How Solar Works — and Why Temperature Matters
Solar PV panels capture energy from sunlight (not heat) and convert it into electricity through a process called the photovoltaic effect. However, temperature can slightly influence efficiency — panels perform best on bright, cool days when their internal temperature stays near 25 °C.
| Condition | Effect on Output |
|---|---|
| Cooler weather (15–25 °C) | Slight increase in efficiency |
| Hot weather (35 °C+) | Small drop — typically 5–15% |
| Cloudy days | Reduced sunlight, but panels still generate power from diffuse light |
Panels have a temperature co-efficient (usually around –0.4 % per °C). That means for every degree above 25 °C, output drops by roughly 0.4 %. In Ireland’s mild climate, that’s not an issue as your panels rarely overheat and often perform better than in hotter countries.
The Science Behind It
-
Solar panels convert light (photons) into current, not heat. Warming a panel doesn’t increase the sunlight hitting it — it affects how well the panel can turn that light into electricity.
-
As a panel’s internal temperature rises, atoms vibrate more vigorously. That extra vibration makes it harder for electrons (energized by photons) to escape and generate usable current.
-
Conversely, when panels are cooler (but still well-lit), electrons face less “resistance” from atomic vibrations, improving conversion efficiency.
Environmental and Economic Advantages
- Free, Renewable Energy:
Solar energy is supplied by nature, it’s free, abundant, and available across Ireland. Once installed, your panels produce power directly from sunlight without fuel or emissions. - Low Maintenance & High Reliability:
PV systems have no moving parts, meaning fewer breakdowns than wind or hydro systems. Maintenance is minimal, occasional cleaning and inspections are usually enough. - Sustainable and Future-Proof:
Solar PV plays a major role in Ireland’s renewable energy future, supporting national carbon-reduction goals while lowering household and business energy costs. - Government Grants & Incentives:
The Irish Government, through SEAI and other programs, offers generous grants for residential, commercial, and agricultural installations. This makes solar energy a smart, supported investment, not just an eco-friendly choice.
Before
After
Why Choose North Cork Electrical
- Local experts, serving Cork and Munster with over 20 years’ electrical experience
- Certified SEAI solar installers
- Premium solar panels and hybrid inverters for maximum efficiency
- Fully insured and regulated for your peace of mind
- End-to-end service – from consultation to aftercare
Start Your Solar Journey Today!
The sun’s not going anywhere — but your high energy bills can.
Talk to North Cork Electrical today and discover how easy it is to switch!