Welcome to AePVI

The smart inspection concept for any PV plant worldwide

Issues with reduced yield? Approaching end of warranty? Aerial PV inspection identifies and locates faults precisely.

We combine and automate classic and preventive inspections of solar power plants with image-based methods like thermography, electroluminescence and UV-fluorescence measurements, and with IV-curve recording by day and night, isolation issues detection, serial number scan, and geography data referencing.

To this end we employ tripod- and drone-based sensor systems, providing a cost-effective check-up by systematic sampling or 100% screening. EL measurements offer a comprehensive and exact assessment of faults on cell level and thus represent the tower of strength of the AePVI concept.

  Download our brochure


Electroluminescence analysis and combined measurements on-site by spezialised tripod- and UAV-systems


Inspection by remote-controlled measurement devices and power supplies such as AePVISwitch


Electroluminescence measurement without dismounting and transport of solar modules

100 % Screening

Complete electroluminescence measurement or systematic sampling with specialized UAV- and tripod-systems such as AirLabONE and SlideAirONE


Measurements in one step: additional IV-curve-measurements by day and night, or isolation checks

High volume

Electroluminescence measurement for any PV-plant size worldwide, up to 1.000 pictures per hour with SlideAirONE

Images/ videos

Depending on request and failure type, featuring automatized image analysis

Our work

Impressions of on-site inspections

Electroluminescence inspections

comprehensive - detailed - clear

Solar panels produce electricity during the day. If connected to a power supply in darkness, however, they emit radiation in the near-infrared light spectrum, which is not visible by the naked eye.

High-resolution electroluminescence (EL) images look similar to x-ray images. Active cells appear bright to grey, while inactive or damaged cells appear dark to black. The grey scale seen in the images allows to determine the cause and the amount of damage already on-site.

As a result, specific solar panels can be selected for further laboratory tests.

With this image-based qualitative measurements, damages caused by mechanical stresses such as transportation, installation, hail, snow can be quickly detected. Moreover deterioration, broken cells, interconnections and defective by-pass diodes can be recognized as well as malfunctioning panels and strings.

Aerial EL testing is the most cost-efficient method currently on the market for the clear and early detection of solar systems affected by potential-induced degradation (PID).

This testing method can furthermore be used to verify the recovery of PID-affected systems. It also enables the reproduction of sytem documentation in case of false or missing string plans.

  Download our brochure


April 2019
High Definition Visual Inspection
More info on LinkedIn

March 2019
Lost substring or defect Short-Circuited Bypass Diode?
More info on LinkedIn

February 2019
Short-Circuited Bypass Diodes - ACTIVE or DEFECT?
More info on LinkedIn

January 2019
Training concept developed for aepvi service technicians
More info on LinkedIn

December 2018
Clearly identify and document causes of faults using electroluminescence drones
More info on LinkedIn

November 2018
Training concept developed for aepvi-UAV pilots
More info on LinkedIn




Dr. Jan Schlipf

Managing Director



Andreas Fladung

Managing Director (CEO)


What our partners say


Get in touch



Legal Notice c; c; Privacy Policy


Aerial PV Inspection GmbH
HRB 21551, Aachen


+49 (0)241 990 3312


Im Johannistal 31a
52064 Aachen

© 2019