Tortona, Piedmont, Italy, located at 44.9026 latitude and 8.8601 longitude, presents a varying landscape for solar PV energy generation throughout the year. This northern Italian location experiences significant seasonal differences in solar energy production potential.

Seasonal Solar Production

Solar panels in Tortona produce their highest output during summer months, generating approximately 7.12kWh per day for each kilowatt of installed capacity. Spring follows as the second most productive season with 5.48kWh/day per kW. Production drops considerably in autumn to 3.27kWh/day and reaches its lowest point in winter with just 1.88kWh/day per kW installed.

This seasonal pattern creates a nearly fourfold difference between peak summer and minimum winter production, which is typical for locations in the Northern Temperate Zone. The substantial variation means that system sizing must account for these seasonal fluctuations, especially if consistent year-round power is required.

Optimal Panel Installation

For fixed panel installations in Tortona, Piedmont, the ideal tilt angle to maximize year-round solar energy production is 38 degrees facing South. This specific angle optimizes the annual solar harvest by balancing seasonal variations in the sun's position throughout the year.

Environmental and Weather Considerations

Several local factors may impact solar production in Tortona:

• Fog and winter haze: The Po Valley region, where Tortona is located, is notorious for dense fog episodes, particularly during autumn and winter months. These conditions can significantly reduce solar irradiance reaching panels.
• Snow accumulation: Winter snowfall can temporarily cover panels, blocking production until the snow melts or is removed.
• Agricultural dust: The surrounding agricultural areas may generate dust that can settle on panels, gradually reducing efficiency.

Preventative Measures

To mitigate these challenges, solar installations in Tortona should consider:

• Self-cleaning panels or regular maintenance schedules to address dust and debris accumulation
• Slightly steeper tilt angles (40-45 degrees) if winter production is particularly important, as this helps snow to slide off more easily
• Elevated mounting systems to reduce snow coverage duration
• Anti-reflective panel coatings that perform better in diffuse light conditions common during foggy periods
• Microinverters or power optimizers to minimize production losses when parts of an array are affected by shading or snow

With these considerations addressed, Tortona still represents a viable location for solar PV installations, particularly when systems are designed with seasonal variations in mind.

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 338 locations across Italy. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.

Link: Solar PV potential in Italy by location

Solar output per kW of installed solar PV by season in Tortona

Seasonal solar PV output for Latitude: 44.9026, Longitude: 8.8601 (Tortona, Italy), 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 38° South in Tortona, Italy

To maximize your solar PV system's energy output in Tortona, Italy (Lat/Long 44.9026, 8.8601) throughout the year, you should tilt your panels at an angle of 38° 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 Tortona, Italy

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 Tortona, Italy. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 38° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
29° South in Summer	48° South in Autumn	59° South in Winter	37° 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 Tortona, Italy

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 Tortona, Italy.

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 Tortona, Italy

Tortona is situated in the northwestern Italian region of Piedmont, specifically in the province of Alessandria. The city lies at the confluence of the Scrivia and Ossona rivers, positioned strategically at the foothills of the Ligurian Apennines. This geographical location creates a varied topographical landscape around the city. The immediate area surrounding Tortona is characterized by a transition from the Po Valley plains to the north and east, to more elevated terrain to the south and west. The city itself sits at an elevation of approximately 122 meters above sea level, but the surrounding landscape quickly changes as one moves in different directions.

Northern and Eastern Topography

To the north and east of Tortona extends the wide, flat expanse of the Po Valley (Pianura Padana), one of Italy's most significant geographical features. This area consists of fertile alluvial plains with minimal elevation changes, creating vast open spaces with excellent exposure to the sun throughout the day. The terrain here is predominantly flat agricultural land, with elevations generally ranging between 80-130 meters above sea level.

Southern and Western Topography

Moving south and west from Tortona, the landscape gradually rises toward the foothills of the Ligurian Apennines. These hills become progressively more pronounced as one travels further south, eventually developing into significant mountains. This transition zone features gently rolling hills, small valleys, and increasingly steep terrain. Elevations in these areas can range from 150 meters to over 500 meters within just a few kilometers of the city.

River Valleys

The Scrivia River valley creates a notable topographical feature, cutting through the landscape and forming a natural corridor. This river valley, along with several smaller stream valleys, creates breaks in the otherwise rising terrain to the south. These valleys often have flat bottoms with steeper sides, particularly as they approach the more mountainous regions.

Solar PV Potential Areas

For large-scale solar photovoltaic installations, the northern and eastern plains of the Po Valley present the most suitable topography. These areas offer several advantages: The flat terrain minimizes installation costs and complexity, as minimal land preparation is required. The open nature of the plains provides unobstructed solar exposure throughout the day, without shadowing from mountains or hills. The extensive agricultural lands in these areas could potentially accommodate dual-use approaches, combining farming with solar energy production. Secondary potential areas include the gentler south-facing slopes of the hills to the south and west of Tortona. While these areas would require more complex installation procedures due to the sloping terrain, they can offer excellent solar exposure, particularly those oriented toward the south. The elevated positions can sometimes benefit from reduced fog exposure compared to the lower plains. The river valleys, particularly the wider sections of the Scrivia valley, also offer potential locations for solar installations, though these areas must be carefully evaluated for flood risk and may have more limited available space. Areas less suitable for large-scale solar development include the steeper hillsides and mountains to the south, where installation would be technically challenging and potentially environmentally disruptive. Additionally, north-facing slopes throughout the region would receive significantly reduced solar radiation, making them poor candidates for solar PV development. The transitional zone between the plains and hills, where Tortona itself is situated, offers a compromise between the advantages of both topographical types, though available land may be more limited due to existing development.

Italy solar PV Stats as a country

Italy ranks 6th in the world for cumulative solar PV capacity, with 22,698 total MW's of solar PV installed. This means that 8.30% of Italy's total energy as a country comes from solar PV (that's 8th in the world). Each year Italy is generating 381 Watts from solar PV per capita (Italy ranks 7th in the world for solar PV Watts generated per capita). [source]

Are there incentives for businesses to install solar in Italy?

Yes, there are several incentives for businesses wanting to install solar energy in Italy. The Italian government offers a range of financial incentives and tax credits for businesses that install solar energy systems. These include the Conto Energia scheme, which provides feed-in tariffs for electricity generated from renewable sources; the Superbonus 110%, which allows businesses to deduct up to 110% of their investment in renewable energy systems from their taxes; and the Ecobonus 65%, which provides a 65% tax deduction on investments in renewable energy systems. Additionally, businesses may be eligible for grants or loans from regional governments or other organizations.

Do you have more up to date information than this on incentives towards solar PV projects in Italy? 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.