Lalmonirhat, Rangpur Division, Bangladesh offers reasonably good conditions for solar PV energy generation throughout the year, though with some seasonal variation that affects overall efficiency.

Seasonal Solar Performance

The location experiences its best solar energy production during spring, generating 5.72 kWh per day for each kW of installed solar capacity. This represents the peak performance period when solar panels operate at their highest efficiency levels. Summer and autumn provide fairly consistent output at 4.76 kWh/day and 4.81 kWh/day respectively. These seasons offer reliable energy generation that makes solar installations economically viable. Winter presents the most challenging period for solar generation, with output dropping to 4.06 kWh/day per kW installed. While this represents the lowest production season, the output remains substantial enough to justify year-round solar installations.

Optimal Panel Configuration

For fixed panel installations at this location, the ideal angle to tilt panels to maximise total year-round production is 25 degrees facing south. This angle calculation accounts for the Earth's elliptical orbit and weighs daily solar elevation angles against actual solar irradiance data to optimise annual energy capture.

Environmental and Weather Challenges

Several significant local factors can impede solar production in Lalmonirhat:

• Monsoon season brings heavy rainfall and extended cloud cover, particularly during June through September
• High humidity levels throughout the year can reduce panel efficiency and promote corrosion
• Dust and particulate matter accumulation on panels, especially during dry periods
• Frequent thunderstorms and potential cyclone activity during monsoon periods

Preventative Measures for Better Performance

To maximise solar energy production despite these challenges, several installation strategies prove effective:

• Install panels with adequate drainage systems and slight tilting to prevent water pooling during monsoons
• Use corrosion-resistant mounting systems and regular anti-corrosion treatments for metal components
• Implement regular cleaning schedules, particularly before and after dusty seasons
• Install surge protection and grounding systems to protect against lightning damage
• Choose panels with strong wind resistance ratings suitable for tropical storm conditions

Regular maintenance becomes particularly important in this climate, with monthly cleaning and quarterly system inspections helping maintain optimal performance levels throughout the varying seasonal conditions.

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 Lalmonirhat

Seasonal solar PV output for Latitude: 25.9164, Longitude: 89.4425 (Lalmonirhat, 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 25° South in Lalmonirhat, Bangladesh

To maximize your solar PV system's energy output in Lalmonirhat, Bangladesh (Lat/Long 25.9164, 89.4425) throughout the year, you should tilt your panels at an angle of 25° 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 Lalmonirhat, 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 Lalmonirhat, Bangladesh. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 25° 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	32° South in Autumn	41° South in Winter	20° 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 Lalmonirhat, 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 Lalmonirhat, 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 Lalmonirhat, Bangladesh

Topographical Features of Lalmonirhat

Lalmonirhat sits within the vast alluvial plains of northern Bangladesh, forming part of the greater Ganges-Brahmaputra delta system. The terrain around this district is characteristically flat with gentle undulations, typical of the floodplains that dominate much of Bangladesh. The elevation remains consistently low throughout the region, rarely exceeding 30 meters above sea level, creating an expansive landscape of agricultural fields interspersed with settlements and water bodies. The area experiences the influence of several significant rivers, including the Teesta River which flows through the western portion of the district. These waterways have shaped the local topography over millennia, depositing fertile alluvial soil while creating a network of channels, oxbow lakes, and seasonal wetlands. The land gently slopes toward these river systems, with barely perceptible gradients that become apparent only during monsoon flooding periods.

Agricultural Landscape and Land Use

The predominant land use pattern consists of intensive rice cultivation, with fields arranged in a patchwork of small to medium-sized plots separated by earthen embankments called bunds. These agricultural areas are punctuated by rural homesteads surrounded by fruit trees, bamboo groves, and kitchen gardens. The flat terrain facilitates mechanized farming in many areas, though traditional farming methods remain common. During the dry season, much of the agricultural land lies fallow or supports winter crops, creating extensive open areas with minimal vegetation cover. The landscape takes on a golden-brown appearance as harvested rice fields dry out, leaving stubble and bare soil exposed to direct sunlight for extended periods.

Drainage Patterns and Seasonal Variations

The region's drainage system consists of numerous small channels, canals, and seasonal streams that connect to the major river systems. During the monsoon season, water levels rise significantly, and many low-lying areas become temporarily inundated. However, the relatively flat topography ensures that water drains away gradually as the dry season progresses, leaving behind firm, stable ground. The absence of significant hills, forests, or other topographical barriers means that wind patterns flow freely across the landscape. This open terrain experiences minimal shading from natural features, with only scattered trees and rural settlements creating localized shade patterns.

Optimal Areas for Large-Scale Solar Development

The extensive flat agricultural plains surrounding Lalmonirhat present excellent opportunities for large-scale solar photovoltaic installations. The most suitable areas lie in the eastern and southern portions of the district, where the terrain remains consistently level and experiences less frequent flooding compared to areas closer to major rivers. Areas that remain above the typical flood levels during monsoon seasons would be particularly well-suited for solar development. These slightly elevated sections of the alluvial plain offer stable foundations while maintaining the flat topography essential for efficient solar panel installation and maintenance access. The open agricultural landscape provides numerous potential sites where large solar arrays could be established without significant topographical constraints. The absence of steep slopes, rocky outcrops, or dense vegetation means that site preparation costs would be relatively minimal compared to more challenging terrains.

Infrastructure Considerations

The flat topography facilitates road construction and maintenance, with several major highways and rural roads providing access throughout the region. This existing transportation network would support the logistics required for large-scale solar installations, including equipment delivery and ongoing maintenance operations. The proximity to the district headquarters and connection to the national grid system through existing transmission lines makes the area particularly attractive for solar development. The stable, well-drained soils characteristic of the alluvial plains provide suitable foundations for solar mounting systems without requiring extensive ground preparation or specialized engineering solutions.

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.