Solar PV Analysis of Trashi Yangtse, Bhutan
Situated in the Northern Sub Tropics, Trashi Yangtse, Trashi Yangste, Bhutan (coordinates: 27.6092 latitude and 91.5017 longitude) is a promising location for solar photovoltaic (PV) power generation. The seasonal variation in solar energy output at this location is relatively minimal, with Autumn producing the highest average of 4.66 kWh/day per kW of installed solar capacity, followed by Spring with an average of 4.74 kWh/day per kW. Summer yields an average output of 4.48 kWh/day per kW while Winter sees a slightly lower production rate at an average of 4.04 kWh/day per kW.
The optimal tilt angle for fixed panel installations at this site is determined to be approximately 27 degrees facing Southward which maximizes sun exposure throughout the year.
Trashi Yangtse's climate generally presents favourable conditions for solar PV generation due to its mild weather patterns throughout the year that are devoid of severe disruptions such as storms or heavy snowfall.
However, it's worth noting that Bhutan's topography could potentially pose challenges to solar installation and production due to its mountainous terrain which can create variable sunlight exposure across different areas within close proximity and may obstruct direct sunlight on some occasions.
To mitigate these potential issues during installation phase, thorough site analysis should be conducted prior to determine optimal positioning and alignment based on local topography features so as to maximize sun exposure over the course of a day and across different seasons.
In summary, Trashi Yangtse offers viable conditions for harnessing renewable energy through solar PV systems given its geographical position in relation with sun path combined with favourable climatic conditions year-round despite potential minor challenges related to local topography that can be managed through careful planning during installation phase.
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 7 locations across Bhutan. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.
Link: Solar PV potential in Bhutan by location
Solar output per kW of installed solar PV by season in Trashi Yangtse
Seasonal solar PV output for Latitude: 27.6092, Longitude: 91.5017 (Trashi Yangtse, Bhutan), 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 Trashi Yangtse, Bhutan
To maximize your solar PV system's energy output in Trashi Yangtse, Bhutan (Lat/Long 27.6092, 91.5017) 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 Trashi Yangtse, Bhutan
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 Trashi Yangtse, Bhutan. 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 |
|---|---|---|---|
| 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 Trashi Yangtse, Bhutan
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 Trashi Yangtse, Bhutan.
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 Trashi Yangtse, Bhutan
The topography around Trashi Yangtse, Bhutan is mountainous and hilly. Areas in the valley or on south-facing slopes with good access to sunlight would be most suited for large scale solar PV installations. The nearby town of Nangkor has plenty of open space that could be used for such projects.
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Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Sunday 12th of November 2023
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.
