Solar PV Analysis of Kigali, Rwanda
Kigali, Rwanda (Lat/Long -1.9507, 30.0663) is well-suited for solar PV generation due to its location within the Tropics, where seasons are primarily distinguished by wet and dry periods rather than temperature fluctuations. Consequently, this region experiences consistent sunlight for most of the year, resulting in substantial electricity generation per kW of installed solar on average: 4.98 kWh/day in summer; 5.39 kWh/day in autumn; 5.65 kWh/day in winter; and 5.44 kWh/day in spring.
Although heavy rain or storms may occasionally impact solar PV power generation, these events should be relatively infrequent given Kigali's tropical climate with consistent sunlight throughout the year.
In terms of maximizing energy production at this location, a fixed panel installation with a tilt angle of 3 degrees North is recommended to optimize exposure to sunlight across all seasons.
It's worth noting that local factors such as topography and environmental conditions could potentially affect solar production efficiency at specific sites within Kigali. For example, areas with significant shading from hills or vegetation may experience reduced energy output from their solar panels.
To mitigate these potential impediments to efficient solar power generation, it's essential to carefully assess each installation site beforehand and implement appropriate measures such as strategic placement of panels or trimming vegetation that might obstruct direct sunlight access if necessary.
Overall, Kigali presents an excellent opportunity for harnessing solar power throughout the year due to its favorable climate conditions and consistent sunlight availability.
Note: The Tropics are located between 23.5° North and -23.5° South of the equator.
So far, we have conducted calculations to evaluate the solar photovoltaic (PV) potential in 6 locations across Rwanda. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.
Link: Solar PV potential in Rwanda by location
Solar output per kW of installed solar PV by season in Kigali
Seasonal solar PV output for Latitude: -1.9507, Longitude: 30.0663 (Kigali, Rwanda), 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 3° North in Kigali, Rwanda
To maximize your solar PV system's energy output in Kigali, Rwanda (Lat/Long -1.9507, 30.0663) throughout the year, you should tilt your panels at an angle of 3° North 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 Kigali, Rwanda
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 Kigali, Rwanda. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 3° North tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 14° South in Summer | 8° North in Autumn | 18° North in Winter | 4° 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 Kigali, Rwanda
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 Kigali, Rwanda.
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 Kigali, Rwanda
The topography around Kigali, Rwanda is mostly flat and rolling hills. Areas to the north and east of Kigali are more hilly than those to the south and west. The most suitable areas for large-scale solar PV installations would be in the flatter areas to the south and west of Kigali as these will receive higher levels of direct sunlight throughout the year. Additionally, any open fields or grasslands away from tall buildings or trees would also provide good locations for solar PV installations.
Citation Guide
Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Tuesday 6th of June 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.
