Solar Energy Potential in Mangualde, Viseu, Portugal

Mangualde, Viseu, Portugal, situated at coordinates 40.602, -7.7688 in the Northern Temperate Zone, offers promising conditions for solar photovoltaic (PV) energy generation, though with notable seasonal variations. This location experiences significant differences in solar energy production throughout the year, making it important to understand its annual cycle. The solar energy potential in Mangualde follows a clear seasonal pattern. Summer stands out as the most productive period, with an impressive 8.02 kWh per day for each kilowatt of installed capacity. Spring follows as the second most productive season, generating 5.90 kWh per day. Autumn yields a moderate 4.00 kWh daily, while winter shows the lowest production at just 2.24 kWh per day. For those considering solar installation in Mangualde, Viseu, it's worth noting that the optimal fixed panel tilt angle for maximizing year-round energy production is 35 degrees facing South. This specific angle has been carefully calculated to capture the maximum possible solar radiation throughout the year at this particular latitude.

Seasonal Considerations

The substantial difference between summer and winter production—with summer yielding nearly four times more energy than winter—indicates that Mangualde is an excellent location for summer-focused energy needs. This makes the location particularly suitable for applications where higher summer energy consumption aligns with peak production, such as cooling systems or tourist facilities that operate primarily during warmer months. Spring and autumn serve as transition periods, with spring offering considerably better generation potential than autumn. This creates an extended "high production season" from spring through summer, covering approximately half the year with above-average energy production.

Potential Challenges and Mitigation

While Mangualde enjoys favorable solar conditions overall, several environmental factors could affect solar production. The region can experience occasional dust storms from the Sahara Desert, which may deposit a fine layer of dust on panels, reducing their efficiency. Regular cleaning schedules, particularly after such weather events, can help maintain optimal performance. Winter in this region can bring occasional snowfall, which would temporarily reduce production. Installing panels at the recommended 35-degree tilt not only optimizes year-round production but also helps snow slide off more easily than a flatter installation would. The mountainous terrain of central Portugal may create localized shading issues depending on the specific installation site. A thorough site assessment to identify potential shading from nearby mountains, hills, or tall structures is essential before installation. In some cases, micro-inverters or power optimizers can help minimize the impact of partial shading on overall system performance. By accounting for these factors and implementing appropriate mitigation strategies, solar PV systems in Mangualde can effectively capitalize on the region's substantial solar resources, particularly during the highly productive 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 Mangualde

Seasonal solar PV output for Latitude: 40.602, Longitude: -7.7688 (Mangualde, 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 Mangualde, Portugal

To maximize your solar PV system's energy output in Mangualde, Portugal (Lat/Long 40.602, -7.7688) 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 Mangualde, 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 Mangualde, 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	45° South in Autumn	56° 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 Mangualde, 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 Mangualde, Portugal.

Our calculation method

1. Solar Position:
   We determine the Sun's position on the Winter solstice using the location's latitude and solar declination.
2. Shadow Projection:
   We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle.
3. 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 Mangualde, Portugal

The region surrounding Mangualde in central Portugal presents a diverse topographic landscape characterized by rolling hills, plateaus, and river valleys. Situated in the Viseu District within the Beira Alta province, Mangualde rests at an elevation of approximately 500 meters above sea level. The area forms part of the western Iberian Meseta, a vast plateau system that defines much of the interior of Portugal and Spain.

Regional Topography

The terrain around Mangualde features gentle to moderate slopes with occasional steeper hillsides. To the east rise the foothills of the Serra da Estrela mountain range, Portugal's highest mountain system, which creates a dramatic backdrop to the region. These mountains, reaching heights over 1,900 meters at their peak (though at some distance from Mangualde itself), influence the local climate and topography. The Dão River and its tributaries have carved scenic valleys throughout the region, creating natural corridors between the higher elevation areas. These river systems have historically shaped settlement patterns and agricultural development in the area. The landscape alternates between open plateaus and more enclosed valley systems, offering varied topographic conditions.

Soil and Surface Characteristics

The geological foundation of the region consists primarily of granite and schist, which have weathered over millions of years to form the current landscape. The soils tend to be thin and somewhat acidic on the higher elevations, while the valley floors contain more fertile alluvial deposits. Much of the natural vegetation has been modified through centuries of human activity, with pine and eucalyptus forests covering many hillsides, interspersed with traditional oak woodlands in some areas.

Solar PV Suitability

For large-scale solar photovoltaic installations, several areas near Mangualde offer promising conditions. The most suitable locations would include: The elevated plateaus to the south and southeast of Mangualde present some of the best opportunities for solar development. These areas combine favorable topography (relatively flat or gently sloping terrain) with good solar exposure due to their elevation and generally southern aspect. The plateaus between Mangualde and Nelas, for instance, offer extensive areas of consistent gradient with minimal shadowing effects. The broader plains extending westward toward Viseu also present considerable potential. These areas feature more gradual relief and fewer topographic barriers, allowing for larger contiguous installations. The land in this direction tends to have fewer steep slopes that would complicate construction or reduce efficiency. Areas of abandoned or less productive agricultural land throughout the region could be repurposed for solar development. These locations often already have some access infrastructure and minimal natural vegetation that would need to be cleared.

Topographic Limitations

Not all areas around Mangualde are equally suitable for large-scale solar development. The steeper hillsides and narrow valleys, particularly those with northern aspects, would present challenges for solar installation due to shadowing effects and construction difficulties. The eastern approaches to the Serra da Estrela, while receiving abundant sunlight, feature increasingly complex terrain that would make large installations more challenging and potentially more environmentally disruptive. The river valleys, while accessible, often represent more fertile agricultural land and may have greater ecological value, making them less appropriate for industrial-scale solar development from an environmental and land-use perspective.

Infrastructure Considerations

The topography has influenced the development of transportation and electrical infrastructure in the region. Mangualde sits near the A25 highway and has railway connections, providing potential access routes for construction and maintenance of solar facilities. The moderate relief of much of the surrounding area has allowed for the development of a reasonable road network that could support solar development, though some of the more suitable plateau areas may require additional access infrastructure. The existing electrical grid follows the major settlement corridors, with transmission lines generally following the more accessible topographic routes through the landscape. This infrastructure pattern may influence optimal siting for large solar installations, as proximity to existing transmission capacity significantly impacts project feasibility.

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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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.