Solar PV Analysis of Port Elizabeth, South Africa
Port Elizabeth in South Africa is a good location for generating solar energy throughout the year. The city gets plenty of sunlight, especially in the summer and spring when you can expect to generate around 7.30 kWh and 6.33 kWh per day respectively for each kilowatt of installed solar panels. Even in autumn and winter, you can still produce a decent amount of electricity, about 4.60 kWh and 3.69 kWh per day respectively.
The best time to generate solar power here would be during the summer and spring months due to higher sunlight exposure, but even the less sunny seasons still offer reasonable output levels.
To get the most out of your solar panels in Port Elizabeth, Eastern Cape, they should be tilted at an angle of 30 degrees facing North. This position maximizes their exposure to sunlight throughout the year.
When considering where to install your panels, flat open areas are best as they're easy to work with and don't have much shade that could block out sunlight. Less developed areas slightly inland could also work well as there's less likely to be conflicts over land use or environmental issues.
However, before setting up any large-scale solar projects it's important to conduct a thorough study on factors like land ownership/availability, proximity to grid connections or load centers (like cities or industrial areas), local environmental impacts etc., which might affect installation plans.
Despite being semi-arid with lots of sunshine - ideal conditions for generating solar power - Port Elizabeth does have diverse topography which includes rolling hills that rise into mountains further inland from its mostly flat coastal city area. This means some parts may not be suitable for panel installation due their slope or potential shading issues caused by nearby hills or mountains.
An industrial development zone has already attracted several renewable energy companies because it's strategically located near major transport routes and is designated as a hub for green industries – making it another potentially ideal location within this region.
In terms of weather or environmental factors that could impede solar production, Port Elizabeth's subtropical climate is generally favourable. However, any significant changes in weather patterns such as increased cloud cover or rainfall could potentially reduce the amount of sunlight reaching the panels and thus their energy output. Regular maintenance can help ensure maximum efficiency of the panels despite these potential challenges.
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 Port Elizabeth
Seasonal solar PV output for Latitude: -33.9506, Longitude: 25.6228 (Port Elizabeth, 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 30° North in Port Elizabeth, South Africa
To maximize your solar PV system's energy output in Port Elizabeth, South Africa (Lat/Long -33.9506, 25.6228) throughout the year, you should tilt your panels at an angle of 30° 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 Port Elizabeth, 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 Port Elizabeth, South Africa. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 30° North tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 18° North in Summer | 39° North in Autumn | 49° North in Winter | 27° 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 Port Elizabeth, 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 Port Elizabeth, South Africa.
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 Port Elizabeth, South Africa
Port Elizabeth, also known as Nelson Mandela Bay, is located on the southeastern coast of South Africa. The topography around Port Elizabeth is diverse, with a mix of coastal plains and rolling hills. It's surrounded by the Indian Ocean to the south and east, while inland areas are characterized by low-lying hills and flat areas with vegetation primarily consisting of scrubland.
The climate in Port Elizabeth is warm temperate with significant rainfall throughout the year. However, it does receive ample sunshine hours making it suitable for solar PV installations.
For large-scale solar PV installations, you would ideally need large tracts of flat or gently sloping land that are not shaded and have good exposure to sunlight. Considering this:
1. The Karoo region northwest of Port Elizabeth could be suitable due to its semi-arid conditions and vast open spaces.
2. The inland areas west and north-west of Port Elizabeth also present potential due to their flatter terrain compared to more mountainous regions further north.
3. Areas along the coastal plain may also be suitable if they're not too densely populated or ecologically sensitive.
It's important that any potential site does not interfere with conservation areas or agricultural lands unless there can be a beneficial co-existence (like agri-voltaics). Also, proximity to existing power infrastructure for grid connection would be an advantage.
Finally, any decision should take into account local regulations regarding land use for renewable energy projects as well as community acceptance towards such projects in their vicinity.
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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Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Monday 18th of March 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.
