Solar Panels: Can exposure to overnight dew in winter reduce their lifespan?

As winter approaches, you might be considering installing solar panels—but perhaps you are worried that dew settling on them could damage the panels or shorten their lifespan.

With the arrival of November, the weather has begun to turn chilly, and it is set to get even colder throughout December. Many people consider installing solar panels during this time to help manage electricity bills—allowing them to run appliances like geysers and heaters without a sharp increase in costs. A common concern, however, is whether the dew that forms during winter nights could negatively affect the longevity of the panels.

While it is perfectly normal for dew to form overnight during the winter, will this exposure damage your solar panels? The answer is no. Solar panels are specifically engineered to withstand a wide range of weather conditions. So, if you have solar panels installed on your roof, there is no need to worry that overnight exposure to dew will damage them or reduce their operational lifespan.

What impact does dew have on solar panels?

During winter nights, the formation of dew on solar panels can actually help wash away light dust from their surface. As the sun rises in the morning, the water droplets roll off, effectively cleaning the surface of the panels.

However, it is worth noting that this process may vary depending on your location. In areas with high levels of dust or dirt, the dew can mix with these particles to form a layer on the panels. When the sun comes out, this mixture may dry and stick to the surface. This prevents sunlight from reaching the solar cells effectively, which can hinder electricity generation.

When do solar panels get damaged?

A high-quality solar panel can last up to 25 years. It is not the case that dew forming on the panels during winter will necessarily shorten their lifespan. However, if the panel quality is poor or the edge sealing is inadequate, moisture can seep inside, potentially causing the internal components to rust.

Keep these points in mind

To ensure your solar panels function optimally, you can clean them in the morning using a soft cotton cloth if dust has accumulated along with dew. In short, keeping the panels clean will help them last for a long time.