Best solar panels for Hot Climates in 2025: Comparison and Guide
It is obvious to think that solar panels perform well in a sunny and hot climate, as all this is related to sunlight. But the truth is that solar panels lose efficiency in high temperatures. Therefore, it becomes important to choose the best solar panels if you live in regions with long summers and high temperatures.
In this guide, we’ll explain how heat affects solar efficiency, what the temperature coefficient of power means, and compare the top-performing panels like Panasonic EverVolt, REC Alpha, and SunPower for hot weather conditions.
Let’s understand the basics first.
Why Solar Panels Perform Differently in Hot Climates
Our sun emits electromagnetic radiations that provide us with light and heat for sustaining various life forms on the Earth’s surface.
Visible light helps solar panels produce current, while solar cells are hindered by the heating effect that solar radiation produces.
The internal resistance of the solar cells increases when they get hot and they become sluggish and inefficient in producing current with every degree rise in the temperature.
In fact, solar panels perform well and produce more current at lower temperatures.
Therefore, people living in hotter regions need to look at something special in solar panels that can fight the heating effect of sunlight.
What is the Temperature Coefficient of Power in Solar Panels
Manufacturers are trying to minimize this effect by designing panels that have a lower temperature coefficient of power.
“The temperature coefficient of power is a metric that measures the reduction in power output with every degree rise in the cell temperature beyond 25°C
And
it is expressed in %/°C.”
Remember: The cell temperature mentioned above is different from the ambient air temperature.
When the air temperature is 25°C, the cells of the solar panel might be operating under 45°C to 50°C.
This science is similar to the case when you feel the car’s windowpanes are hotter than the surrounding air. In this post, I’ll help you in picking the best solar panels for hot climates.
Best Solar Panels for Hot Climates (2025 list)
The best solar panels are arranged on the basis of their power degradation rates.
The one whose power output degrades the least with every degree rise in the temperature is considered the best panel for a hot climate.
Here is the list:
| Manufacturer | Model | Power Coefficient (%/°C) | Country Origin |
|---|---|---|---|
| Panasonic | EverVolt | -0.26 | America |
| REC | Alpha Series | -0.26 | Norway |
| SunPower | SPR-X22 | -0.29 | America |
| LG | NeON | -0.30 | Korea |
| Vikram Solar | Somera Series 6 | -0.35 | India |
| Jinko Solar | Tiger Pro | -0.35 | China |
| Canadian Solar | HiKu | -0.35 | Canada |
| Q-cells | Q.PEAK DUO-G6+ | -0.36 | America |
| FuturaSun | M Next | -0.366 | Italy |
| Waaree | ARKA Series | -0.37 | India |
| Winaico | WST-M6 | -0.38 | Germany |
| Solaria Power | XT | -0.39 | America |
You can see that the Panasonic EverVolt and REC Alpha Series are on the top of the list with the Temperature Coefficient of Power of -0.26 %/°C.
Example: How to Calculate Solar Panel Power Loss in Hot Weather
It means that whenever the cell temperature goes beyond 25°C, it will start losing 0.26 % of its Pmax with every degree rise.
Let me make it more clear with the help of an example:
Assuming you’ve 380 watts of Panasonic EverVolt model installed on your rooftop
And
its solar cell is operating at 45 °C.
In that case, the power loss can be calculated as follows:
45°C – 25°C = 20°C (The cells are operating at 20°C higher)
The power loss would be:
Temperature coefficient of power x temperature difference
= – 0.26%/°C x 20°C
= – 5.2% (The solar panel will lose 5.16% of its Pmax)
That is in absolute terms, it would be:
-5.2% x 380 watts = 19.76 watts
It means that Panasonic EverVolt 380 watts solar panel will lose 19.76 watts when it is operating at 45°C.
It is not that one panel is inferior to the other but it all depends on the suitability and the climatic conditions.
In a mild climate, each panel is equally good.
Key Factors to Consider When Buying Solar Panels for Hot Regions
1) Look for a low value of the temperature coefficient of power
The Power Temperature Coefficient of – 0.4 %/°C is normal in most solar panels, which means that the panel will lose 4% with every 10°C rises in the temperature.
And
This loss can be as high as 25% – 30% at higher temperatures.
If you’re living in a hotter climate then you should look for panels having less power degradation rate.
2) Buy solar panels with high operating range
In hot regions, sunlight is good, but due to heat, the temperature within the solar panel can reach as high as 90°C, and it becomes difficult for the panel to operate unless it has a high operating range.
Therefore, you should look for panels having a high operating range.
3) Free from PID losses
The high temperature leads to Potential Induced Degradation (PID) losses in the solar panels, resulting in more leakage current that further deteriorates the power output.
Look for panels that are free of PID losses.
4) Sufficient gap between solar panels and your roof
The panels should be installed in a way that there is always a gap between the roof and the rear side of it. When wind passes through this gap, it cools down the solar panel.
5) Avoid dark colored objects
Avoid installing solar panels near dark-colored objects as the dark color objects absorb more heat, resulting in rising in the temperature of the surrounding.
When considering the above points while purchasing solar panels for hot climates,
I’m sure you’re going to get smooth electricity for decades and that is profitable too.
Conclusion: Best Solar Panels for Hot Climates in 2025
Choosing the best solar panels for hot climates is not about picking the highest-watt panel, but about selecting one that performs efficiently when cell temperatures rise. Panels with a low temperature coefficient of power (like Panasonic EverVolt and REC Alpha Series) will lose less energy in high-heat conditions, making them ideal for regions with long summers.
When buying panels for hot weather, always check:
- Temperature coefficient (lower is better)
- High operating temperature range
- PID-free design for long-term durability
- Proper installation with enough airflow to keep panels cool
In short, if you live in a hot climate region, focus on panels with minimum power degradation instead of just chasing power rating and efficiency numbers. This small step can save you thousands of rupees over the system’s lifetime.
👉 Still unsure which solar panel suits your home? Try my Solar Feasibility Spreadsheet to compare payback, ROI, and panel performance based on your location.
FAQ on Best Solar Panels for Hot Climates
1. Do solar panels work better in hot climates?
Not exactly. Solar panels need sunlight, not heat, to produce electricity. In fact, high temperatures reduce their efficiency. That’s why panels with a low temperature coefficient perform better in hot regions.
2. Which solar panels are best for hot weather?
Panels from Panasonic EverVolt, REC Alpha, and SunPower are among the best for hot climates because they have very low temperature coefficients (around -0.26%/°C). This means they lose less power when temperatures rise.
3. How much efficiency do solar panels lose in summer?
Most solar panels lose about 0.3%–0.4% efficiency per °C above 25°C. On a hot day when cell temperatures reach 45°C or above, this could mean a 5%–8% power loss. Choosing panels with a lower temperature coefficient helps reduce this loss.
