Haapsalu, Lääne, Estonia, situated at 58.9429°N, 23.5269°E, presents a challenging location for year-round solar energy generation. Located in the Northern Temperate Zone, this coastal town experiences significant seasonal variations in solar potential.

Seasonal Solar Performance

The solar energy output in Haapsalu fluctuates dramatically throughout the year. Summer months offer the most promising conditions, with an average daily output of 6.25 kWh per kW of installed solar capacity. Spring follows as the second-best season, yielding 4.09 kWh/day. However, autumn and winter see a sharp decline in production, with outputs of 1.69 kWh/day and a mere 0.57 kWh/day, respectively.

Optimal Installation

To maximize year-round solar energy production in Haapsalu, Lääne, fixed solar panels should be tilted at a 48-degree angle facing south. This optimal angle takes into account the location's latitude and seasonal sun positions to capture the most sunlight throughout the year.

Environmental and Weather Factors

Several factors can impede solar production in Haapsalu: 1. Long, dark winters with minimal daylight hours 2. Frequent cloud cover, especially during autumn and winter 3. Potential snow accumulation on panels during winter months

To mitigate these challenges, consider the following preventative measures: 1. Use high-efficiency solar panels designed for low-light conditions 2. Install snow-shedding systems or plan for regular panel cleaning 3. Implement a robust energy storage solution to balance seasonal variations

Conclusion

While Haapsalu's location is far from ideal for year-round solar energy production, it can still be viable with proper planning and technology. The focus should be on maximizing output during the more favorable spring and summer months, while implementing strategies to optimize performance during the challenging autumn and winter 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 20 locations across Estonia. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.

Link: Solar PV potential in Estonia by location

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

Seasonal solar PV output for Latitude: 58.9429, Longitude: 23.5269 (Haapsalu, Estonia), 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 48° South in Haapsalu, Estonia

To maximize your solar PV system's energy output in Haapsalu, Estonia (Lat/Long 58.9429, 23.5269) throughout the year, you should tilt your panels at an angle of 48° 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 Haapsalu, Estonia

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 Haapsalu, Estonia. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 48° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
42° South in Summer	60° South in Autumn	71° South in Winter	50° 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 Haapsalu, Estonia

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 Haapsalu, Estonia.

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 Haapsalu, Estonia

The topography around Haapsalu, Estonia, is characterized by a low-lying coastal landscape with gentle slopes and minimal elevation changes. Situated on the western coast of Estonia, Haapsalu is nestled within a shallow bay area of the Baltic Sea. The surrounding terrain is predominantly flat, with occasional small hills and undulations that rarely exceed 20 meters above sea level. The area is dotted with numerous small islands and islets, creating a picturesque archipelago off the coast. Inland, the landscape transitions into a mix of forests, meadows, and wetlands. Marshes and bogs are common features in the region, contributing to the area's rich biodiversity.

Potential for Large-Scale Solar PV

When considering areas nearby that would be most suited for large-scale solar photovoltaic (PV) installations, several factors come into play. The flat terrain surrounding Haapsalu offers advantages for solar development, as it minimizes shading issues and simplifies construction. The most suitable areas for solar PV would likely be found slightly inland from the coast, where there is less risk of sea spray and coastal weather effects that could impact solar panel efficiency. Open meadows and former agricultural lands that are not currently in use would be ideal candidates for solar farms. Areas to the south and east of Haapsalu might be particularly well-suited, as they would be less affected by coastal weather patterns and potentially receive more consistent sunlight. However, it's important to note that Estonia's northern latitude means that solar irradiance is generally lower compared to more southern regions, which could impact the overall efficiency of large-scale solar projects. Developers would need to carefully consider environmental factors, such as the presence of wetlands and protected habitats, when selecting sites for solar installations. Additionally, proximity to existing electrical infrastructure and the capacity of the local grid to accommodate large-scale solar input would be crucial factors in determining the most suitable locations for solar PV development in the Haapsalu area.

Estonia solar PV Stats as a country

Estonia ranks 58th in the world for cumulative solar PV capacity, with 414 total MW's of solar PV installed. Each year Estonia is generating 311 Watts from solar PV per capita (Estonia ranks 13th in the world for solar PV Watts generated per capita). [source]

Are there incentives for businesses to install solar in Estonia?

Yes, there are incentives for businesses wanting to install solar energy in Estonia. The Estonian government offers a range of financial support and tax incentives for businesses that invest in renewable energy sources such as solar power. These include grants, loans, and tax deductions. 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.

Do you have more up to date information than this on incentives towards solar PV projects in Estonia? Please reach out to us and help us keep this information current. Thanks!

Citation Guide

Article Details for Citation

Tell Us About Your Work

We love seeing how our research helps others! If you've cited this article in your work, we'd be delighted to hear about it. Drop us a line via our Contact Us page or on X, to share where you've used our information - we may feature a link to your work on our site. This helps create a network of valuable resources for others in the solar energy community and helps us understand how our research is contributing to the field. Plus, we occasionally highlight exceptional works that reference our research on our social media channels.

Feeling generous?

Share this with your friends!

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.