Gauradaha, Koshi, Nepal presents a reasonably good location for year-round solar PV energy generation, though with notable seasonal variations that potential installers should consider carefully.

Seasonal Solar Performance

The solar energy output at this Northern Sub Tropical location shows distinct seasonal patterns. Spring emerges as the most productive season, delivering 5.59kWh per day per kW of installed solar capacity. Autumn follows closely with 4.54kWh/day, while summer provides 4.46kWh/day. Winter represents the least productive period at 3.73kWh/day per kW installed. This seasonal variation means that solar installations in Gauradaha will generate approximately 50% more electricity during peak spring months compared to winter periods. The relatively strong performance during autumn and decent summer output help balance the annual energy production profile.

Optimal Panel Configuration

For fixed panel installations at Gauradaha, Koshi, the ideal tilt angle is 25 degrees facing south to maximize total year-round solar production. This angle has been calculated by analyzing daily solar elevation angles at this latitude, determining optimal panel positioning, and weighting these angles according to solar irradiance data throughout the year.

Environmental and Weather Challenges

Several local factors could potentially impact solar energy production at this Nepal location:

• Monsoon Season: Nepal experiences intense monsoon rains typically from June to September, which can significantly reduce solar irradiance due to heavy cloud cover and frequent storms
• Dust and Particulates: The region's proximity to agricultural areas and unpaved roads can lead to dust accumulation on solar panels, reducing efficiency
• High Humidity: The subtropical climate brings elevated humidity levels that can affect equipment performance and longevity
• Temperature Extremes: Seasonal temperature variations can impact panel efficiency, with very hot summers potentially reducing output

Preventative Measures for Better Performance

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

• Regular Cleaning Systems: Install automated cleaning systems or establish frequent manual cleaning schedules to remove dust and debris, particularly important during dry seasons
• Proper Ventilation: Ensure adequate airflow around panels to prevent overheating and maintain optimal operating temperatures
• Quality Mounting Systems: Use corrosion-resistant mounting hardware designed for high-humidity environments
• Drainage Considerations: Design installations with proper drainage to handle monsoon rainfall and prevent water accumulation
• Component Selection: Choose solar panels and inverters rated for tropical conditions with appropriate temperature coefficients

Despite these environmental challenges, Gauradaha's solar potential remains viable for year-round energy generation, particularly when proper installation techniques and maintenance practices are implemented to address local 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 40 locations across Nepal. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.

Link: Solar PV potential in Nepal by location

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

Seasonal solar PV output for Latitude: 26.5665, Longitude: 87.7244 (Gauradaha, Nepal), 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 Gauradaha, Nepal

To maximize your solar PV system's energy output in Gauradaha, Nepal (Lat/Long 26.5665, 87.7244) 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 Gauradaha, Nepal

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 Gauradaha, Nepal. 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	42° South in Winter	21° 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 Gauradaha, Nepal

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 Gauradaha, Nepal.

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 Gauradaha, Nepal

Topographical Features of Gauradaha

Gauradaha is situated in the eastern Terai region of Nepal, positioned within the flat alluvial plains that characterize this part of the country. The landscape around this area consists predominantly of gentle, low-lying terrain that gradually slopes southward toward the Indian border. The elevation remains relatively consistent across the region, creating an expansive flatland environment that extends for considerable distances in multiple directions.

The topography is shaped by the Koshi River system and its tributaries, which have deposited fertile sediments across the plains over millennia. This has resulted in a remarkably uniform landscape with minimal elevation changes, occasional gentle undulations, and scattered agricultural fields that dominate the visual character of the area. The terrain lacks significant hills, ridges, or mountainous features, though the distant Himalayan foothills are visible to the north on clear days.

Drainage and Water Features

The region's drainage pattern follows a north-south orientation, with several seasonal streams and irrigation channels crisscrossing the landscape. During monsoon periods, these waterways can expand significantly, creating temporary wetland conditions in lower-lying areas. The relatively flat nature of the terrain means that water drainage can be slow, leading to occasional waterlogging in certain zones during heavy rainfall periods.

Small ponds and agricultural reservoirs dot the landscape, primarily serving irrigation purposes for the extensive rice paddies and other crops cultivated throughout the area. These water bodies are generally shallow and seasonal in nature, with water levels fluctuating considerably between wet and dry seasons.

Optimal Areas for Large-Scale Solar Development

The expansive flat terrain surrounding Gauradaha presents excellent opportunities for large-scale solar photovoltaic installations. The most suitable areas would be the elevated sections of agricultural land that remain above seasonal flood levels, particularly those located on slightly higher ground to the north and west of the immediate settlement area.

Areas with well-draining soil conditions and minimal risk of waterlogging would be preferable for solar infrastructure. The open agricultural plains extending eastward and westward from Gauradaha offer particularly promising sites, as they combine favorable topographical conditions with relatively easy access for construction and maintenance activities. These zones typically feature stable ground conditions and unobstructed southern exposure across vast areas.

The region's lack of significant topographical barriers means that large solar arrays could be developed without concerns about shading from hills or ridges. The consistent elevation and gentle terrain would facilitate efficient installation processes and minimize the need for extensive ground preparation or grading work. Areas slightly removed from the main river channels and seasonal flood zones would provide the most reliable foundation conditions for permanent solar infrastructure.

Nepal solar PV Stats as a country

Nepal ranks 89th in the world for cumulative solar PV capacity, with 93 total MW's of solar PV installed. This means that 0.10% of Nepal's total energy as a country comes from solar PV (that's 43rd in the world). Each year Nepal is generating 3 Watts from solar PV per capita (Nepal ranks 86th in the world for solar PV Watts generated per capita). [source]

Are there incentives for businesses to install solar in Nepal?

Yes, there are incentives for businesses wanting to install solar energy in Nepal. The Government of Nepal 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 established 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 Nepal? 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.