Marc Hauser

Many new solar plants commissioned in recent years fail to meet performance expectations. The reason? Strings that are too short. How is it possible that many well-established and experienced installers fall into this trap? In this article, I will first delve into the technical issue and then offer my honest opinion on why we are suddenly observing many new sizing issues in 2025.

Manufacturers of photovoltaic components face fierce competition. They invest heavily in R&D to release the next model of solar modules or inverter with better efficiency and optimized costs. Every tenth of a percent gained is a new success! However, it is a shame to encounter solar plants made up of the best components but never reaching the expected performance due to a simple sizing error.