Bharatpur, Nepal offers excellent conditions for year-round solar energy generation, making it a highly suitable location for solar PV installations. Located in the Northern Sub Tropics at coordinates 28.0292, 82.4834, this region demonstrates consistently strong solar energy potential throughout all seasons.

Seasonal Solar Performance

The solar energy output at Bharatpur shows impressive consistency across the year, with some notable seasonal variations:

• Spring delivers the highest output at 6.31kWh per day per kW of installed solar capacity
• Autumn provides 4.58kWh per day per kW
• Summer generates 4.38kWh per day per kW
• Winter produces 4.24kWh per day per kW

Spring emerges as the optimal season for solar generation, producing nearly 50% more energy than other seasons. This makes March through May the peak period for solar energy production at this location. Even during the lowest-performing season (winter), the output remains quite respectable at over 4kWh per day per kW.

Optimal Panel Configuration

For maximum year-round energy production at Bharatpur, solar panels should be installed at a fixed tilt angle of 27 degrees facing south. This angle has been calculated to optimize total annual solar output by accounting for the sun's varying elevation throughout the year and weighting these angles based on actual solar irradiance data.

Environmental and Weather Challenges

Several local factors could potentially impact solar energy production at Bharatpur and require careful consideration during installation planning. The monsoon season, typically occurring from June to September, brings heavy rainfall and increased cloud cover that can significantly reduce solar output. While the seasonal data already accounts for average weather patterns, extended periods of heavy monsoon activity could temporarily decrease energy production below expected levels. Dust accumulation presents another significant challenge, particularly during dry periods before and after the monsoon season. Nepal's location and local agricultural activities can generate substantial dust that settles on solar panels, creating a barrier that reduces light transmission and energy output. High humidity levels, especially during monsoon periods, can create moisture-related issues if panels and electrical components aren't properly sealed and protected.

Preventative Measures for Optimal Performance

Several installation strategies can help maximize solar energy production despite these environmental challenges. Installing panels with adequate spacing and proper drainage systems ensures rainwater can effectively wash away dust and debris naturally during monsoon periods. This self-cleaning effect helps maintain panel efficiency. Choosing high-quality panels with robust anti-reflective coatings and sealed electrical connections protects against humidity and moisture infiltration. Proper grounding and surge protection also safeguard against electrical issues during storms. Regular maintenance scheduling becomes crucial, particularly cleaning panels before and after monsoon seasons when dust accumulation is highest. Establishing accessible panel layouts during installation makes this maintenance more practical and cost-effective. Investing in monitoring systems allows for early detection of performance drops, enabling prompt maintenance responses when environmental factors begin impacting energy production. Overall, Bharatpur represents an excellent location for solar energy generation, with strong year-round output potential that can be maximized through thoughtful installation design and regular maintenance practices.

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 Bharatpur, Lumbini Province

Seasonal solar PV output for Latitude: 28.0292, Longitude: 82.4834 (Bharatpur, Lumbini Province, 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 27° South in Bharatpur, Lumbini Province, Nepal

To maximize your solar PV system's energy output in Bharatpur, Lumbini Province, Nepal (Lat/Long 28.0292, 82.4834) throughout the year, you should tilt your panels at an angle of 27° 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 Bharatpur, Lumbini Province, 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 Bharatpur, Lumbini Province, Nepal. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 27° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
12° South in Summer	34° South in Autumn	43° South in Winter	22° 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 Bharatpur, Lumbini Province, 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 Bharatpur, Lumbini Province, 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 Bharatpur, Lumbini Province, Nepal

Topographical Features of Bharatpur Region

Bharatpur sits in the Terai plains of south-central Nepal, positioned at approximately 200 meters above sea level in the Chitwan District. This location places it within one of Nepal's flattest and most expansive lowland regions, characterized by gently rolling terrain that extends southward toward the Indian border. The landscape around Bharatpur represents a dramatic contrast to the mountainous regions that dominate much of Nepal, offering relatively level ground that stretches across the Chitwan Valley.

The topography in this area is predominantly shaped by alluvial deposits from rivers flowing down from the Himalayan foothills. The terrain features subtle undulations and gentle slopes, with most elevation changes being gradual rather than steep. Small ridges and low hills occasionally break the otherwise flat expanse, but these features rarely exceed 50 meters in height above the surrounding plains.

Several significant rivers traverse the region, including the Narayani River system and various tributaries that create natural boundaries and influence local drainage patterns. These waterways have carved shallow valleys through the landscape over millennia, creating a network of gentle depressions and slightly elevated areas between river channels.

Climate and Environmental Conditions

The Bharatpur area experiences a subtropical climate with distinct wet and dry seasons. The relatively low elevation and position in the Terai belt create favorable conditions for consistent solar exposure throughout much of the year. The flat terrain minimizes the shadowing effects that would be common in mountainous regions, allowing for more uniform solar irradiance across large areas.

Seasonal variations in weather patterns do affect solar potential, with the monsoon period bringing increased cloud cover and precipitation. However, the extended dry season provides excellent conditions for solar energy generation, with clear skies and minimal atmospheric interference being common during these periods.

Optimal Areas for Large-Scale Solar Development

The most suitable locations for large-scale solar photovoltaic installations around Bharatpur would be the extensive flat agricultural areas that dominate the landscape to the south and east of the city. These areas offer several key advantages including minimal slope variations, excellent accessibility via existing road networks, and proximity to electrical infrastructure.

The plains extending toward the Parsa District boundary present particularly promising opportunities, as this region combines optimal topographical conditions with relatively sparse population density. The terrain in these areas typically exhibits slopes of less than two degrees, which is ideal for ground-mounted solar arrays and minimizes the need for extensive site preparation or grading work.

Areas located between the major river systems also offer excellent potential, as they tend to be well-drained and less prone to seasonal flooding while maintaining the flat topography essential for efficient solar installations. The elevated areas between river valleys, though still relatively flat, provide natural drainage advantages that could reduce maintenance requirements and improve long-term system reliability.

The western approaches to Bharatpur, where the terrain begins its gradual transition toward the Mahabharat hills, present mixed opportunities. While still relatively flat compared to Nepal's mountainous regions, these areas feature more pronounced elevation changes that could create shadowing issues and increase installation complexity. However, south-facing slopes in these transitional zones could potentially offer excellent solar exposure if properly oriented.

Agricultural areas currently used for seasonal crops would be particularly well-suited for solar development, as the existing land use patterns demonstrate the suitability of soil conditions and drainage characteristics. The flat, cleared nature of these areas would minimize environmental disruption while providing the large contiguous spaces necessary for utility-scale solar installations.

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.