My Roof Gets Hot, Will My Panels Work Better?

By October 23, 2020January 7th, 2021No Comments

Well, in short no.

Panel temperature has a negative effect on all solar panels and effects the overall efficiency (the output of the panel). So, whilst it sounds counter intuitive, the hotter the panel the less power they will generate.

All solar panels have performance data contained in the data sheet which should be provided with your proposal or quote.

The term used is “temperature coefficient” and explains how the panel will decrease in performance and is measured in % per Celsius (°C). New generation split systems have a coefficient of between -35% and a low Nominal Module Operating Temperature which for good panels is circa 42±2°C.

So, what does this mean in layman’s terms?

Buy good quality panels with a higher nominal operating temperature. The small increase in cost is well worth it in the longer run.