STEP 1 Inspection
Review of planning variables by external technical experts
Step 1.1

Creation of project planning questionnaire

All planning-related data are written down in a planning questionnaire and clearly documented. The integrity of the roof is confirmed by using the roof inspection protocol. The protocol includes information on damage that came about before the installation of the PV system, along with other information.
Step 1.2

Wind load calculation

We carry out a customised wind load calculation for your project in cooperation with the Institute of Industrial Aerodynamics (I.F.I.). All the relevant parameters, such as location, environment, topography and surrounding building development, are evaluated by the I.F.I. and the specific wind load is calculated for your project.
Step 1.3

Static friction coefficient measurement

The coefficients of static friction and dynamic friction are determined with the help of the measurement protocol provided by PMT. During this process, at least three tests are carried out for each roof surface when wet and when dry. The measurement is taken in accordance with the measurement procedure defined by PMT using our measurement tools. Of course, we provide the high-tech protective mats.
Step 1.4

Proof of compressive strength

Even insulation damage is a risk that should not be underestimated when installing aerodynamic photovoltaic mounting systems. To prevent possible long-term damage, we ask that you provide us with data about the static compressive strength and the insulation installed on your roof. Our employees then calculate the compressive strength for your project and certify the results with the insulation certificate from PMT.
Step 1.5

Data reconciliation and plausibility check

The entire chain of causality is reviewed by the external engineering firm Knörnschild & Kollegen for possible deviations from the previously determined planning parameters. Has the snow load been calculated and assessed correctly? Have the wind load specifications been implemented consistently? These questions are reviewed in detail to confirm that the planning is accurate.
STEP 2 Training
Professional training of the installers by specialist personnel
Stufe 2.1

Theoretical training

What rules must be followed during installation? What is the structure of the best installation process? What errors can be prevented from the very beginning? What safety specifications must be implemented? These and other questions are answered during the theoretical training. We also go into project-specific details when necessary. We plan a half-day (approx. four hours) for the theoretical training. This gives our project partners the essential insights into installation and safety.
Step 2.2

Practical training

Under the specialist supervision of PMT, the installation teams work independently to build the systems as close to real life as possible. You will be able to use and further develop your theoretical knowledge. This is how we ensure that installations will be carried out flawlessly in real-life conditions. We go to each participant individually and solve the installation challenges together. We plan a half-day (approx. four hours) for the practical part of the training.
Step 2.3

Quality assurance training

During the training session, we go into quality assurance during installation. We instruct the teams on how to critically review the individual steps and analyse their own actions. This is how we ensure correct implementation right at the start of installation. This reinforces the quality and the safety of your system in a sustainable way.
Acceptance of the finished, mounted PV system by specialist personnel
Step 3.1

System inspection by drone

The entire system is inspected by drone beforehand if possible. The layout is inspected for general compliance with the design planning. We specifically check the distance to obstructions, border areas and corners as well as the system components to each other. These distances have a significant influence on the ballast and thus on the stability of the system.
Step 3.2

System inspection and check

Are all the components on site and correctly installed? Are all the click connections inserted and locked? We can only ensure these things by carrying out a direct visual inspection of the system on the roof. The primary decisive factor as to whether the installation has been carried out flawlessly is compliance with specified torques and ballast planning.

PV inspection

Solar panel configuration

  • Block size
  • Number of solar panels

Configuration on roof surfaces

  • Distance from parapet
  • Distance from edge

Solar panel support surface

  • The solar panel is centred and straight on the tower and base
  • The solar panel is positioned correctly on the latching lug

Detailed inspection of substructure

In the final step, we inspect the entirety of the selected system units. First, we examine the corner areas and make sure all the individual components have been installed correctly. If we discover problems in the installation, we check the entire system block. During this process, we always proceed based on the size of the system and the safety requirements.

Connection profiles

  • Click connection locked in place


  • Click connection locked in place


  • Click connection locked in place

Cross and ballast braces

  • Present in the correct locations
  • Correctly mounted and screwed in
  • Tightening torque test

End and middle clamp

  • Click connections locked in place
  • Latching sheet in 90° position
  • 100% support area
  • Tightening torque test


  • Total ballast per unit according to specifications
  • Correct distribution of individual weights under the unit
  • Safe positioning
  • Ballast stones correctly fastened with clamps in the edge area
If all the steps have been carried out successfully, your system will get the “Go ahead”!

If all the steps have been carried out successfully, your system will get the “Go ahead”!

Christian Ziegler
Project Manager
+ 49 (0) 9225 95500 contact now
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