations
  • Civil works and buildings
  • Steel structures
  • Equipment installations
  • Stringing and clamping
  • Tests and pre-commissioning works
  • Commissioning


Havin been executing EPC projects for years, HOTCO has manged to reach long-term cooperation agreement with the most reputable equipment manufacturers and suppliers both domestically and internationally and has benefited from their services based on the clients vendor lists in different projects to supply the necessary equipment exactly according to the required technical specifications within the scheduled framework of a specific project. Our engineering and design office, along with providing the technical specification for equipment, observes and controls all manufacturing or supply procedures during supply chain from the beginning to the end.




For more than two decades, HOTCO has managed to provide proper services for project execution by employing high technical and engineering capacities of managers and expert teams and benefiting from modern engineering knowledge and relevant softwares.

  • feasibility Studies
  • Initial designs to determine transmission power voltage level, voltage drop criteria, losses and etc.
  • Locating substation and routing the transmission lines.
  • Surveying and conducting geotechnical analysis.
  • Optimization the cost and other aspects of project
  • Providing technical and engineering services for goods and equipment procurement.
  • Providing detail design services such as technical specifications of equipment, Construction details and drawings,  Construction and installation technical specifications, single line diagrams, workshop drawings and etc.
  • Providing test and commissioning specifications and instructions.
  • Providing operation and maintenance specifications and instructions.
  • Providing As-Built drawings.