PV Authorized expert

As a TÜV-certified expert for PV systems, we offer a comprehensive service:

  • Assistance for selecting the right components
  • Testing of system planning and design
  • Testing of the used components and their installation
  • Professional installation, static
  • Lightning protection concept
  • Final inspection (if missing, testing according to VDE 0126-23)
  • Quality inspection of the components in our accredited test laboratory
  • Thermography 
  • Characteristic measurement
  • Yield reports
  • EMF measurement of PV systems, compared to ICNIRP and EU limits
  • Examination of the electromagnetic compatibility
  • EMC compliant planting of lines
  • Biological building risk analysis

Errors and defects in photovoltaic systems can also occur despite careful planning and installation. By overvoltage (e.g. lightning) and obsolescence, as well as planning and installation errors and lack of maintenance, module defects such as hot spots and defective bypass diodes, as well as damage to inverters, roofs and buildings can occur.

These deficiencies can result in profit cuts as well as damage to the system. Also a single component or the building can be damaged . Typical consequential damages are water damages due to damaged pantiles or improper perforation of the roof cladding on foil roofs. For this reason, not only the components of the system but also substructure and roof should be included in the assessment of a photovoltaic system.

In order to clarify the responsibilities in the case of a claim and to enforce claims, the exact causes of damage must be established. For this purpose, and also for regular maintenance,Primara uses two particularly effective reliable and cost effective testing methods for PV systems:

  • Thermography 
  • Characteristic measurement

In case of damage or other defect we give concrete improvement and repair suggestions to assist you in selection of competent craft businesses and provide you with advice until the end of the repair work.

Are you interested in buying or selling a building with a PV system? Also in this casePrimara can perform the assessment and creates a reliable valuation report.


Thermography is a method that makes infrared radiation (heat radiation) visible. This allows to identify thermal anomalies at your photovoltaic system in operation; inexpensive, fast and accurate. This allows fast detection and documentation of thermal anomalies without switching off the system or remove any modules.

With a high-resolution infrared camera we can detect the smallest temperature differences of less than 0.05 °C and thus we can draw conclusions about possible defects. For reliable fault detection a solid expertise in the evaluation of the photographic material is required.

Especially on large or difficult accessible generator fields, this method of investigation has prevailed.

Thermography can detect the following defects:

Module failure (also partial failures), defective wiring, moisture, delaminations, cracks in the module, defective bypass diodes and many others.

Characteristic Measurement

With the characteristic measurement, the electrical characteristics of individual modules or entire strings in relation to irradiation and module temperature are determined and used to calculate the power of the module / string under standard conditions (STC). Especially the characteristic measurement is suitable for the detection of defective modules or increased contact resistance, but also of pollution or diffuse shadowing. A comparison with the manufacturer’s ratings is possible and you can make clear statements about the efficiency of the PV generator and highlight errors on the module / string.

Here you find our pv assessor evaluation.