Marawila, North Western Province, Sri Lanka, situated at 7.4091° N, 79.8081° E, presents a favorable location for solar PV energy generation throughout the year. This tropical locale benefits from consistent sunlight, with its seasons primarily characterized by wet and dry periods rather than traditional temperature-based seasons.

Year-round Solar Potential

The solar energy output in Marawila remains relatively stable across all meteorological seasons. Spring sees the highest production at 6.55 kWh per day for each kW of installed solar capacity, closely followed by summer at 6.31 kWh/day. Winter maintains a strong output of 6.24 kWh/day, while autumn experiences a slight dip to 5.65 kWh/day. This consistency in solar production throughout the year is a significant advantage for Marawila. It ensures a reliable energy source and reduces the need for extensive energy storage systems that might be necessary in locations with more pronounced seasonal variations.

Optimal Panel Positioning

For fixed solar panel installations in Marawila, North Western Province, the ideal tilt angle to maximize year-round energy production is 7 degrees facing South. This relatively shallow angle reflects the location's proximity to the equator, where the sun's path remains high in the sky throughout the year.

Environmental Considerations

While Marawila's tropical climate is generally conducive to solar energy production, there are some environmental factors to consider: 1. Monsoon seasons: Sri Lanka experiences two monsoon seasons, which can bring heavy rainfall and increased cloud cover. This may temporarily reduce solar output during these periods. 2. High humidity: The tropical climate results in high humidity levels, which can potentially impact solar panel efficiency and longevity if not properly addressed. To mitigate these factors, several preventative measures can be taken during solar installation:

• Use high-quality, weather-resistant solar panels designed for tropical climates
• Implement robust mounting systems to withstand potential strong winds during monsoon seasons
• Install adequate drainage systems to prevent water accumulation on panels
• Regularly clean panels to remove dust and salt deposits that may accumulate in the humid environment

By implementing these measures, solar installations in Marawila can maintain high efficiency and durability, 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 Marawila

Seasonal solar PV output for Latitude: 7.4091, Longitude: 79.8081 (Marawila, 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 7° South in Marawila, Sri Lanka

To maximize your solar PV system's energy output in Marawila, Sri Lanka (Lat/Long 7.4091, 79.8081) throughout the year, you should tilt your panels at an angle of 7° 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 Marawila, 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 Marawila, Sri Lanka. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 7° 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	23° 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 Marawila, 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 Marawila, 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 Marawila, Sri Lanka

Marawila, located on the western coast of Sri Lanka, is characterized by a relatively flat topography typical of coastal regions. The area around Marawila consists primarily of low-lying plains with gentle undulations. The landscape is dominated by sandy beaches along the coastline, gradually transitioning into a mix of coconut plantations, paddy fields, and scattered patches of tropical vegetation as you move inland. The terrain in this region is generally below 10 meters above sea level, with only slight variations in elevation. This flat topography extends for several kilometers inland before gradually rising towards the interior of the country. The area is interspersed with numerous lagoons, estuaries, and small rivers that drain into the Indian Ocean, creating a diverse coastal ecosystem.

Potential for Large-scale Solar PV

When considering areas nearby Marawila for large-scale solar PV installations, several factors come into play. The most suitable locations would be slightly inland from the coast, where there is less risk of salt spray damage to the solar panels and reduced exposure to coastal weather events. The flat terrain found 5-10 kilometers east of Marawila presents ideal conditions for solar farms. These areas often feature cleared agricultural land or coconut plantations that could potentially be repurposed for solar energy production. The lack of significant elevation changes in this region would minimize shading issues and simplify the installation process. Areas around the towns of Nattandiya and Madampe, located approximately 10-15 kilometers southeast of Marawila, offer promising potential for solar PV development. These locations benefit from the same flat topography while being sufficiently inland to avoid coastal concerns. Additionally, their proximity to existing infrastructure and power grids could facilitate easier integration of solar-generated electricity into the local energy system. It's important to note that while the topography is favorable, other factors such as land ownership, environmental considerations, and grid connectivity would need to be thoroughly assessed before implementing any large-scale solar projects in the 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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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.