Solar PV Analysis of Pias, Portugal
Pias, Porto, Portugal, situated at coordinates 41.2708, -8.2638, offers a moderately favorable location for solar PV energy generation throughout the year. Located in the Northern Temperate Zone, this area experiences distinct seasonal variations in solar output.
Seasonal Solar Production
The solar energy potential in Pias varies significantly across seasons. Summer proves to be the most productive period, with an average daily output of 7.43kWh per kW of installed solar capacity. Spring follows closely, generating 6.09kWh/day. Autumn sees a considerable decrease in production, averaging 3.97kWh/day, while winter experiences the lowest output at 2.19kWh/day.
The most ideal times for solar energy generation in Pias are from late spring through early autumn. During these months, longer daylight hours and higher sun angles contribute to increased solar panel efficiency.
Optimal Panel Installation
For fixed panel installations in Pias, Porto, the ideal tilt angle to maximize year-round solar production is 35 degrees facing South. This angle optimizes the panels' exposure to sunlight throughout the year, accounting for seasonal variations in the sun's position.
Environmental and Weather Considerations
While Pias generally offers good conditions for solar energy production, there are some factors that could potentially impact efficiency:
- Cloud cover: The region can experience cloudy days, particularly in autumn and winter, which may reduce solar output.
- Dust and pollen: Being in a rural area, airborne particles could accumulate on panels, slightly decreasing their efficiency.
To mitigate these factors, regular panel cleaning and maintenance should be implemented. Additionally, installing panels at the optimal angle and using high-quality, weather-resistant equipment can help maximize energy production despite these minor challenges.
Overall, while Pias may not offer ideal year-round conditions for solar PV generation, it still presents a viable location for solar energy production, especially during the spring and summer months.
Note: The Northern Temperate Zone extends from 35° latitude North up to 66.5° latitude.
So far, we have conducted calculations to evaluate the solar photovoltaic (PV) potential in 179 locations across Portugal. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.
Link: Solar PV potential in Portugal by location
Solar output per kW of installed solar PV by season in Pias
Seasonal solar PV output for Latitude: 41.2708, Longitude: -8.2638 (Pias, Portugal), based on our analysis of 8760 hourly intervals of solar and meteorological data (one whole year) retrieved for that set of coordinates/location from NASA POWER (The Prediction of Worldwide Energy Resources) API:
Ideally tilt fixed solar panels 35° South in Pias, Portugal
To maximize your solar PV system's energy output in Pias, Portugal (Lat/Long 41.2708, -8.2638) throughout the year, you should tilt your panels at an angle of 35° South for fixed panel installations.
As the Earth revolves around the Sun each year, the maximum angle of elevation of the Sun varies by +/- 23.45 degrees from its equinox elevation angle for a particular latitude. Finding the exact optimal angle to maximise solar PV production throughout the year can be challenging, but with careful consideration of historical solar energy and meteorological data for a certain location, it can be done precisely.
We use our own calculation, which incorporates NASA solar and meteorological data for the exact Lat/Long coordinates, to determine the ideal tilt angle of a solar panel that will yield maximum annual solar output. We calculate the optimal angle for each day of the year, taking into account its contribution to the yearly total PV potential at that specific location.
Seasonally adjusted solar panel tilt angles for Pias, Portugal
If you can adjust the tilt angle of your solar PV panels, please refer to the seasonal tilt angles below for optimal solar energy production in Pias, Portugal. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 35° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 25° South in Summer | 46° South in Autumn | 56° South in Winter | 34° South in Spring |
Our recommendations take into account more than just latitude and Earth's position in its elliptical orbit around the Sun. We also incorporate historical solar and meteorological data from NASA's Prediction of Worldwide Energy Resources (POWER) API to assign a weight to each ideal angle for each day based on its historical contribution to overall solar PV potential during a specific season.
This approach allows us to provide much more accurate recommendations than relying solely on latitude, as it considers unique weather conditions in different locations sharing the same latitude worldwide.
Calculate solar panel row spacing in Pias, Portugal
We've added a feature to calculate minimum solar panel row spacing by location. Enter your panel size and orientation below to get the minimum spacing in Pias, Portugal.
