Kurigram, Rangpur Division, Bangladesh presents a moderately favorable location for year-round solar photovoltaic energy generation. Located in the northern subtropics at coordinates 25.7277°N, 89.5978°E, this area experiences seasonal variations in solar energy output that make it reasonably suitable for solar installations.

Seasonal Solar Performance

The solar energy production at Kurigram varies significantly throughout the year. Spring emerges as the most productive season, generating 5.72 kWh per day per kW of installed solar capacity. This peak performance period makes spring an excellent time for maximizing solar energy harvest. Autumn follows closely behind with 4.81 kWh per day per kW, while summer produces 4.76 kWh per day per kW. Winter shows the lowest output at 4.06 kWh per day per kW, representing about 29% less energy generation compared to the peak spring season. For optimal year-round performance, solar panels at this location should be installed at a fixed tilt angle of 24 degrees facing south. This angle maximizes total annual solar production by accounting for the sun's varying position throughout the year and the Earth's elliptical orbit.

Environmental and Weather Challenges

Several significant environmental factors in Kurigram can impede solar energy production and require careful consideration during installation:

• Monsoon Season: Bangladesh experiences intense monsoon rains typically from June to September, which can dramatically reduce solar output due to heavy cloud cover and frequent storms
• High Humidity: The subtropical climate creates consistently high humidity levels that can cause corrosion and reduce panel efficiency over time
• Dust and Particulate Matter: The region's agricultural activities and occasional dust storms can coat solar panels, significantly reducing their light absorption capacity
• Cyclones and Severe Weather: Being in Bangladesh, the area is susceptible to tropical cyclones and severe weather events that can damage solar installations
• Flooding: Kurigram is prone to seasonal flooding, which can damage ground-mounted systems and electrical components

Preventative Installation Measures

To maximize energy production and system longevity in Kurigram's challenging environment, several preventative measures should be implemented:

• Elevated Mounting: Install panels on elevated structures or rooftops well above potential flood levels to prevent water damage
• Corrosion-Resistant Materials: Use marine-grade aluminum frames and stainless steel mounting hardware to withstand high humidity and moisture
• Enhanced Drainage: Design mounting systems with excellent drainage to prevent water accumulation around electrical components
• Wind-Resistant Design: Employ robust mounting systems rated for high wind speeds to withstand cyclonic conditions
• Regular Cleaning Protocol: Establish frequent panel cleaning schedules, particularly during dusty seasons, to maintain optimal light transmission
• Protective Enclosures: House inverters and electrical components in weatherproof, ventilated enclosures with proper sealing against moisture intrusion

Despite these challenges, Kurigram's solar potential remains viable for energy generation, particularly during the highly productive spring season. With proper installation techniques and regular maintenance, solar PV systems can perform effectively in this subtropical environment while overcoming the region's environmental obstacles.

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 Kurigram

Seasonal solar PV output for Latitude: 25.7277, Longitude: 89.5978 (Kurigram, 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 24° South in Kurigram, Bangladesh

To maximize your solar PV system's energy output in Kurigram, Bangladesh (Lat/Long 25.7277, 89.5978) throughout the year, you should tilt your panels at an angle of 24° 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 Kurigram, 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 Kurigram, Bangladesh. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 24° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
10° South in Summer	31° South in Autumn	41° South in Winter	19° 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 Kurigram, 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 Kurigram, 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 Kurigram, Bangladesh

Topographical Characteristics of Kurigram

Kurigram district sits in the northern region of Bangladesh, characterized by an exceptionally flat and low-lying landscape typical of the greater Bengal Delta. The area lies at an elevation of just 18 meters above sea level, with minimal variation in height across the entire district. This remarkably uniform topography creates an expansive plain that stretches as far as the eye can see, broken only by the meandering courses of several major rivers. The region is dominated by the confluence of three significant waterways: the Brahmaputra River (known locally as the Jamuna), the Dharla River, and the Dudhkumar River. These rivers have shaped the landscape over millennia, depositing fertile alluvial sediments that have created the characteristic flat terrain. The land gently slopes toward these river channels, but the gradient is so subtle that it's barely perceptible to the naked eye.

River Systems and Seasonal Changes

The extensive river network creates a complex pattern of channels, islands, and floodplains throughout the area. During the monsoon season, much of the low-lying land becomes inundated, transforming the landscape into a vast wetland interspersed with slightly higher ground that remains above water. These seasonal floods deposit fresh layers of silt, maintaining the region's fertility but also creating challenges for permanent infrastructure development. The rivers are highly dynamic, constantly changing their courses and creating new channels while abandoning others. This process, known as river meandering, results in the formation of oxbow lakes, abandoned channels, and shifting islands called chars. The landscape is therefore in constant flux, with new land appearing and disappearing based on the rivers' movements.

Soil Composition and Land Use

The soil throughout Kurigram consists primarily of fertile alluvial deposits brought down from the Himalayas by the river systems. These sediments create a rich, dark soil that is excellent for agriculture but can present challenges for heavy construction due to its soft, sometimes unstable nature. The land is predominantly used for rice cultivation, with vast paddy fields extending across the horizon during the growing season.

Most Suitable Areas for Large-Scale Solar Development

Given the topographical constraints and opportunities in the Kurigram region, several factors determine the most appropriate locations for extensive solar installations. The areas with the greatest potential lie on the higher ground that remains above flood level during monsoon seasons. These elevated zones, though still relatively flat, provide more stable foundations and reduced risk of seasonal inundation. The char lands, which are the river islands and newly formed alluvial deposits, often present excellent opportunities for solar development. Many of these areas remain unused for permanent agriculture due to their recent formation and potential for future river course changes. Their flat, open nature and lack of existing infrastructure make them ideal candidates for large solar arrays, provided proper flood protection measures are implemented. Areas along the western and southwestern portions of the district tend to be slightly more elevated and experience less severe flooding compared to zones immediately adjacent to the major rivers. These locations offer better long-term stability for permanent solar installations while still maintaining the flat topography that facilitates efficient panel placement and maintenance access. The most promising sites are those that combine several favorable characteristics: elevation above typical flood levels, proximity to existing electrical infrastructure, accessibility via road networks, and minimal conflict with prime agricultural land. These areas typically lie in a band running parallel to but set back from the major river channels, where the land has had time to stabilize but still benefits from the flat deltaic topography.

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.

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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.