Vila Franca de Xira, Portugal, situated at latitude 38.953 and longitude -8.9855, presents a moderately favorable location for solar PV energy generation throughout the year. This Northern Temperate Zone location experiences significant seasonal variations in solar energy production, which can impact the overall efficiency of solar installations.

Seasonal Solar Energy Production

The solar energy output at Vila Franca de Xira varies considerably across the four meteorological seasons. Summer stands out as the most productive period, with an impressive 8.19 kWh per day for each kilowatt of installed solar capacity. Spring follows as the second most productive season, generating 6.29 kWh/day/kW. Autumn sees a notable decrease in production, with 4.48 kWh/day/kW, while winter experiences the lowest output at 2.53 kWh/day/kW.

Optimal Times for Solar Generation

The most ideal times for solar energy generation in Vila Franca de Xira are during the summer months, typically from June to August, when daylight hours are longest and solar radiation is most intense. Spring and early autumn also offer good potential for solar energy production. However, energy output significantly decreases during late autumn and winter months due to shorter days and lower sun angles.

Panel Installation Considerations

For fixed panel installations in Vila Franca de Xira, the optimal tilt angle to maximize year-round solar production is 33 degrees facing South. This angle helps to balance energy capture across seasons, compensating for the sun's changing position throughout the year.

Environmental and Weather Factors

While Vila Franca de Xira generally offers favorable conditions for solar energy production, there are some factors that could potentially impact efficiency:

• Dust and pollution: Being close to industrial areas and major transportation routes, air pollution and dust accumulation on panels could reduce efficiency.
• Coastal effects: Proximity to the Atlantic Ocean may lead to salt spray, which can corrode solar equipment over time.

Preventative Measures

To mitigate these potential issues and ensure optimal energy production, several preventative measures can be taken during solar installation:

1. Regular cleaning schedules should be implemented to remove dust and pollutants from panel surfaces. 2. Using corrosion-resistant materials and protective coatings can help combat the effects of salt spray. 3. Installing monitoring systems can help quickly identify and address any drops in efficiency. 4. Considering the use of tracking systems, although more expensive, could significantly increase energy yield, especially during the less productive winter months.

By taking these factors into account and implementing appropriate measures, solar PV installations in Vila Franca de Xira can effectively harness the available solar resources throughout the year, despite seasonal variations and environmental challenges.

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 Vila Franca De Xira

Seasonal solar PV output for Latitude: 38.953, Longitude: -8.9855 (Vila Franca De Xira, 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 33° South in Vila Franca De Xira, Portugal

To maximize your solar PV system's energy output in Vila Franca De Xira, Portugal (Lat/Long 38.953, -8.9855) throughout the year, you should tilt your panels at an angle of 33° 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 Vila Franca De Xira, 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 Vila Franca De Xira, Portugal. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 33° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
23° South in Summer	43° South in Autumn	54° South in Winter	31° 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 Vila Franca De Xira, 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 Vila Franca De Xira, 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 Vila Franca De Xira, Portugal

Vila Franca de Xira, located in central Portugal, is situated in a diverse topographical region characterized by a mix of flat lowlands and gently rolling hills. The town itself lies along the banks of the Tagus River, which forms a wide estuary as it approaches the Atlantic Ocean. To the east of Vila Franca de Xira, the landscape gradually rises into a series of low hills and plateaus. These areas are part of the Ribatejo region, known for its agricultural lands and scattered cork oak forests. The terrain here is generally mild, with gentle slopes and occasional valleys carved by small streams and tributaries of the Tagus. West of the town, the topography is dominated by the vast alluvial plain of the Tagus River. This flat, low-lying area extends for several kilometers and is known as the Lezíria. It is characterized by fertile soils and is extensively used for agriculture, particularly rice cultivation.

Suitable Areas for Large-Scale Solar PV

When considering locations for large-scale solar photovoltaic (PV) installations near Vila Franca de Xira, several factors come into play. The most suitable areas would typically be those with abundant sunlight, relatively flat terrain, and minimal environmental or agricultural impact. The Lezíria plain to the west of Vila Franca de Xira presents a potential opportunity for solar PV development. Its flat topography would make construction and maintenance easier, and the open landscape ensures minimal shading. However, the agricultural importance of this area might pose challenges in terms of land use conflicts. The gently rolling hills to the east and northeast of Vila Franca de Xira could also be suitable for solar PV installations. These areas often have south-facing slopes that can maximize solar exposure throughout the day. Additionally, they may have less intensive agricultural use compared to the Lezíria, potentially making them more available for alternative land uses. It's worth noting that any large-scale solar PV project would need to carefully consider environmental impacts, particularly given the ecological importance of the Tagus Estuary and surrounding areas. Detailed site assessments and environmental studies would be necessary to identify the most appropriate locations that balance energy production potential with ecological and agricultural considerations.

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.