Our calculation method
- Solar Position:
We determine the Sun's position on the Winter solstice using the location's latitude and solar declination. - Shadow Projection:
We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle. - Minimum Spacing:
We add the shadow length to the horizontal space occupied by tilted panels.
This approach ensures maximum space efficiency while avoiding shading during critical times, as the Winter solstice represents the worst-case scenario for shadow length.
Topography for solar PV around Pias, Portugal
The area around Pias, Portugal, located at coordinates 41.2708°N and 8.2638°W, is characterized by a diverse and hilly topography typical of northern Portugal. This region is part of the Douro Valley, known for its picturesque landscapes and terraced vineyards.
The terrain in and around Pias features rolling hills and steep slopes, with elevations ranging from about 100 to 600 meters above sea level. The area is intersected by numerous small rivers and streams, which have carved out valleys over time. These valleys are often narrow and deep, creating a patchwork of ridges and depressions across the landscape.
The local topography is heavily influenced by the Douro River, which flows roughly east to west, not far from Pias. The river has shaped the surrounding land, creating a series of terraces and steep hillsides that are characteristic of the region. Many of these slopes have been cultivated for centuries, primarily for grape production, resulting in the distinctive terraced vineyards that the Douro Valley is famous for.
Areas Suitable for Large-Scale Solar PV
When considering areas nearby that would be most suited to large-scale solar photovoltaic (PV) installations, several factors need to be taken into account:
1. The ideal locations for solar PV would be relatively flat areas or gently sloping south-facing hillsides. These would receive the most direct sunlight throughout the day, maximizing energy production. Some of the plateaus or wider valley floors in the region could be suitable, provided they are not prime agricultural land or protected areas.
2. Areas to the south of Pias, moving away from the Douro River, tend to have more open, less steep terrain that could be more suitable for solar installations. These areas often have fewer vineyards and may offer larger continuous plots of land.
3. Abandoned or less productive agricultural land in the vicinity could be repurposed for solar farms. This would need to be balanced with local agricultural needs and traditions.
4. It's important to note that while the hilly terrain can present challenges for large-scale solar installations, it also offers opportunities for innovative designs that can maximize exposure to sunlight.
5. Any potential sites would need to be evaluated for their proximity to existing electrical infrastructure, as well as their environmental and cultural impact, given the region's significant viticultural heritage.
In conclusion, while the topography around Pias presents some challenges for large-scale solar PV due to its hilly nature, there are likely to be suitable areas in the wider region, particularly in less steep terrain to the south or on carefully selected hillsides that offer optimal sun exposure.
Portugal solar PV Stats as a country
Portugal ranks 32nd in the world for cumulative solar PV capacity, with 1,801 total MW's of solar PV installed. This means that 3.40% of Portugal's total energy as a country comes from solar PV (that's 23rd in the world). Each year Portugal is generating 174 Watts from solar PV per capita (Portugal ranks 29th in the world for solar PV Watts generated per capita). [source]
Are there incentives for businesses to install solar in Portugal?
Yes, there are several incentives for businesses wanting to install solar energy in Portugal. The Portuguese government offers a range of financial incentives and tax breaks for businesses that invest in renewable energy sources such as solar power. These include grants, loans, and tax credits. Additionally, the government has set up a feed-in tariff system which guarantees a fixed price for electricity generated from renewable sources such as solar power. This helps to make investing in solar energy more attractive to businesses.
Do you have more up to date information than this on incentives towards solar PV projects in Portugal? Please reach out to us and help us keep this information current. Thanks!
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Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Thursday 17th of October 2024
Last Updated: Monday 21st of July 2025
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Compare this location to others worldwide for solar PV potential
The solar PV analyses available on our website, including this one, are offered as a free service to the global community. Our aim is to provide education and aid informed decision-making regarding solar PV installations.
However, please note that these analyses are general guidance and may not meet specific project requirements. For in-depth, tailored forecasts and analysis crucial for feasibility studies or when pursuing maximum ROI from your solar projects, feel free to contact us; we offer comprehensive consulting services expressly for this purpose.
Helping you assess viability of solar PV for your site
Calculate Your Optimal Solar Panel Tilt Angle: A Comprehensive Guide
Enhance your solar panel's performance with our in-depth guide. Determine the best tilt angle using hard data, debunk common misunderstandings, and gain insight into how your specific location affects solar energy production.
