Kelso, Scotland, a town in the Scottish Borders region of the United Kingdom, presents a challenging location for year-round solar PV energy generation. Situated at 55.5829° N latitude and -2.4077° E longitude, this Northern Temperate Zone location experiences significant seasonal variations in solar energy production.
Seasonal Solar Output
The solar energy output in Kelso fluctuates dramatically throughout the year. Summer months are the most productive, with an average daily output of 5.07 kWh per kW of installed solar capacity. Spring follows as the second-best season, yielding 4.06 kWh/day. However, autumn and winter see a sharp decline in production, with 1.72 kWh/day and a mere 0.78 kWh/day, respectively.
Optimal Times for Solar Generation
The ideal period for solar energy production in Kelso spans from late spring through early autumn. During these months, longer daylight hours and higher sun angles contribute to increased solar panel efficiency. However, the substantial drop in output during autumn and winter presents a significant challenge for year-round reliance on solar power in this location.
Panel Installation Considerations
To maximize year-round solar production in Kelso, Scotland, fixed solar panels should be installed at a tilt angle of 47 degrees facing south. This angle optimizes the panels' exposure to sunlight throughout the year, accounting for the location's latitude and the Earth's elliptical orbit.
Environmental and Weather Factors
Several factors can impede solar production in Kelso:
- Cloud cover: The region experiences frequent overcast conditions, particularly in autumn and winter, reducing solar irradiance.
- Rainfall: Kelso's climate includes substantial rainfall, which can affect panel efficiency.
- Short winter days: The extreme reduction in daylight hours during winter significantly impacts solar energy generation.
Preventative Measures
To mitigate these challenges, consider implementing the following measures:
- Use high-efficiency solar panels designed for low-light conditions
- Install a solar tracking system to maximize sun exposure
- Regularly clean panels to remove dirt and debris
- Incorporate energy storage solutions to balance seasonal variations
While Kelso's location presents challenges for year-round solar energy production, careful planning and appropriate technology can help maximize the potential of solar PV systems in this area.
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 911 locations across United Kingdom. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.
Link: Solar PV potential in United Kingdom by location
Solar output per kW of installed solar PV by season in Kelso
Seasonal solar PV output for Latitude: 55.5829, Longitude: -2.4077 (Kelso, United Kingdom), 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 47° South in Kelso, United Kingdom
To maximize your solar PV system's energy output in Kelso, United Kingdom (Lat/Long 55.5829, -2.4077) throughout the year, you should tilt your panels at an angle of 47° 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 Kelso, United Kingdom
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 Kelso, United Kingdom. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 47° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 39° South in Summer | 58° South in Autumn | 69° South in Winter | 48° 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 Kelso, United Kingdom
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 Kelso, United Kingdom.
Our calculation method
- Solar Position:
We determine the Sun's position on the Winter solstice using the location's latitude and solar declination. - Shadow Projection:
We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle. - 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 Kelso, United Kingdom
The topography around Kelso, a town in the Scottish Borders region of the United Kingdom, is characterized by gently rolling hills and fertile lowlands. Situated in the Tweed Valley, Kelso is surrounded by picturesque countryside typical of the Scottish Borders landscape. The River Tweed, a major watercourse in southern Scotland, flows through the area, carving out a wide valley and creating a relatively flat floodplain near the town. To the north and west of Kelso, the land gradually rises into the Lammermuir Hills, while to the south, the Cheviot Hills form a natural border between Scotland and England. These upland areas feature a mix of rounded hills, steep-sided valleys, and open moorland. The immediate vicinity of Kelso, however, is predominantly composed of undulating farmland and wooded areas, with elevations generally ranging from 30 to 150 meters above sea level.
Potential for Large-Scale Solar PV
When considering areas nearby that would be most suited to large-scale solar PV installations, several factors come into play. The gently sloping farmland to the south and east of Kelso offers promising potential for solar energy development. These areas benefit from relatively flat terrain, which simplifies construction and minimizes shading issues. Additionally, the agricultural nature of the land means there are large, open spaces that could potentially be repurposed for solar farms without significant impact on natural habitats. However, it's important to note that the Scottish Borders region, including Kelso, experiences lower levels of solar irradiance compared to more southerly parts of the UK. This factor may somewhat reduce the overall efficiency of solar PV installations in the area. Despite this, advancements in solar technology have made it increasingly viable to generate solar power in regions with moderate sunlight. The areas around the villages of Stichill, Hume, and Eccles, located to the east and southeast of Kelso, might be particularly suitable for large-scale solar PV. These locations offer a good balance of open land, gentle slopes, and proximity to existing infrastructure. Additionally, the slightly higher elevations in these areas may provide better exposure to sunlight throughout the day. It's crucial to consider that any large-scale solar PV development would need to be carefully planned to balance energy generation goals with the preservation of the region's scenic beauty and agricultural heritage. Environmental impact assessments and community consultations would be essential steps in identifying the most appropriate sites for such projects in the Kelso area.United Kingdom solar PV Stats as a country
United Kingdom ranks 14th in the world for cumulative solar PV capacity, with 13,689 total MW's of solar PV installed. This means that 4.00% of United Kingdom's total energy as a country comes from solar PV (that's 20th in the world). Each year United Kingdom is generating 203 Watts from solar PV per capita (United Kingdom ranks 25th in the world for solar PV Watts generated per capita). [source]
Are there incentives for businesses to install solar in United Kingdom?
Yes, there are several incentives for businesses wanting to install solar energy in the United Kingdom. The UK government offers a Feed-in Tariff (FiT) scheme which pays businesses for every unit of electricity they generate from their solar panels. Additionally, businesses may be eligible for tax reliefs such as Enhanced Capital Allowances and Renewable Heat Incentives. Finally, some local authorities offer grants or other financial support to help businesses with the cost of installing solar energy systems.
Do you have more up to date information than this on incentives towards solar PV projects in United Kingdom? Please reach out to us and help us keep this information current. Thanks!
Citation Guide
Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Friday 21st of February 2025
Last Updated: Monday 21st of July 2025
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Compare this location to others worldwide for solar PV potential
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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.




