Solar PV Analysis of Kiribathgoda, Sri Lanka
Kiribathgoda, Western Province, Sri Lanka, located at 6.7956°N, 79.889°E, offers a promising environment for solar PV energy generation throughout the year. This tropical location benefits from consistent sunlight, with seasons primarily characterized by wet and dry periods rather than traditional temperature-based seasons.
Seasonal Solar Performance
Solar energy production in Kiribathgoda remains relatively stable across all seasons, with only minor fluctuations. Spring yields the highest output at 6.46 kWh/day per kW installed, followed closely by winter at 6.20 kWh/day. Summer produces 6.03 kWh/day, while autumn sees a slight dip to 5.52 kWh/day. These figures indicate that Kiribathgoda is well-suited for year-round solar energy generation, with particularly favorable conditions during spring and winter months.
Optimal Panel Placement
For fixed panel installations in Kiribathgoda, Western Province, the ideal tilt angle to maximize year-round solar production is 6 degrees facing South. This relatively low angle is due to the location's proximity to the equator, allowing panels to capture sunlight efficiently throughout the year without significant seasonal adjustments.
Environmental Considerations
While Kiribathgoda's tropical climate is generally favorable for solar energy production, there are some environmental factors to consider:
- Monsoon seasons: Sri Lanka experiences two monsoon seasons, which can lead to increased cloud cover and rainfall, potentially reducing solar output.
- High humidity: The tropical climate's high humidity levels may lead to accelerated wear on solar equipment if not properly maintained.
Preventative Measures
To mitigate these environmental challenges and ensure optimal solar energy production, consider implementing the following measures:
- Use high-quality, weather-resistant solar panels and components designed for tropical climates
- Install adequate drainage systems to prevent water accumulation on panels during heavy rains
- Implement regular cleaning and maintenance schedules to combat dust and humidity-related issues
- Consider microinverter or power optimizer systems to minimize the impact of partial shading during cloudy periods
By addressing these factors, solar installations in Kiribathgoda can take full advantage of the location's excellent year-round solar potential, making it an ideal site for sustainable energy production.
Note: The Tropics are located between 23.5° North and -23.5° South of the equator.
So far, we have conducted calculations to evaluate the solar photovoltaic (PV) potential in 109 locations across Sri Lanka. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.
Link: Solar PV potential in Sri Lanka by location
Solar output per kW of installed solar PV by season in Kiribathgoda
Seasonal solar PV output for Latitude: 6.7956, Longitude: 79.889 (Kiribathgoda, Sri Lanka), 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 6° South in Kiribathgoda, Sri Lanka
To maximize your solar PV system's energy output in Kiribathgoda, Sri Lanka (Lat/Long 6.7956, 79.889) throughout the year, you should tilt your panels at an angle of 6° 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 Kiribathgoda, Sri Lanka
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 Kiribathgoda, Sri Lanka. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 6° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 9° North in Summer | 12° South in Autumn | 22° South in Winter | 1° 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 Kiribathgoda, Sri Lanka
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 Kiribathgoda, Sri Lanka.
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 Kiribathgoda, Sri Lanka
Kiribathgoda is a town located in the western part of Sri Lanka, situated in a relatively flat coastal plain. The area around Kiribathgoda is characterized by low-lying terrain with gentle slopes and occasional small hills. The elevation in this region generally ranges from near sea level to about 30-50 meters above sea level.
The landscape is primarily composed of urban and suburban developments, interspersed with patches of vegetation, including rice paddies, small plantations, and scattered trees. As you move slightly eastward from Kiribathgoda, the terrain gradually becomes more undulating, with small hills and valleys becoming more prominent.
To the west of Kiribathgoda, the land remains mostly flat as it approaches the coast of the Indian Ocean. This area is characterized by a network of rivers and canals, including the Kelani River, which flows nearby. The presence of these water bodies contributes to the overall flatness of the terrain in this direction.
Regarding areas suitable for large-scale solar PV installations, the regions to the east and northeast of Kiribathgoda hold the most promise. These areas, while still relatively close to the town, tend to have more open spaces and less dense urban development. The gently rolling terrain in these directions provides opportunities for solar farms without significant topographical obstacles.
Specifically, the areas around Gampaha and Mirigama, located northeast of Kiribathgoda, could be potential candidates for solar PV projects. These regions have a mix of agricultural land and less densely populated areas, which could potentially be repurposed for solar energy generation. The slightly higher elevation in these areas may also provide better exposure to sunlight throughout the day.
It's important to note that while the topography around Kiribathgoda is generally favorable for solar PV installations, other factors such as land availability, proximity to power grids, and local regulations would also need to be considered when planning large-scale solar projects in this region.
Sri Lanka solar PV Stats as a country
Sri Lanka ranks 55th in the world for cumulative solar PV capacity, with 434 total MW's of solar PV installed. Each year Sri Lanka is generating 20 Watts from solar PV per capita (Sri Lanka ranks 66th in the world for solar PV Watts generated per capita). [source]
Are there incentives for businesses to install solar in Sri Lanka?
Yes, there are incentives for businesses wanting to install solar energy in Sri Lanka. The government of Sri Lanka has implemented a number of policies and programs to promote the use of renewable energy sources such as solar power. These include tax exemptions, subsidies, and other financial incentives for businesses that install solar systems. Additionally, the government has set up a Renewable Energy Fund which provides grants to support research and development activities related to renewable energy technologies.
Do you have more up to date information than this on incentives towards solar PV projects in Sri Lanka? Please reach out to us and help us keep this information current. Thanks!
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Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Saturday 20th of July 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.
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.
