Delmas, Mpumalanga, South Africa, situated in the Southern Sub Tropics, offers a promising location for solar PV energy generation throughout the year. The town's geographical coordinates (-26.1427, 28.6793) provide favorable conditions for harnessing solar power, with varying levels of efficiency across the seasons.

Seasonal Solar Performance

Solar energy production in Delmas fluctuates seasonally, with spring being the most productive period. During spring, solar panels can generate an impressive 7.01 kWh per day for each kilowatt of installed capacity. Summer follows closely, with 6.26 kWh/day, while autumn sees a slight decrease to 5.78 kWh/day. Winter experiences the lowest output at 4.82 kWh/day, but still maintains a respectable level of energy production.

Optimal Panel Placement

To maximize year-round solar energy production in Delmas, Mpumalanga, fixed solar panels should be tilted at a 25-degree angle facing north. This optimal angle takes into account the town's latitude and seasonal sun positions, ensuring the best possible exposure to sunlight throughout the year.

Environmental Considerations

While Delmas generally offers favorable conditions for solar energy production, there are a few environmental factors to consider. The region experiences occasional dust storms, which can temporarily reduce panel efficiency. To mitigate this issue, regular cleaning and maintenance of solar panels is essential. Additionally, installing panels at a slight angle helps prevent dust accumulation and allows rainwater to naturally clean the surfaces.

Hail storms, though infrequent, can pose a risk to solar installations. To protect against potential damage, it's advisable to use impact-resistant solar panels or install protective covers that can be deployed during severe weather events.

Conclusion

Overall, Delmas presents an ideal location for solar PV energy generation, with consistent sunlight throughout the year and particularly high output during spring and summer months. By implementing proper installation techniques and maintenance practices, solar energy systems in this area can achieve optimal performance and longevity.

Note: The Southern Sub Tropics extend from -23.5° latitude South down to -35° latitude.

So far, we have conducted calculations to evaluate the solar photovoltaic (PV) potential in 196 locations across South Africa. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.

Link: Solar PV potential in South Africa by location

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

Seasonal solar PV output for Latitude: -26.1427, Longitude: 28.6793 (Delmas, South Africa), 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 25° North in Delmas, South Africa

To maximize your solar PV system's energy output in Delmas, South Africa (Lat/Long -26.1427, 28.6793) throughout the year, you should tilt your panels at an angle of 25° 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 Delmas, South Africa

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 Delmas, South Africa. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 25° North tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
10° North in Summer	32° North in Autumn	42° North in Winter	20° 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 Delmas, South Africa

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 Delmas, South Africa.

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 Delmas, South Africa

The topography around Delmas, South Africa, is characterized by gently rolling plains and open grasslands typical of the Highveld region. Located in the Mpumalanga province, Delmas sits at an elevation of approximately 1,600 meters (5,250 feet) above sea level. The landscape is predominantly flat to slightly undulating, with occasional low hills and shallow valleys scattered throughout the area. The surrounding terrain is primarily composed of vast agricultural fields, interspersed with patches of natural vegetation. The soil in this region is generally fertile, supporting extensive farming activities, particularly maize cultivation. Small streams and wetlands can be found in the lower-lying areas, contributing to the local biodiversity and providing water resources for agriculture.

Suitability for Large-Scale Solar PV

The areas surrounding Delmas offer several advantages for large-scale solar photovoltaic (PV) installations. The relatively flat terrain and open spaces provide ideal conditions for the deployment of solar panels, minimizing the need for extensive land preparation or grading. Additionally, the region experiences abundant sunshine throughout the year, making it well-suited for solar energy production. The most suitable areas for large-scale solar PV projects near Delmas would likely be found on the outskirts of the town, where there are expansive tracts of open land. These areas often feature underutilized or marginal agricultural land that could be repurposed for solar energy generation without significantly impacting food production. Locations to the north and east of Delmas may be particularly promising, as they tend to have slightly higher elevations and fewer natural obstacles that could cast shadows on solar panels. These areas also benefit from being relatively close to existing power infrastructure, potentially reducing the costs associated with grid connection. It's important to note that while the topography around Delmas is generally favorable for solar PV development, site-specific assessments would be necessary to determine the most optimal locations. Factors such as proximity to transmission lines, local zoning regulations, and environmental considerations would need to be carefully evaluated before embarking on any large-scale solar projects in the region.

South Africa solar PV Stats as a country

South Africa ranks 21st in the world for cumulative solar PV capacity, with 6,221 total MW's of solar PV installed. This means that 2.00% of South Africa's total energy as a country comes from solar PV (that's 34th in the world). Each year South Africa is generating 105 Watts from solar PV per capita (South Africa ranks 38th in the world for solar PV Watts generated per capita). [source]

Are there incentives for businesses to install solar in South Africa?

Yes, there are several incentives for businesses wanting to install solar energy in South Africa. The government offers a range of financial incentives and tax breaks for businesses that invest in renewable energy projects. These include the Renewable Energy Feed-in Tariff (REFIT) program, which provides long-term contracts with guaranteed prices for electricity generated from renewable sources; the Accelerated Depreciation Allowance (ADA), which allows businesses to deduct up to 50% of their capital expenditure on renewable energy projects from their taxable income; and the Small Scale Embedded Generation (SSEG) program, which provides financial support for small-scale solar installations. Additionally, some local governments offer grants or subsidies to help offset the cost of installing solar systems.

Do you have more up to date information than this on incentives towards solar PV projects in South Africa? 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.