Learn about Eldu in less than 3 minutes

At ELDU we offer a global energy service to all kinds of companies. We have more than 50 years’ experience and can proudly state that we are sector leaders.
We originated as a company that specialized in the erection and maintenance of high voltage electrical installations, but we soon grew and branched out into other fields. We are currently providing the following services:
  • Engineering
  • Erection and preventive, predictive, corrective and routine maintenance for different types of facilities
  • Carrying out energy audits
  • Technical and legal updates to comply with the regulations in force

We have a staff of 450 highly-qualified professionals, a turnover of 64 million Euro a year and a portfolio of more than 6,000 loyal clients.

We work all over Spain and also abroad: Chile, Argentina, Brazil, Nicaragua, Venezuela, Mexico, the United States, France, Portugal, Nigeria and South Korea.


At Eldu we offer a wide variety of services tailor-made to suit the needs of each client: engineering, assembly of installations and facilities, energy management, comprehensive maintenance, air conditioning, audits, training, etc.
Everything we do is focused on achieving maximum energy efficiency for facilities and installations, reducing operating costs to a minimum and maximizing saving.


Our aim is to offer a top-quality global energy service that is safe and environmentally friendly. We seek to provide our clients with complete satisfaction and we guarantee that their activities will be as profitable as possible.

If you place your trust on us, we will pay back this trust with:

  • The very highest quality standards and benefits to ensure satisfactory operation of your installations and facilities.
  • One single contact: only one person is answerable to you
  • Management cost and service performance optimization
  • Autonomy for you, so you can concentrate on your activity
  • Coordination and quality in providing the service
  • Optimization of electric power costs, controlling consumption conditions and making the most of market options
  • Service flexibility and customization: we have several service levels that are adapted to your requirements and preferences