Maintenance is essential to ensuring the uninterrupted and safe operation of your photovoltaic system.

Regular annual maintenance of your photovoltaic system is recommended by all manufacturers of the materials and equipment used to ensure the system’s smooth and long-term operation.

Furthermore, regular maintenance and a corresponding maintenance contract with a certified specialized company are required by insurance companies so that they can compensate customers who own photovoltaic systems in the event of any damage.

SolarService has already undertaken maintenance for ground-mounted solar farms with a total capacity of 150 MW, as well as for more than 300 residential projects, and has the expertise to support you in maintaining your photovoltaic system. Proper maintenance of a photovoltaic system results in the following:
 

• A reduction in breakdowns and, consequently, a reduction in operating costs

• Maximization of the photovoltaic system’s operational efficiency

• Extension of equipment lifespan through preventive maintenance.

• Recording and maintaining a log of equipment status and operation.

 

In summary, preventive inspection and maintenance procedures include:

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• Visual inspection of the entire installation (quarterly or more frequently, if possible).

• Semiannual inspection of all fasteners (mechanical and electrical equipment).

• Semi-annual lubrication of any moving parts.

• Semi-annual cleaning of all equipment.

• Semi-annual anti-corrosion treatment.

• Replacement of any worn materials as soon as they are identified.

• Annual inspection of transformers by a specialized service team (laboratory oil analysis—if the transformer is oil-filled).

• Annual cable resistance measurements.

• Annual measurements of lightning protection and grounding.

Measurements of photovoltaic modules, module strings, electrical panels, inverters, and wiring are performed using specialized, certified instruments.

The entire electrical installation is tested using a specialized multifunctional testing and certification instrument for PV installations, the SOLARTEST 300 N from “HT,” designed for testing single-phase and three-phase photovoltaic systems in accordance with the EN 50160 standard.

The SOLARTEST 300 N enables the simultaneous recording and analysis of all parameters, including environmental parameters (solar irradiance, using the HT303N sensor; ambient and module temperatures, using the PT300 sensor),  and electrical parameters, such as:

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• DC / AC TRMS (single-phase and three-phase) voltage measurement

 

• DC / AC TRMS (single-phase and three-phase) current measurement​

 

• DC / AC (single-phase and three-phase) power measurement

 

• AC (single-phase and three-phase) energy measurement

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• Power factor (cosφ) measurement—single-phase and three-phase

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• Recording of voltage anomalies (dips & peaks, interruptions, unbalances)

 

• Recording of voltage and current harmonics up to the 49th

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• Flicker analysis in accordance with the EN50160 standard

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• Recording of inrush currents with 10 ms resolution

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• Recording of fast voltage transients (spikes) with 5 μs resolution

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• Complete power quality analysis in accordance with the EN 50160 standard

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• Thermal imaging of equipment using a specialized FLIR i7 thermal camera, which enables inspection of all equipment in a photovoltaic installation by detecting temperature differences that typically indicate potential problems. This inspection covers: solar panels, connectors and connections, panel junction boxes, inverters, motors, electrical boxes, and transformers.

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Upon completion of the maintenance and inspection procedures using certified instruments, our company issues a Certificate of Calibration for Preventive Inspection, Testing, and Maintenance of Photovoltaic Systems.

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