Solar PV Analysis of Ruwanwella, Sri Lanka
Ruwanwella, Sabaragamuwa Province, Sri Lanka is a good location for year-round solar energy production due to its tropical climate, which provides consistent sunlight throughout most of the year. The amount of electricity that can be produced from each kilowatt (kW) of installed solar panels varies slightly by season: it's highest in spring at 6.23 kilowatt-hours (kWh) per day, followed by summer at 5.89 kWh/day, winter at 5.71 kWh/day and autumn at 5.09 kWh/day.
This means that while there are slight fluctuations in solar output across different seasons, overall the location is favorable for generating solar energy throughout the year. However, spring and summer would be the best times for maximum solar production given their higher daily outputs.
For optimal results with a fixed panel installation here, it's recommended to tilt your panels towards an angle of 6 degrees South - this will maximize total yearly production from your photovoltaic (solar power) system.
As far as local factors that could potentially hinder solar production in Ruwanwella; heavy rainfall during monsoon seasons might reduce output temporarily due to cloud cover and less direct sunlight reaching the panels. Additionally dust or debris settling on panels may also affect efficiency if not cleaned regularly.
To mitigate these issues and ensure greater energy production:
1) You might consider installing an automatic cleaning system or schedule regular manual cleanings to keep your panels clear from dust or debris.
2) During periods of heavy rainfall or cloudy weather where possible reduction in output may occur; having a backup power source like a generator or battery storage system could help maintain consistent electricity supply.
3) Using high-quality durable panels can withstand extreme weather conditions ensuring longevity and performance over time.
4) Lastly monitoring system performance regularly can alert you early on any potential issues allowing for timely maintenance & repairs if necessary.
In conclusion; though there are minor environmental challenges they're not significant enough to deter from the overall benefits of installing solar panels in Ruwanwella, Sabaragamuwa Province, Sri Lanka. With proper installation and maintenance, this location is quite ideal for harnessing solar energy year-round.
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 Ruwanwella
Seasonal solar PV output for Latitude: 7.0447, Longitude: 80.2502 (Ruwanwella, 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 Ruwanwella, Sri Lanka
To maximize your solar PV system's energy output in Ruwanwella, Sri Lanka (Lat/Long 7.0447, 80.2502) 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 Ruwanwella, 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 Ruwanwella, 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 | 13° 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 Ruwanwella, 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 Ruwanwella, 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 Ruwanwella, Sri Lanka
Ruwanwella, Sri Lanka is located in a relatively flat area with mild hilly regions. The landscape is largely dominated by lush greenery, forests, and agricultural land. There are also several bodies of water nearby including the Kelani River.
The region experiences a tropical rainforest climate with high temperatures and humidity levels throughout the year. This means that there's a good amount of sunlight for most parts of the year which makes it suitable for solar PV installations.
For large-scale solar PV projects, areas with less tree cover would be more suitable to avoid shading issues. Also, flat or gently sloping lands would be preferable as they require less work in terms of site preparation and allow for easier installation and maintenance.
Areas near existing infrastructure like roads and power lines would also be beneficial as this can reduce costs related to transportation and connection to the grid.
However, it's important to note that while these general factors can indicate suitability for solar PV installations, specific site assessments including environmental impact studies are necessary before any project can proceed.
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!
Citation Guide
Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Saturday 29th of June 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.
