We ensure that our clients’ projects meet the required quality standards



Our specialized, engineering services ensure sustainable solutions for our clients’ specific needs.  

We assist developers and engineering, procurement and construction (EPC) companies through all the stages of their renewable energy projects, from the design engineering to the operational phase. Our value-added services and industry knowledge provide professional assurance that the project design meets the required quality standards, critical elements for long-term asset performance.

We also offer several specific engineering services for energy storage systems.

Full range of our engineering services are described below: 


Planning and Development

  • Owner’s engineering
  • Energy production estimates
  • Technological sufficiency studies
  • EPC and O&M contracts support

Implementation and Construction

  • Basic and detailed engineering
  • EPC contract support
  • Construction quality assurance programs
  • Technical inspection during the construction stage
  • Construction and commissioning oversight
  • High-voltage and grid connection design
  • Structural analysis of design and construction

Highlighted projects

Amin PV Plant

Country: Oman

Capacity: 105 MW

Service(s): Quality Assurance and Quality Control; Owner’s engineering

Client(s): Marubeni

Enertis Applus+ acted as Owner’s Engineer for the 105 MW Amin solar photovoltaic (PV) plant located in the Sultanate of Oman. The project is so far one of the biggest solar parks in the Middle East to use bifacial photovoltaic modules, which can withstand desert temperature fluctuations, and, with the signing of a 23-year power purchase agreement (PPA), it is one of the world’s first utility-scale PV project to have an oil and gas company, Petroleum Development Oman LLC (PDO), as the sole wholesale buyer of energy.

Enertis Applus+ has also carried out Final Acceptance Test (FAT) related services during the production of bifacial PV modules in China, as a first-class factory inspection and testing company in Asia, leading and monitoring every technical-related aspect, with a special focus on the approval of the detail design for the project. Also, Enertis Applus+ has deployed an experienced on-site team to supervise the construction activities, ensure compliance with the contractual obligations and verify the quality of the works.

Portfolio of PV projects in Spain

Country: Spain

Capacity: 112 MW

Service(s): Owner’s Engineering

Client(s): RWE Renewables

Enertis Applus+ has been appointed as Owner’s Engineer for three solar photovoltaic plants property of RWE Renewables. These solar PV plants, located in Spain, have a total capacity of 112 MW. The Owner’s Engineering services are provided during the design, planning, construction, and commissioning phases, in order to ensure the projects’ quality throughout their lifetime.

Some of our clients

Get in touch for further information

Aitor Ilundain

Head of Engineering & Construction Management