Do solar panels stop working if they get too hot?



Solar Panels: All You Need to Know About Heat Impact on Efficiency

Solar energy has taken the modern world by storm, with more and more people investing in solar panels for their homes, business, and even farms. However, there are many factors that need to be taken into account before investing in a solar panel system, one of the biggest being heat. High temperatures can have a major effect on the performance of a solar panel, influencing its efficiency and longevity. In this article we will take a look at just how heat affects solar panel efficiency, the different types of solar panels, regulations, and some tips for reducing heat impacts on solar panel efficiency.

A Brief Introduction to Solar Panels

Solar panels are a type of photovoltaic (PV) technology used to convert sunlight into electricity. Solar panels are composed of smaller solar cells, each with a thin layer of photovoltaic material that generates electricity when exposed to the sun’s rays. Solar energy is then collected and stored in a battery or can be used to power appliances directly.

Solar panel efficiency is dependent on a variety of factors, one of the most important being temperature. While cooler temperatures generally lead to improved solar panel performance, high temperatures can have a notable impact on efficiency.

How Heat Affects Solar Panel Efficiency

Solar panels are designed to work most efficiently at temperatures between 25°C and 45°C. Above 45°C solar panel performance begins to suffer, with CED Greentech estimating that efficiency decreases by 10-25%. According to, efficiency drops by 0.5 percentage points for every degree Celsius above 45°C.

Different Types of Solar Panels and Their Tolerance for Heat

The various types of solar panels all perform differently when exposed to heat. Monocrystalline solar panels are typically the most efficient and are able to withstand the highest temperatures without being significantly affected, due to their single-crystal construction. Polycrystalline solar panels are also quite efficient but have a slightly lower tolerance for heat than monocrystalline panels. SunPower’s Maxeon cell is designed to have 25% more power and 33% more efficiency at high temperatures, making it an especially good choice when selecting a solar panel for hot climates.

Solar Panel Efficiency During High Temperatures

High temperatures can have a significant effect on solar panel efficiency, with efficiency dropping off significantly as temperatures rise above 45°C. Furthermore, it’s important to note that other environmental factors such as air pollution, rain, and dust can also impact solar panel efficiency and performance.

Rules and Regulations Around Solar Panel Efficiency and Heat

The regulations around solar panel efficiency vary by region, but in the United States, the Federal Trade Commission (FTC) requires solar panel manufacturers to disclose the energy output of their products over time and in different weather conditions. According to the FTC’s Guides Concerning the Use of Endorsements and Testimonials in Advertising, solar panel manufacturers are required to provide “a graphical representation of the rated solar energy output . . . over time and under conditions in a variety of climates”. This ensures that consumers are able to make informed decisions about the best solar panel for their specific climate and location.

Tips to Reduce Heat Impact on Solar Panel Efficiency

One of the best ways to reduce heat impact on your solar panel system is through solar panel shading. By reducing the amount of direct sunlight hitting the panels, you can significantly reduce their temperature and protect them from heat-related damage. Other tips include installing your panels in a place with good air flow; investing in efficient, heat-resistant solar panels; and cleaning them on a regular basis to get rid of dust and debris.


Heat can have a major effect on the performance and efficiency of solar panels, with efficiency decreasing as temperatures rise above 45°C. Different types of solar panels have different levels of tolerance for heat, with monocrystalline and SunPower’s Maxeon cells being better at dealing with high temperatures than other panels. It is important to be aware of the rules and regulations governing the installation and maintenance of solar panel systems, as well as to employ tactics such as shading and regular cleaning to protect your solar panels from heat damage. Ultimately, the answer to the question ‘Do solar panels stop working if they get too hot?’ is, potentially, yes – but with some basic precautions and understanding, it is possible to keep your solar panel system running as efficiently as possible in high temperatures.

> Do solar panels stop working if they get too hot?

Yes, solar panels can stop working if they get too hot. High temperatures can decrease the efficiency of solar panels by 10-25%, and if temperatures rise too high the panels may not be able to generate enough electricity to be useful. Taking steps to protect the panels from the heat, such as using shading and keeping them in a place with good air flow, can help to minimize the impact of heat on solar panel efficiency.

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