Solar PV Analysis of Hambantota, Sri Lanka
Hambantota, Southern Province, Sri Lanka is a great location for generating solar energy all year round because it gets consistent sunlight throughout the year. The amount of electricity produced per kilowatt of installed solar panels varies slightly with the seasons: 6.17kWh/day in summer, 5.60kWh/day in autumn, 5.42kWh/day in winter and 6.15kWh/day in spring.
This means that you can expect to generate more electricity from solar panels during summer and spring compared to autumn and winter due to longer daylight hours and higher sun intensity. However, even during winter, the production is still quite good because this location is near the equator where sunlight remains relatively constant throughout the year.
To get maximum benefit from your solar panels at this location, they should be fixed at an angle that faces 5 degrees South as this will allow them to capture most of the sunlight over the course of a day.
However, there may be some environmental or local factors that could affect how much energy you can produce with your solar panels here:
1) Rainy season: Hambantota experiences heavy rainfall especially during monsoon seasons which could reduce sunlight availability thereby affecting power generation capacity of your solar panel system.
Preventative measure: Ensure proper maintenance of your panel system including regular cleaning after heavy rains to remove any debris or dust particles on them which could block sunlight absorption.
2) High humidity levels: High humidity levels can cause condensation on panels reducing their efficiency.
Preventative measure: Consider using anti-reflective coating on your panels to minimize moisture accumulation.
3) Dust and dirt: Dusty conditions common in dry seasons might cover up your panels thereby reducing their efficiency.
Preventative measure: Regular cleaning will help maintain optimal performance by keeping dust off surfaces allowing maximum exposure to available light.
Overall though these potential issues are manageable through regular maintenance ensuring optimal performance for most part of the year.
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 Hambantota
Seasonal solar PV output for Latitude: 6.1201, Longitude: 81.1189 (Hambantota, 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 5° South in Hambantota, Sri Lanka
To maximize your solar PV system's energy output in Hambantota, Sri Lanka (Lat/Long 6.1201, 81.1189) throughout the year, you should tilt your panels at an angle of 5° 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 Hambantota, 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 Hambantota, Sri Lanka. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 5° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 10° North in Summer | 12° South in Autumn | 21° South in Winter | 0° 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 Hambantota, 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 Hambantota, 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 Hambantota, Sri Lanka
Hambantota is located on the southeastern coast of Sri Lanka. The topography in this region is mostly flat and low-lying, with some small hills and plateaus scattered throughout the area. The coastal areas are characterized by sandy beaches, while inland areas include grasslands, scrub forests, and wetlands.
The climate in Hambantota is tropical monsoon, with a dry season from May to September and a rainy season from October to April. It receives an average annual sunshine duration of about 2500 hours.
Given these characteristics, there are several factors that would make certain areas around Hambantota suitable for large-scale solar PV installations:
1) Flat Areas: Large-scale solar PV requires vast tracts of relatively flat land. Given that much of the land around Hambantota is flat or gently sloping, there should be numerous suitable locations for such installations.
2) Proximity to Infrastructure: Ideally, large-scale solar PV sites should be close to existing infrastructure (e.g., roads for access during construction and maintenance; power lines for transmitting electricity). Therefore places near main roads or existing power lines would be most suited.
3) Low Cloud Cover: Sites with low cloud cover will receive more sunlight and thus produce more electricity. As Hambantota has a high average annual sunshine duration it seems well-suited overall but specific local variations in cloud cover could affect site suitability.
4) Environmental Impact: Any potential site must also consider environmental impact assessments as building on wetlands or other ecologically sensitive areas can have negative impacts on biodiversity.
In conclusion multiple factors need consideration when choosing a location for large scale Solar PV but given its general geography and climatic conditions many parts surrounding Hambantota could potentially serve as suitable locations provided they meet all necessary criteria.
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: Thursday 11th 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.
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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.
