Gafargaon, Mymensingh Division, Bangladesh presents a moderately good location for year-round solar energy generation, though it experiences significant seasonal variation in output that potential solar installers should understand.

Seasonal Solar Performance

The solar energy output at this Northern Sub Tropical location varies considerably throughout the year. Spring emerges as the most productive season, delivering 5.78kWh per day for each kilowatt of installed solar capacity. This makes it the ideal time for maximum energy generation at this site. Autumn provides the second-best performance at 4.81kWh per day per kW, followed by summer at 4.39kWh per day per kW. Winter presents the most challenging conditions for solar generation, producing only 3.92kWh per day per kW - representing about 32% less energy than the peak spring period. For optimal year-round energy production, solar panels should be installed at a fixed tilt angle of 23 degrees facing south. This angle maximizes total annual solar output by accounting for the sun's changing position throughout the year and the varying solar irradiance levels at this latitude.

Environmental and Weather Challenges

Several significant local factors can impede solar production in Gafargaon and require careful consideration during installation planning. The monsoon season presents the most substantial challenge, typically occurring from June through September. Heavy rainfall, persistent cloud cover, and high humidity during this period can dramatically reduce solar output. The monsoon coincides partly with summer and early autumn, which helps explain the relatively lower output during these seasons compared to spring. Dust accumulation poses another serious concern, particularly during dry periods. Bangladesh's agricultural landscape and frequent dust storms can coat solar panels, reducing their efficiency by blocking sunlight from reaching the photovoltaic cells. High humidity levels throughout much of the year can create additional maintenance challenges and potentially affect electrical connections and equipment longevity.

Preventative Measures for Better Performance

Several installation strategies can help maximize solar energy production despite these environmental challenges:

• Install panels with adequate spacing and ventilation to prevent moisture buildup and allow proper air circulation
• Use high-quality weatherproof mounting systems and electrical components rated for tropical conditions
• Implement regular cleaning schedules, especially during dusty periods and after monsoon seasons
• Consider installing panels at slightly steeper angles than the optimal 23 degrees in areas prone to dust accumulation, as this helps with self-cleaning during rainfall
• Ensure proper drainage around installation areas to prevent water pooling and flooding during heavy rains

Despite these challenges, Gafargaon's location offers reasonable solar potential, particularly during the excellent spring season and good autumn period. With proper installation techniques and maintenance practices, solar installations can perform effectively year-round, though owners should expect and plan for the seasonal variations in energy output.

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 Gafargaon

Seasonal solar PV output for Latitude: 24.434, Longitude: 90.5547 (Gafargaon, 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 Gafargaon, Bangladesh

To maximize your solar PV system's energy output in Gafargaon, Bangladesh (Lat/Long 24.434, 90.5547) 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 Gafargaon, 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 Gafargaon, 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 Gafargaon, 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 Gafargaon, 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 Gafargaon, Bangladesh

Topographical Features of Gafargaon

Gafargaon is situated in the Mymensingh district of Bangladesh, positioned within the greater Brahmaputra river basin. The topography around this area is characteristically flat to gently undulating, typical of the Bengal Delta region. The landscape consists primarily of alluvial plains formed by centuries of river sediment deposits, creating a relatively uniform terrain with minimal elevation changes across the region. The area experiences a predominantly low-lying geography, with elevations generally ranging from 8 to 15 meters above sea level. Small variations in the landscape include natural levees along waterways and slightly elevated areas that remain above flood levels during monsoon seasons. The terrain is intersected by numerous rivers, streams, and seasonal watercourses that drain into the larger Brahmaputra river system. Agricultural land dominates the surrounding landscape, with extensive rice paddies, crop fields, and scattered homesteads creating a patchwork pattern across the plains. The region features typical deltaic characteristics including numerous ponds, wetlands, and seasonal flooding areas that become waterlogged during the monsoon period.

Optimal Areas for Large-Scale Solar Development

The relatively flat topography around Gafargaon presents several advantages for large-scale solar photovoltaic installations. The most suitable areas would be the elevated agricultural lands that remain above seasonal flood levels, particularly those located on natural levees and slightly higher ground formations. These areas provide stable foundations while maintaining good drainage characteristics essential for solar infrastructure. Areas to the north and northeast of Gafargaon appear particularly promising, where the terrain shows less susceptibility to seasonal flooding and maintains consistent elevation above surrounding wetlands. The agricultural plains in these directions offer extensive flat surfaces with minimal shading obstacles, making them ideal candidates for solar array deployment. The western approaches to Gafargaon also present viable options, especially on lands that demonstrate historical resilience to monsoon flooding. These areas benefit from good accessibility via existing road networks while maintaining sufficient distance from major waterways that could pose flooding risks to solar installations. When selecting specific sites, priority should be given to areas with established drainage systems, proximity to electrical grid infrastructure, and land that historically remains dry throughout seasonal weather patterns. The gentle slopes found on natural levees provide excellent drainage while maintaining the flat orientation necessary for optimal solar panel positioning.

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.