The best solar panels with low temperature coefficients — meaning they lose less efficiency as temperature rises — are typically those using advanced cell technologies like N-type monocrystalline (IBC, HJT, TOPCon) and certain premium models from top manufacturers. Panels with the lowest temperature coefficients maintain better performance in hot conditions, which is crucial for real-world efficiency.
Key Solar Panel Types with Low Temperature Coefficients
- Heterojunction (HJT) N-type Cells: These have some of the best temperature coefficients around -0.25% to -0.27% per °C, meaning minimal power loss with heat.
- IBC (Interdigitated Back Contact) N-type Cells: Slightly higher temperature coefficients around -0.26% to -0.30% per °C but still better than older technologies.
- TOPCon N-type Cells: Typically between -0.29% to -0.32% per °C.
- Traditional Monocrystalline P-type Cells: Usually about -0.35% to -0.40% per °C.
- Polycrystalline P-type Cells: Higher loss rates around -0.39% to -0.43% per °C.
Lower (less negative) temperature coefficients mean panels lose less power as temperatures rise and therefore perform better in hot climates.
Best Solar Panels with Low Temperature Coefficients in 2025
| Brand/Model | Efficiency | Temperature Coefficient (%/°C) | Notes |
|---|---|---|---|
| REC Alpha Pure RX | 21.6–22.6% | -0.24% | Best overall temperature coefficient available, high durability, 25-year warranty. |
| Panasonic Evervolt HK2 | 21.7–22.2% | -0.24% | Excellent for hot climates, strong temperature performance, 25-year warranty. |
| Maxeon 7 | 23.5–24.1% | -0.27% | Among highest efficiencies, excellent temperature coefficient for monocrystalline panels. |
| Canadian Solar TOPHiKu6 | 21.8–23% | -0.29% | High power output and solid temperature coefficient, 25-year warranty. |
| Jinko Solar Tiger Neo | 21.52–22.52% | -0.29% | Competitive efficiency, reliable performance in heat. |
| Qcells Q.Tron BLK M-G2+ | 21.3–22.5% | -0.30% | Widely installed, good temperature performance. |
Why N-type Solar Panels Are Preferred for Low Temperature Coefficients
N-type solar panels (including HJT, IBC, and TOPCon technologies) inherently have lower temperature coefficients than traditional P-type panels because their semiconductor doping reduces recombination losses and improves performance stability at elevated temperatures. They also offer:
- Higher efficiency rates
- Reduced degradation over time
- Better performance in cold and hot weather.
Additional Considerations
- The real-world operating temperature of panels often exceeds 25°C (standard test condition), sometimes reaching 60-85°C on hot rooftops, emphasizing the importance of low temperature coefficients.
- Roofing material and color can influence panel temperature and thus effective power output; lighter, reflective roofs reduce panel temperature.
- Temperature coefficients for thin-film panels can be even lower (~-0.2%/°C) but these generally have lower overall efficiency compared to crystalline silicon panels.
Summary:
If you want the best solar panels with low temperature coefficients (best performance in hot climates), look at panels using N-type technologies such as HJT or IBC cells. The REC Alpha Pure RX and Panasonic Evervolt offer the best temperature coefficients at around -0.24%/°C. Maxeon’s high-efficiency panels have slightly higher but still very low coefficients (-0.27%). Canadian Solar and Jinko also offer strong performers with coefficients near -0.29%. These panels balance high efficiency, longevity, and minimal power loss in heat, ideal for maximizing solar energy production in warm environments.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/what-are-the-best-solar-panels-with-low-temperature-coefficients/
