Solar PV Analysis of Williamstown, Ireland
Williamstown, Connacht, Ireland, situated at latitude 53.6826 and longitude -8.589, presents a mixed picture for solar PV energy generation throughout the year. This location in the Northern Temperate Zone experiences significant seasonal variations in solar output, which impacts the overall efficiency of solar installations.
Seasonal Solar Performance
The solar energy production in Williamstown varies dramatically across the seasons. Summer stands out as the most productive period, with an impressive 4.95 kWh per day for each kilowatt of installed solar capacity. Spring follows closely behind, generating 4.35 kWh/day. However, the output drops significantly during autumn to 1.92 kWh/day, and plummets to a mere 0.96 kWh/day in winter.
This stark contrast between seasons means that solar energy production is highly concentrated in the warmer months. The long summer days and higher sun angles contribute to the excellent performance during this time. Spring also offers good potential, likely due to clearer skies and increasing daylight hours.
Optimal Panel Configuration
To maximize year-round solar production in Williamstown, Connacht, fixed solar panels should be tilted at a 45-degree angle facing south. This configuration helps to capture the most sunlight possible throughout the year, balancing the low winter sun with the higher summer sun position.
Environmental Considerations
While Williamstown's location is generally favorable for solar energy, there are some environmental factors to consider:
- Cloud cover: Ireland is known for its cloudy climate, which can reduce solar efficiency.
- Rainfall: Frequent rain can affect panel performance and may require more frequent cleaning.
To mitigate these issues, installing high-quality, weather-resistant panels is crucial. Regular maintenance, including cleaning, can help maintain optimal performance. Additionally, considering a slight increase in the number of panels installed can help compensate for lower production during cloudy periods.
Conclusion
While Williamstown's location presents challenges for year-round solar energy production, particularly in winter, it still offers significant potential during spring and summer. With proper planning, optimal panel positioning, and appropriate maintenance, solar PV can be a viable renewable energy option for this Irish town.
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 104 locations across Ireland. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.
Link: Solar PV potential in Ireland by location
Solar output per kW of installed solar PV by season in Williamstown
Seasonal solar PV output for Latitude: 53.6826, Longitude: -8.589 (Williamstown, Ireland), 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 45° South in Williamstown, Ireland
To maximize your solar PV system's energy output in Williamstown, Ireland (Lat/Long 53.6826, -8.589) throughout the year, you should tilt your panels at an angle of 45° 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 Williamstown, Ireland
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 Williamstown, Ireland. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 45° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 37° South in Summer | 57° South in Autumn | 67° South in Winter | 45° 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 Williamstown, Ireland
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 Williamstown, Ireland.
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 Williamstown, Ireland
The area around Williamstown, Ireland, located at latitude 53.6826 and longitude -8.589, is characterized by a gently rolling landscape typical of the Irish Midlands. This region is part of County Galway and sits in the eastern part of the county, close to the border with County Roscommon.
The topography of this area is primarily composed of low-lying plains and subtle hills. The land is generally flat to moderately undulating, with occasional small hills and ridges breaking up the landscape. The elevation in this region typically ranges from about 50 to 100 meters above sea level, with some higher points reaching up to 150 meters in the surrounding areas.
The countryside around Williamstown is predominantly rural, featuring a patchwork of agricultural fields, pastures, and scattered woodlands. Small streams and rivers crisscross the landscape, contributing to the area's gentle contours. Bogs and wetlands are also common features in this part of Ireland, adding to the diversity of the terrain.
Areas Suitable for Large-Scale Solar PV
When considering locations for large-scale solar photovoltaic (PV) installations near Williamstown, several factors come into play. The most suitable areas would likely be:
1. Open farmland: The expansive agricultural fields in the region provide ample space for solar arrays. These areas are generally flat, which is ideal for solar panel installation, and have minimal shading from trees or buildings.
2. Gently sloping south-facing hillsides: While not as common in this relatively flat area, any south-facing slopes would be particularly well-suited for solar PV as they naturally maximize exposure to sunlight throughout the day.
3. Former boglands: Cutaway bogs that are no longer used for peat extraction could be repurposed for solar farms. These areas are typically flat and open, making them potentially suitable for large-scale installations.
4. Brownfield sites: Any former industrial or commercial sites in the broader region could be good candidates for solar development, as they often have the necessary infrastructure and are already zoned for development.
It's important to note that while the topography around Williamstown is generally favorable for solar PV, other factors such as grid connection availability, local planning regulations, and environmental considerations would also need to be taken into account when identifying specific sites for large-scale solar projects.
Ireland solar PV Stats as a country
Ireland ranks 83rd in the world for cumulative solar PV capacity, with 136 total MW's of solar PV installed. Each year Ireland is generating 27 Watts from solar PV per capita (Ireland ranks 61st in the world for solar PV Watts generated per capita). [source]
Are there incentives for businesses to install solar in Ireland?
Yes, there are a number of incentives available for businesses wanting to install solar energy in Ireland. The Sustainable Energy Authority of Ireland (SEAI) offers grants and other financial support for businesses that wish to install solar PV systems. Additionally, the government has introduced a Feed-in Tariff scheme which pays businesses for any excess electricity they generate from their solar panels. Finally, businesses may be eligible for tax relief on the cost of installing a solar system through the Accelerated Capital Allowance Scheme.
Do you have more up to date information than this on incentives towards solar PV projects in Ireland? 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: Saturday 3rd of August 2024
Last Updated: Monday 21st of July 2025
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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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