When a power plant is flooded
In the fall of 2024, a once-in-a-century flood hit the EVN photovoltaic park in Dürnrohr. The plant, with 35,600 modules, had been in operation for just one year when it was completely flooded. The key question: Are the modules still safe and functional—or do they need to be replaced?
A blanket response is expensive or risky. A complete replacement causes millions in losses. Random samples are not sufficient to guarantee safety. This is exactly where 2nd Cycle comes in: with a standard-compliant testing procedure that, for the first time, can reliably analyze large quantities.
From uncertainty to clear decision-making
EVN opted for a comprehensive test with 2nd Cycle. More than 200 modules were tested in accordance with ISO 2859-1 – from insulation measurements in wet conditions to electroluminescence and dark curves. The result was clear: critical errors in several test procedures, safety risks, and performance losses.
The consequence: all modules had to be replaced. This ruled out any uncertainty about continued operation and enabled a well-founded investment decision to be made. A few weeks later, the plant gradually resumed operation and has since been supplying thousands of households with electricity from solar energy once again.
Why testing PV modules is essential
Defects in PV modules are not always visible. Cell cracks, hotspots, or defective bypass diodes can lead to long-term performance losses, safety risks, and failures.
Particularly in large systems, the quality of the diagnosis determines:
- Safety: Prevention of fire and electric shock hazards.
- Cost-effectiveness: Clarity on whether repair or replacement is advisable.
- Sustainability: Extending the service life of functional modules.
- Sustainability: Extending the service life of functional modules.
Automated testing for large plants
2nd Cycle is currently the only provider capable of testing PV modules in large quantities in a cost-effective manner that complies with standards. This is made possible by a semi-automated testing facility that will operate fully automatically in the future.
The test steps include, among other things:
- Dry and wet insulation measurement (IEC 61215-2)
- Electroluminescence images
- Dark curves
- Bypass diode tests
- Visual inspections and documentation
The result: reliable data, transparent documentation, and a clear basis for decision-making for operators.
EVN reference project: A milestone
The collaboration with EVN demonstrates the importance of systematic testing. Without 2nd Cycle, either risky continued operation or blanket replacement would have been necessary—both with incalculable consequences. The tests made it possible to clearly assess the damage and restore safety.
Frequently asked questions about testing PV modules
1. Why should PV modules be tested?
Defects in PV modules are often invisible. Cell cracks, hotspots, or faulty bypass diodes can reduce performance and cause safety risks. An inspection provides reliable data on whether repair or replacement is necessary.
2. How is a standard-compliant PV module test carried out?
The tests include insulation measurements (dry and wet), electroluminescence imaging, dark characteristic curve measurements, and bypass diode tests. This provides a complete picture of safety and functionality.
3. When does it make sense to test photovoltaic modules?
Whenever there are doubts about functionality—for example, after natural disasters, in the event of power losses, or to safeguard large investments. Testing is particularly crucial for PV power plants with several thousand modules.
4. How much does it cost to test PV modules?
The costs depend on the scope and number of units. However, the economic benefit is decisive: operators avoid misguided investments in unnecessary replacements and receive a clear basis for decision-making.
5. What are the advantages of automated PV module testing?
Automated processes enable large quantities to be tested in accordance with standards and economically. Operators receive a quick, fact-based damage analysis with clear recommendations.
6. Does testing extend the service life of solar modules?
Yes—by identifying and removing defective modules, intact modules can continue to be used. This saves resources, reduces costs, and increases sustainability in the operation of PV systems.
Conclusion: Greater security for PV investments
For operators of photovoltaic power plants, clarity is key: Which modules are still operational? Where is there an urgent need for action? 2nd Cycle's standard-compliant tests lay the foundation for fact-based investment decisions – safe, economical, and sustainable.
Schedule a consultation appointment now to find out how you can have your PV modules tested.: Contact
Hier geht's zum Zeitungsartikel: https://www.meinbezirk.at/tulln/c-lokales/photovoltaik-park-duernrohr-versorgt-wieder-7700-haushalte_a7684348
Fotocredits © EVN / Daniela Matejschek