Solwezi, Zambia, located at latitude -12.1646 and longitude 26.3976, presents a favorable environment for solar energy generation throughout the year. This tropical location benefits from consistent sunlight, with seasons primarily characterized by wet and dry periods rather than significant temperature variations.

Seasonal Solar Performance

The solar energy potential in Solwezi remains relatively stable across all seasons, with slight variations: Spring stands out as the most productive season, yielding an impressive 6.66 kWh per day for each kilowatt of installed solar capacity. Winter follows closely with 6.23 kWh/day, while autumn and summer produce 5.99 kWh/day and 5.72 kWh/day, respectively. This consistent performance throughout the year makes Solwezi an ideal location for solar PV installations, as it ensures a reliable energy supply regardless of the season.

Optimal Panel Tilt

For fixed solar panel installations in Solwezi, the ideal tilt angle to maximize year-round energy production is 13 degrees facing North. This angle has been calculated taking into account the location's latitude, daily solar elevation angles, and potential PV output throughout the year.

Environmental Considerations

While Solwezi's climate is generally conducive to solar energy production, there are a few factors to consider: 1. Rainfall: The wet season, typically from November to April, may lead to increased cloud cover and potentially reduced solar output. 2. Dust: During the dry season, dust accumulation on solar panels could slightly decrease efficiency. To mitigate these issues, consider implementing regular cleaning schedules for the panels, especially during the dry season. Additionally, installing panels at the recommended 13-degree tilt will help with natural cleaning during rainfall events.

Conclusion

Overall, Solwezi's location in Zambia proves to be highly suitable for solar PV installations. The consistent year-round sunlight and relatively minor seasonal variations in energy output make it an excellent choice for sustainable energy production. With proper installation and maintenance practices, solar energy systems in this area can provide a reliable and efficient source of renewable energy throughout the year.

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 8 locations across Zambia. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.

Link: Solar PV potential in Zambia by location

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

Seasonal solar PV output for Latitude: -12.1646, Longitude: 26.3976 (Solwezi, Zambia), 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 13° North in Solwezi, Zambia

To maximize your solar PV system's energy output in Solwezi, Zambia (Lat/Long -12.1646, 26.3976) throughout the year, you should tilt your panels at an angle of 13° 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 Solwezi, Zambia

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 Solwezi, Zambia. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 13° North tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
4° South in Summer	19° North in Autumn	28° North in Winter	6° North 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 Solwezi, Zambia

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 Solwezi, Zambia.

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 Solwezi, Zambia

The topography around Solwezi, Zambia is characterized by gently rolling hills and plateaus, typical of the region's landscape. Solwezi sits at an elevation of approximately 1,300 meters (4,265 feet) above sea level, placing it in the higher elevations of Zambia. The surrounding area features a mix of open grasslands, scattered woodlands, and some forested areas, particularly along river valleys.

The terrain gradually rises towards the north and west of Solwezi, with some areas reaching elevations of up to 1,500 meters (4,921 feet). To the south and east, the land tends to be slightly lower, with occasional flat plains interspersed among the rolling hills. Several small rivers and streams crisscross the region, contributing to the undulating nature of the landscape.

For large-scale solar PV installations, the areas most suited would likely be the open, gently sloping plains to the south and east of Solwezi. These locations offer several advantages for solar energy production:

1. They tend to have fewer trees and obstructions, allowing for maximum sun exposure throughout the day.
2. The gentle slopes can provide natural drainage, reducing the risk of water accumulation on solar panels.
3. These areas are generally more accessible, making it easier to transport equipment and maintain the solar installations.
4. The slightly lower elevation compared to the northern regions may result in less cloud cover, potentially increasing solar energy capture.

It's important to note that while these areas may be generally suitable, a thorough site-specific assessment would be necessary to determine the optimal location for a large-scale solar PV project. Factors such as local weather patterns, soil stability, proximity to power infrastructure, and environmental considerations would all need to be taken into account before finalizing any plans for solar energy development in the region.

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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.