What is the average performance of solar panels?
Solar panels are usually classified according to their efficiency and power, with approximate values per square meter:
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Low efficiency: between 150 and 250 W/m² (14 % – 17 % efficiency).
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Average output: between 250 and 350 W/m², with an efficiency of around 18% – 19%.
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High efficiency: up to 400 W/m², reaching an efficiency of 23%. Naturgy
Although high-performance panels feature superior materials and technologies, their higher cost leads many installations to opt for medium-performance panels, which offer about 20% efficiency at a more competitive price.
How is the actual yield calculated?
It is determined by dividing the energy actually generated by the incident solar energy, multiplying the result by 100 to obtain a percentage.
And if we talk in figures?
Imagine a panel with a rated power of 400 W:
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In winter, with about 6-7 hours of effective sunshine, you could get about 2.4 – 2.8 kWh per day.
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In summer, with about 10 hours of solar radiation, the figure could rise to 4 kWh per day.
Is a solar installation worthwhile?
Absolutely. Here are some key figures:
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The useful life of the panels is estimated to be 25 years or more.
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A typical installation saves up to 70% on electricity bills.
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Profitability can be between 5% and 15% per year, depending on consumption and location.
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The annual savings can be approximately 600 €, with an estimated payback in about 7 years.
In a nutshell
| Appearance | Details |
|---|---|
| Typical efficiency | 18 % – 19 % (medium efficiency), up to 23 % (high efficiency) |
| Estimated power/m² | 250 – 350 W (medium), up to 400 W (high) |
| Useful life | 25 years or more |
| Potential savings | Up to 70 % on electricity bills |
| Annual return | Between 5 % and 15 %. |
| Estimated amortization | Approximately 7 years |
Alusín Solar for residential installations
To support solar panels in residential installations, we have designed the Lagos Series. It is characterized by being a type of structure adapted to market requirements and designed for the needs of the installer, highlighting the ease and convenience of assembly.
