Choosing the right solar module involves far more than comparing efficiency and power output. Ignacio Espinosa, Head of EU Technical Team at JA (formerly JA Solar), discusses how selection priorities are changing, why local conditions matter and the developments likely to influence solar projects over the coming years.
PES: Ignacio, welcome to PES Solar. Solar module technology has developed considerably in recent years, but choosing the right module isn’t simply about efficiency or power output anymore. How have you seen the priorities change?
Ignacio Espinosa: One of the biggest changes we’ve seen in recent years is how developers and engineering, procurement and construction (EPC) contractors assess module technology and its contribution to overall system performance. Historically, the focus was largely on power output and conversion efficiency. While these remain important, there’s now a greater understanding that module selection must also consider how the entire PV system will perform throughout its operational life.
This is influencing how manufacturers approach product development. Advances in cell architecture, module construction, sealing design and mechanical robustness are not simply about improving efficiency.
They also help reduce reliability risks, improve durability and maintain consistent energy generation over time. These characteristics become particularly important when considering the different environmental and operating conditions modules may encounter during 30 years of service.