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Photovoltaic solar energy, as renewable source, shows a more respectful energy formula for the environment than any other conventional energy, since there are unlimited sources to cover energy requirements.

A reliable maintenance focus on this sort of systems enables to optimize its capacity and reduce to minimum their downtime; which directly affects costs-effectiveness of the investment involved.

ESA’s policy is to offer its clients a top quality integral monitoring carried out by highly qualified personnel, suitable technical support and to make use of tools, machinery and personnel as security measures, under the responsibility of a maintenance company.

ESA, also, offers a thoroughly monitoring which support and accomplish photovoltaic systems maintenance.

Two types of actions must be cleared, in order to cover all required processes during the lifespan of an installation with the guarantee of a correct functioning, production optimization and maximizing lifetime.


Its purpose is to anticipate equipment and systems failure in order to optimize functioning efficiency levels. Periodically visits are carried out in this sort of maintenance with the following tasks:

  • Photovoltaic module cleaning.
  • Landscape maintenance.
  • Maintenance of Security and Communications System.
  • Electrical system maintenance.
  • Monitoring system performance.
  • Monitoring photovoltaic module performance.
  • Structure or tracker maintenance.
  • Global maintenance: Equipment components inspection, such as, huts temperature control, huts and investers cleaning, inspection of auxiliary lightning, and so on.
  • Inspection of the security system.


Replacement and required repair are all included, in order to guarantee an accurate system functioning. It mainly consists of field actions to solve problems.


The following possible failures can be detected in a photovoltaic system:

  • Modules glass breakage.
  • Water penetration and oxidation of module/cell interconnections and welded connections.
  • Connection failure and water infiltration in the terminal box of the module.
  • Soiling or partially shaded.
  • Structure corrosion.
  • Tracker mechanical failure.
  • Fuse breaking caused by over-intensity.
  • Weather station failures.
  • Troublesome on inverters starting first thing in the morning.
  • Hot spots on modules.
  • Manufacturing defects.

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