Siddamulla, Western Province, Sri Lanka, located at 6.8232° N, 79.9649° E, presents a favorable environment for solar energy production throughout the year. This tropical location benefits from consistent sunlight, with seasons primarily characterized by wet and dry periods rather than significant temperature variations.

Year-round Solar Energy Potential

The solar energy output in Siddamulla remains relatively stable across all seasons, with only minor fluctuations. Spring emerges as the most productive season, generating an average of 6.46 kWh per day for each kilowatt of installed solar capacity. Winter follows closely behind at 6.20 kWh/day, while summer yields 6.03 kWh/day. Autumn experiences a slight dip but still maintains a respectable output of 5.52 kWh/day.

Optimal Panel Positioning

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

Peak Production Periods

While solar energy generation remains consistent year-round, the spring months offer the highest potential for production. This period typically coincides with clearer skies and reduced cloud cover, allowing for maximum sunlight exposure and energy conversion.

Environmental Considerations

Despite the generally favorable conditions, there are some environmental factors that could potentially impact solar production in Siddamulla: 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 results in high humidity levels, which may slightly decrease panel efficiency and increase the risk of moisture-related issues. To mitigate these factors, several preventative measures can be implemented:

Preventative Measures

1. Use high-quality, weather-resistant solar panels designed for tropical climates. 2. Install adequate drainage systems to prevent water accumulation on panels during heavy rains. 3. Implement regular cleaning schedules to remove dust and debris, which can accumulate more quickly in humid environments. 4. Consider using micro-inverters or power optimizers to minimize the impact of partial shading from cloud cover. By taking these precautions, solar installations in Siddamulla can maximize energy production and maintain long-term efficiency despite the challenging tropical environment.

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 Siddamulla

Seasonal solar PV output for Latitude: 6.8232, Longitude: 79.9649 (Siddamulla, 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 Siddamulla, Sri Lanka

To maximize your solar PV system's energy output in Siddamulla, Sri Lanka (Lat/Long 6.8232, 79.9649) 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 Siddamulla, 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 Siddamulla, 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 Siddamulla, 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 Siddamulla, 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 Siddamulla, Sri Lanka

The area around Siddamulla, Sri Lanka, is characterized by diverse topography typical of the southwestern part of the island. Located in the Western Province, this region features a mix of low-lying coastal plains and gently rolling hills as you move inland.

Near the coast, where Siddamulla is situated, the terrain is predominantly flat or slightly undulating. This area is part of the coastal belt that extends along Sri Lanka's western shoreline. As you move eastward from Siddamulla, the landscape gradually becomes more elevated, with small hills and valleys creating a more varied topography.

The region is also marked by numerous waterways, including rivers, streams, and man-made canals. These water features have shaped the land over time, creating natural drainage systems and fertile floodplains. The Kelani River, one of Sri Lanka's major rivers, flows not far north of Siddamulla, influencing the local topography and ecosystem.

Regarding areas suitable for large-scale solar PV (photovoltaic) installations, the most promising locations would be found slightly inland from Siddamulla. The ideal sites for solar farms would have the following characteristics:

1. Open, relatively flat land with minimal shading from trees or hills
2. Areas that are not prone to flooding
3. Locations away from densely populated urban centers
4. Regions with good road access for construction and maintenance

Based on these criteria, the areas east and southeast of Siddamulla, where the terrain begins to rise into the hill country, could offer suitable locations for solar PV installations. These areas often have clearer skies and less urban development, which are favorable conditions for solar energy production.

However, it's important to note that any large-scale solar project would require detailed site surveys, environmental impact assessments, and consideration of local land use regulations. The tropical climate of Sri Lanka, with its mix of sunny and rainy seasons, would also need to be factored into the planning and design of any solar PV installation 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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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.