Kishorganj, Dhaka Division, Bangladesh presents a moderately favorable location for year-round solar photovoltaic energy generation, though with notable seasonal variations that potential solar installers should carefully consider.

Seasonal Solar Performance

The solar energy output at this Northern Sub Tropical location varies significantly throughout the year. Spring emerges as the peak season, delivering an impressive 5.78kWh per day for each kilowatt of installed solar capacity. Autumn follows as the second-best performing season at 4.81kWh/day per kW, while summer provides 4.39kWh/day per kW. Winter presents the lowest output at 3.92kWh/day per kW, representing a substantial 32% decrease compared to spring production. For optimal year-round energy generation at this location, solar panels should be installed at a fixed tilt angle of 23 degrees facing south. This angle maximizes total annual production by accounting for the sun's varying position throughout the seasons and the Earth's elliptical orbit around the sun.

Environmental and Weather Challenges

Several significant local factors at Kishorganj can impede solar energy production and require careful consideration during installation planning. The region's monsoon climate presents the most substantial challenge to solar performance. Heavy monsoon rains, typically occurring from June through September, can dramatically reduce solar irradiance through persistent cloud cover. Additionally, the high humidity levels common in Bangladesh can lead to moisture-related issues with solar equipment and create conditions for accelerated corrosion of metal components. Dust and particulate matter represent another major concern, particularly during dry periods. Agricultural activities in the surrounding areas can generate significant dust that settles on solar panels, reducing their efficiency. The combination of dust accumulation and subsequent monsoon rains can create stubborn residues that further impair performance.

Preventative Measures for Enhanced Production

Several strategic measures can help maximize solar energy production despite these environmental challenges:

• Install panels with anti-reflective coatings and self-cleaning glass surfaces to minimize dust accumulation and facilitate easier cleaning
• Implement regular cleaning schedules, particularly before and after monsoon seasons, using appropriate cleaning techniques that won't damage panel surfaces
• Use corrosion-resistant mounting systems made from marine-grade aluminum or galvanized steel with protective coatings suitable for high-humidity environments
• Ensure proper drainage around solar installations to prevent water pooling and reduce humidity-related issues
• Install monitoring systems that can detect performance drops due to soiling or weather-related factors, enabling prompt maintenance responses

Proper ventilation beneath panels is crucial in this humid climate, as it helps prevent overheating and moisture buildup that can reduce efficiency and accelerate component degradation. Additionally, selecting solar panels and inverters with higher ingress protection ratings will ensure better resistance to moisture and dust infiltration. Despite these challenges, Kishorganj's location offers reasonable solar potential, particularly during spring and autumn months, making it a viable option for solar energy generation when proper installation and maintenance practices are implemented.

Note: The Northern Sub Tropics extend from 23.5° latitude North up to 35° latitude.

So far, we have conducted calculations to evaluate the solar photovoltaic (PV) potential in 88 locations across Bangladesh. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.

Link: Solar PV potential in Bangladesh by location

Solar output per kW of installed solar PV by season in Kishorganj

Seasonal solar PV output for Latitude: 24.3408, Longitude: 90.7606 (Kishorganj, Bangladesh), 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 23° South in Kishorganj, Bangladesh

To maximize your solar PV system's energy output in Kishorganj, Bangladesh (Lat/Long 24.3408, 90.7606) throughout the year, you should tilt your panels at an angle of 23° 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 Kishorganj, Bangladesh

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 Kishorganj, Bangladesh. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 23° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
8° South in Summer	30° South in Autumn	40° South in Winter	18° 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 Kishorganj, Bangladesh

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 Kishorganj, Bangladesh.

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 Kishorganj, Bangladesh

Topographical Overview of Kishorganj

Kishorganj district sits within the greater Sylhet division of northeastern Bangladesh, characterized by predominantly flat to gently undulating terrain typical of the Bengal Delta region. The landscape consists of fertile alluvial plains formed by centuries of river deposits, creating a relatively uniform elevation profile across most of the district. The area lies within the floodplains of several major river systems, including the Brahmaputra and its tributaries, which have shaped the local topography through seasonal flooding and sediment deposition.

The terrain around Kishorganj features subtle variations in elevation, with most areas ranging from approximately 8 to 25 meters above sea level. Small ridges and slightly elevated areas, known locally as "chars," are interspersed throughout the region, often representing former river channels or natural levees. These elevated areas typically remain above flood level during the annual monsoon season, making them particularly valuable for both agriculture and potential infrastructure development.

Water Bodies and Drainage Patterns

The region contains an extensive network of rivers, canals, and seasonal water bodies that significantly influence land use patterns. Major rivers including the Narasunda, Dhanu, and Fuleshwari flow through or near Kishorganj, creating natural boundaries and affecting the suitability of different areas for large-scale development. Numerous smaller channels, known as "khals," crisscross the landscape, providing drainage during the wet season but often drying up during winter months.

Seasonal flooding affects significant portions of the district during monsoon periods, typically from June through September. This natural flood cycle deposits fertile silt across the plains but also creates constraints for permanent infrastructure placement. Areas that experience regular inundation would require elevated installations or flood-resistant designs for any major solar development projects.

Soil Composition and Land Stability

The soil composition throughout Kishorganj consists primarily of alluvial deposits, creating generally stable foundation conditions for construction projects. The predominant soil types include clay loam and sandy loam, which provide adequate bearing capacity for solar panel mounting systems and associated infrastructure. However, the high clay content in some areas can lead to expansion and contraction during wet and dry seasons, requiring proper engineering considerations for foundation design.

Areas with better drainage characteristics typically feature more stable soil conditions throughout the year. These locations, often found on slightly elevated terrain or areas with good natural drainage, would be preferable for installations requiring consistent ground conditions and minimal seasonal movement.

Most Suitable Areas for Large-Scale Solar Development

The optimal locations for large-scale solar photovoltaic installations around Kishorganj would be the elevated areas and natural ridges that remain above typical flood levels. These zones, particularly those located 3-5 kilometers south and southwest of Kishorganj town, offer relatively stable ground conditions and reduced flood risk while maintaining good accessibility via existing road networks.

Areas along the western edges of the district, where the terrain gradually rises toward the Madhupur tract, present excellent opportunities for solar development. These locations benefit from well-drained soils, minimal flood exposure, and sufficient elevation to avoid seasonal water accumulation. The land use in these areas typically consists of agricultural fields that could potentially be converted or integrated with solar installations through agrivoltaic approaches.

The northeastern portions of Kishorganj, particularly areas between the major river channels, also show promise for solar development. These inter-fluvial zones often feature stable, slightly elevated terrain with good drainage characteristics. The relatively flat topography in these areas would minimize grading requirements and reduce installation costs while providing adequate space for large-scale solar arrays.

Areas immediately adjacent to existing transportation infrastructure, particularly along the Dhaka-Sylhet highway corridor, offer additional advantages for solar development due to improved accessibility for construction and maintenance activities. These locations typically feature better drainage and more stable ground conditions due to road construction and associated infrastructure development.

Bangladesh solar PV Stats as a country

Bangladesh ranks 63rd in the world for cumulative solar PV capacity, with 329 total MW's of solar PV installed. Each year Bangladesh is generating 2 Watts from solar PV per capita (Bangladesh ranks 87th in the world for solar PV Watts generated per capita). [source]

Are there incentives for businesses to install solar in Bangladesh?

Yes, there are incentives for businesses wanting to install solar energy in Bangladesh. The government of Bangladesh 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 Bangladesh? 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.