Why PV module quality is becoming a critical risk in 2026

Photovoltaic (PV) modules, commonly known as solar panels, are the core components that convert sunlight into electricity. Their quality directly impacts the performance, reliability, and long-term return of solar energy projects.

Furthermore, the PV module manufacturing market is changing fast. New regulations, growing production capacity, and advances in technology are reshaping how modules are made. At the same time, supply chains are becoming more complex as materials and components continue to shift.

For buyers, this means one thing. You need to stay alert. Choosing the right suppliers and products now requires a more careful and informed approach.

One of the most pressing issues facing the industry is the increase in module defects. As the manufacturing of modules continues to grow, new failure patterns are emerging in high-impact processes. These include layup precision, lamination integrity, and junction box assembly.

These issues point to deeper challenges. In particular, they show weaknesses in manufacturers’ ability to manage solar bill of materials (BOMs), which refers to all the components and materials used to build a PV module, from solar cells to wiring and protective layers. It is also becoming increasingly difficult to maintain consistent process controls. And if left unchecked, these gaps can create risks for long-term project performance.

At Kiwa PI Berlin, we support PV module buyers as they face the above mentioned dynamic market conditions. As a global technical advisor and quality assurance provider, we deliver:

• Technical diligence,
• Procurement support,
• Quality assurance services across the lab, factory, and field.

Since module defects are on the rise, strong risk management is essential to protect investments and ensure long-term success in solar projects.

Contact Kiwa PI Berlin to discuss how to reduce risk, verify supplier performance, and secure long-term project outcomes.