Solar PV Analysis of Belmonte, Portugal
Belmonte, Castelo Branco, Portugal, situated at latitude 40.3554 and longitude -7.3445, offers a varied solar energy potential throughout the year. This location in the Northern Temperate Zone experiences significant seasonal fluctuations in solar power generation.
Seasonal Solar Output
Summer stands out as the prime season for solar energy production in Belmonte, Castelo Branco, with an impressive daily output of 8.03 kWh per kW of installed solar capacity. Spring follows as the second-best season, generating 5.94 kWh/day. Autumn sees a considerable drop to 4.06 kWh/day, while winter experiences the lowest output at 2.30 kWh/day.
These figures indicate that Belmonte is most suitable for solar PV generation from late spring through early autumn. During this period, longer days and higher sun angles contribute to increased energy production. However, the significant decrease in winter output suggests that supplementary energy sources may be necessary during the colder months.
Optimal Panel Placement
To maximize year-round solar energy production in Belmonte, Castelo Branco, fixed solar panels should be installed at a tilt angle of 34 degrees facing south. This angle optimizes the panels' exposure to sunlight throughout the year, balancing the varying sun positions across seasons.
Environmental Considerations
While Belmonte's location is generally favorable for solar energy production, there are some environmental factors to consider:
- Fog and mist: Being in a mountainous region, Belmonte may experience occasional fog or mist, particularly in the mornings. This can temporarily reduce solar panel efficiency.
- Dust and pollen: The rural setting may lead to dust and pollen accumulation on panels, potentially affecting their performance.
To mitigate these issues, regular cleaning of the solar panels is recommended. Additionally, installing panels at a slightly steeper angle than the optimal 34 degrees can help with natural cleaning during rainfall, reducing maintenance needs.
In conclusion, while Belmonte's solar potential varies significantly across seasons, proper panel placement and maintenance can ensure efficient year-round energy production, with summer and spring being particularly productive periods.
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 Belmonte
Seasonal solar PV output for Latitude: 40.3554, Longitude: -7.3445 (Belmonte, 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 34° South in Belmonte, Portugal
To maximize your solar PV system's energy output in Belmonte, Portugal (Lat/Long 40.3554, -7.3445) throughout the year, you should tilt your panels at an angle of 34° 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 Belmonte, 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 Belmonte, Portugal. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 34° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 24° South in Summer | 45° South in Autumn | 55° South in Winter | 33° 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 Belmonte, 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 Belmonte, 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 Belmonte, Portugal
The area around Belmonte, Portugal, is characterized by a diverse and picturesque topography typical of the country's central region. Belmonte is situated in the Cova da Beira subregion, which is part of the larger Beira Interior region. The landscape here is a mix of rolling hills, valleys, and small mountains, creating a varied and visually appealing terrain.
To the west of Belmonte, you'll find the impressive Serra da Estrela mountain range, which is the highest in mainland Portugal. These mountains dominate the skyline and contribute to the area's rugged beauty. The eastern slopes of Serra da Estrela gradually give way to gentler hills and plateaus as you approach Belmonte.
The town itself is situated on a hill, offering panoramic views of the surrounding countryside. The Zêzere River, an important waterway in the region, flows nearby, carving valleys and creating fertile areas along its banks. The landscape is dotted with small villages, agricultural fields, and patches of forest, creating a mosaic of human activity and natural features.
When considering areas nearby that would be most suited to large-scale solar PV (photovoltaic) installations, several factors come into play. The ideal locations would be relatively flat or gently sloping areas with good sun exposure throughout the day. Based on the topography of the region, the following areas might be suitable:
1. The plateaus and gentler slopes to the east and southeast of Belmonte would likely be good candidates. These areas tend to have more open, less mountainous terrain that could accommodate large solar arrays.
2. The broader valleys between the hills, particularly those with a southern exposure, could also be suitable. These areas often have the advantage of being close to existing infrastructure and power lines.
3. Some of the higher elevation areas on the eastern side of Serra da Estrela, while more challenging to access, might offer excellent solar exposure and less competition for land use.
4. The agricultural plains that stretch eastward towards the Spanish border could potentially host solar installations, although this would need to be balanced with agricultural needs.
It's important to note that while topography is a crucial factor, other considerations such as land ownership, proximity to the power grid, environmental impact, and local regulations would also play significant roles in determining the most suitable locations for large-scale solar PV projects in the region.
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: Sunday 6th 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.
