Rupea, Brașov County, Romania, situated at latitude 46.0299 and longitude 25.2194, presents a varied landscape for solar energy production throughout the year. This location in the Northern Temperate Zone experiences significant seasonal fluctuations in solar output, which impacts the overall efficiency of photovoltaic (PV) systems.

Seasonal Solar Performance

The solar energy potential in Rupea varies dramatically across seasons. Summer stands out as the most productive period, with an impressive 6.40 kWh per day for each kilowatt of installed solar capacity. Spring follows as the second-best season, generating 4.70 kWh/day. Autumn sees a considerable drop to 3.13 kWh/day, while winter experiences the lowest output at just 1.42 kWh/day.

These figures highlight the stark contrast between summer and winter production, with summer yielding more than four times the energy of winter months. This variation underscores the importance of efficient energy storage solutions to balance supply throughout the year.

Optimal Panel Installation

To maximize year-round solar energy production in Rupea, Brașov County, fixed solar panels should be tilted at an angle of 39 degrees facing South. This optimal angle takes into account the location's latitude and the Earth's elliptical orbit, ensuring the best possible exposure to sunlight across all seasons.

Environmental Considerations

While Rupea's location is generally favorable for solar energy production, there are some environmental factors to consider. The region experiences cold winters with occasional heavy snowfall, which can temporarily reduce solar panel efficiency. To mitigate this, panels should be installed at a steeper angle to promote snow sliding off, and regular maintenance should include snow removal when necessary.

Additionally, the area may experience occasional dust storms in the drier months, which can coat panels and reduce their effectiveness. Implementing a regular cleaning schedule and considering self-cleaning panel technologies can help maintain optimal performance.

Conclusion

Overall, Rupea offers a good location for solar PV installation, particularly during the spring and summer months. While winter production is significantly lower, the substantial output during peak seasons can offset this decline. With proper installation techniques and maintenance practices, solar energy can be a viable and sustainable power source for this Romanian locality.

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

Link: Solar PV potential in Romania by location

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

Seasonal solar PV output for Latitude: 46.0299, Longitude: 25.2194 (Rupea, Romania), 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 39° South in Rupea, Romania

To maximize your solar PV system's energy output in Rupea, Romania (Lat/Long 46.0299, 25.2194) throughout the year, you should tilt your panels at an angle of 39° 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 Rupea, Romania

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 Rupea, Romania. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 39° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
30° South in Summer	50° South in Autumn	60° South in Winter	38° 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 Rupea, Romania

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 Rupea, Romania.

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 Rupea, Romania

The topography around Rupea, Romania, is characterized by a diverse landscape that combines rolling hills, plateaus, and valleys. Situated in the Transylvanian Plateau region, Rupea is surrounded by gently undulating terrain that gradually rises towards the Carpathian Mountains to the east. The area features a mix of open grasslands, agricultural fields, and patches of forest, creating a picturesque rural setting. To the north and west of Rupea, the land is generally flatter, with wide open spaces and occasional low hills. This area is part of the Transylvanian Basin, known for its fertile soil and agricultural productivity. As you move eastward, the terrain becomes more varied, with steeper hills and deeper valleys cutting through the landscape. Small streams and rivers wind their way through these valleys, contributing to the region's natural beauty and agricultural potential.

Potential Areas for Large-Scale Solar PV

When considering locations for large-scale solar photovoltaic (PV) installations near Rupea, several factors come into play. The most suitable areas would typically be those with relatively flat or gently sloping terrain, good sun exposure, and minimal shading from natural or man-made obstacles. The areas to the north and west of Rupea, where the landscape is flatter and more open, would likely be the most suitable for large-scale solar PV projects. These regions offer expansive spaces with fewer topographical challenges, making it easier to install and maintain solar panels. The open nature of the terrain also means there are fewer obstructions that could cast shadows on the panels, maximizing their exposure to sunlight throughout the day. Additionally, some of the gentler slopes on the hills surrounding Rupea could potentially be utilized for solar installations. South-facing slopes, in particular, would be advantageous as they receive more direct sunlight throughout the year. However, careful planning would be necessary to ensure that the angle of the slope doesn't negatively impact the efficiency of the solar panels or complicate their installation and maintenance. It's important to note that while topography is a crucial factor in determining suitable locations for solar PV, other considerations such as proximity to power infrastructure, land ownership, and environmental impact would also need to be taken into account when planning large-scale solar projects in the region.

Romania solar PV Stats as a country

Romania ranks 39th in the world for cumulative solar PV capacity, with 1,398 total MW's of solar PV installed. This means that 3.40% of Romania's total energy as a country comes from solar PV (that's 24th in the world). Each year Romania is generating 74 Watts from solar PV per capita (Romania ranks 43rd in the world for solar PV Watts generated per capita). [source]

Are there incentives for businesses to install solar in Romania?

Yes, there are incentives for businesses wanting to install solar energy in Romania. The Romanian government offers a number of financial incentives and subsidies for businesses that invest in renewable energy sources such as solar power. These include grants, tax deductions, and other forms of support. Additionally, the government has set up a Renewable Energy Support Scheme (RES) which provides additional funding for projects related to renewable energy sources such as solar power.

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

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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.