Solar PV Analysis of Siddharthanagar, Nepal
Siddharthanagar, Nepal is a pretty good location for generating solar power throughout the year. The amount of electricity you can get from each kilowatt of installed solar panels varies by season, but it's generally quite high.
In summer and autumn, you can expect around 4.66 and 4.80 kilowatts per hour (kWh) per day respectively. This drops slightly in winter to about 4.07 kWh/day but then jumps up significantly in spring to around 6.40 kWh/day.
This means that spring would be the best time of year for solar energy production at this location due to longer daylight hours and more direct sunlight exposure.
When installing your panels, it's recommended that they are tilted at an angle of 26 degrees facing south to get the most sun exposure throughout the year.
However, like any place on Earth, there could be local factors that might affect how much solar energy you can generate here.
One potential issue could be weather conditions such as heavy monsoon rains or fog which could reduce sunlight availability. Also if there are tall buildings or trees near your installation site they may cast shadows over your panels reducing their efficiency.
To ensure greater energy production despite these challenges:
1) Regularly clean and maintain your panels so dust or debris doesn't block sunlight.
2) If possible choose a site with minimal shade during peak sun hours.
3) Install additional equipment like trackers which allow your panels to follow the sun across the sky maximizing their sunlight exposure.
4) Use high quality durable panels designed to withstand harsh weather conditions common in this region such as heavy rainfall or strong winds.
5) Consider using battery storage systems so excess power generated during sunny periods isn't wasted but stored for use when sunshine is less optimal.
Overall though Siddharthanagar seems well suited for harnessing solar power given its position in Northern Sub Tropics with ample sunshine available especially during spring season.
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 Siddharthanagar
Seasonal solar PV output for Latitude: 27.5065119, Longitude: 83.4376749 (Siddharthanagar, 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 26° South in Siddharthanagar, Nepal
To maximize your solar PV system's energy output in Siddharthanagar, Nepal (Lat/Long 27.5065119, 83.4376749) throughout the year, you should tilt your panels at an angle of 26° 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 Siddharthanagar, 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 Siddharthanagar, Nepal. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 26° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 11° South in Summer | 33° South in Autumn | 43° 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 Siddharthanagar, 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 Siddharthanagar, Nepal.
Our calculation method
- Solar Position:
We determine the Sun's position on the Winter solstice using the location's latitude and solar declination. - Shadow Projection:
We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle. - 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 Siddharthanagar, Nepal
Siddharthanagar, Nepal is located in the Terai plains of southern Nepal and it's close to the Indian border. This region is characterized by flat terrain with fertile soil, which is largely used for agriculture. The elevation of Siddharthanagar is approximately 91 meters above sea level.
In terms of solar PV installation, this area could be quite suitable due to its flat topography making installation easier. However, factors such as local climate conditions (sunlight hours), land use and availability would also need to be considered.
Nearby areas that might also be suited for large-scale solar PV installations include:
1) Butwal: Located north-east from Siddharthanagar, this city has similar topographical features being part of the Terai plains.
2) Bhairahawa: It's another city in the Rupandehi District like Siddharthanagar with similar geographic characteristics.
3) Areas along the East-West Highway: This highway stretches across the entire southern part of Nepal and passes through many parts of Terai plains which are suitable for large-scale solar installations due to their flatness and exposure to sunlight.
However, an actual feasibility study taking into account all relevant factors including local regulations should be conducted before deciding on a location for a large-scale solar PV project.
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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Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Monday 22nd of April 2024
Last Updated: Monday 21st of July 2025
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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.
