Bandaragama, Western Province, Sri Lanka, located at 6.7193° N, 79.9877° E, presents a favorable environment for solar energy generation throughout the year. This tropical location benefits from consistent sunlight, with seasonal variations primarily characterized by wet and dry periods rather than significant temperature fluctuations.

Solar Energy Potential

The solar energy output at Bandaragama demonstrates impressive consistency across all seasons. Spring emerges as the most productive period, with an average daily output of 6.46 kWh per kW of installed solar capacity. Winter follows closely behind at 6.20 kWh/day, while summer yields 6.03 kWh/day. Autumn, although slightly less productive, still maintains a respectable output of 5.52 kWh/day. This minimal seasonal variation is a significant advantage for solar energy production in Bandaragama. It ensures a steady and reliable power supply throughout the year, reducing the need for supplementary energy sources during less productive months.

Optimal Panel Installation

For fixed solar panel installations in Bandaragama, Western Province, the ideal tilt angle to maximize year-round energy production is 6 degrees South. This slight tilt helps optimize the panels' exposure to sunlight throughout the year, accounting for the location's proximity to the equator and the Earth's elliptical orbit.

Environmental Considerations

While Bandaragama's climate is generally conducive to solar energy production, there are a few environmental factors to consider: 1. Monsoon seasons: Sri Lanka experiences two monsoon seasons, which can lead to increased cloud cover and rainfall, potentially reducing solar output. 2. High humidity: The tropical climate brings high humidity levels, which may affect solar panel efficiency and longevity. To mitigate these factors, consider the following preventative measures:

• Install high-quality, weather-resistant solar panels designed for tropical climates
• Implement a regular cleaning and maintenance schedule to combat dust and humidity buildup
• Use anti-reflective coatings on panels to maximize light absorption during cloudy periods
• Consider a slight increase in panel capacity to compensate for potential production dips during monsoon seasons

By addressing these environmental factors, solar installations in Bandaragama can maintain high efficiency and longevity, capitalizing on the location's excellent year-round solar potential.

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 Bandaragama

Seasonal solar PV output for Latitude: 6.7193, Longitude: 79.9877 (Bandaragama, 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 Bandaragama, Sri Lanka

To maximize your solar PV system's energy output in Bandaragama, Sri Lanka (Lat/Long 6.7193, 79.9877) 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 Bandaragama, 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 Bandaragama, 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 Bandaragama, 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 Bandaragama, Sri Lanka.

Our calculation method

1. Solar Position:
   We determine the Sun's position on the Winter solstice using the location's latitude and solar declination.
2. Shadow Projection:
   We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle.
3. 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 Bandaragama, Sri Lanka

The area around Bandaragama, Sri Lanka, is characterized by a mix of gently rolling terrain and relatively flat lowlands. This region is part of the country's wet zone, which experiences significant rainfall throughout the year. The landscape is predominantly rural, with a patchwork of small towns, villages, and agricultural lands interspersed with patches of tropical vegetation.

To the west of Bandaragama, the terrain gradually slopes towards the coastal areas, becoming increasingly flat as it approaches the Indian Ocean. In contrast, moving eastward from Bandaragama, the land begins to rise slightly, with occasional small hills and elevated areas. However, there are no major mountains or steep slopes in the immediate vicinity.

The region is crisscrossed by numerous small rivers and streams, which contribute to the lush, green appearance of the landscape. These waterways have shaped the local topography over time, creating gentle valleys and flood plains in some areas.

When considering areas nearby that would be most suited for large-scale solar PV installations, several factors need to be taken into account. The ideal locations would be relatively flat, open areas with minimal shading from trees or buildings. They should also have good access to existing infrastructure, such as roads and power transmission lines.

Given these criteria, the most suitable areas for solar PV development near Bandaragama would likely be found in the flatter, more open agricultural lands to the west and southwest of the town. These areas typically have fewer trees and more expansive open spaces that could accommodate large solar arrays. Additionally, being closer to the coast, these regions may experience slightly less cloud cover compared to areas further inland, potentially increasing solar energy yield.

However, it's important to note that any large-scale solar development would need to carefully balance land use concerns, particularly given the importance of agriculture in the region. Environmental impact assessments and community consultations would be crucial steps in identifying the most appropriate sites for solar PV installations while minimizing disruption to local ecosystems and livelihoods.

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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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.