Solar PV Analysis of Grabouw, South Africa
The location at Grabouw, Western Cape, South Africa, is quite good for generating energy via solar photovoltaic (PV) systems throughout the year. However, the amount of electricity produced varies depending on the season.
In simple terms, a solar PV system here can produce an average of 7.89 kilowatt-hours (kWh) per day in summer for each kilowatt (kW) of installed solar power. This decreases to about 4.47 kWh/day in autumn and further drops to around 3.38 kWh/day in winter - which is when you would get the least amount of sun exposure and hence less electricity production from your solar panels. In spring, it increases again to about 6.65 kWh/day.
So if you're planning on using solar power here, keep in mind that summer and spring are going to be your best bets for maximum output as these seasons have more sunlight hours compared to autumn and winter.
If you're installing fixed panel installation at this location, tilting your panels towards North by approximately 30 degrees will help maximize total year-round production from your PV system.
As far as environmental or weather factors go that could affect energy production here - there's nothing significant enough that should deter you from considering a PV system installation at this location.
However, like any other place with varying weather conditions through different seasons; dust accumulation on panels during dry periods could reduce their efficiency slightly over time - but keeping them clean can easily overcome this issue.
Additionally, since Grabouw experiences rainfall especially during winter months; ensuring proper water drainage around your panel installation site can help prevent potential damage or inefficiency caused by stagnant water build-up or flooding situations.
Overall though – with good install practices including optimal tilt angle setting & regular maintenance such as cleaning & checking for potential water logging issues – one should be able to generate a decent amount of electricity using Solar PV systems all-year-round at this location.
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 Grabouw
Seasonal solar PV output for Latitude: -34.1492, Longitude: 19.0144 (Grabouw, 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 Grabouw, South Africa
To maximize your solar PV system's energy output in Grabouw, South Africa (Lat/Long -34.1492, 19.0144) 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 Grabouw, 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 Grabouw, 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 Grabouw, 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 Grabouw, 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 Grabouw, South Africa
Grabouw is located in the Western Cape province of South Africa and is surrounded by a varied topography. The area, which sits in the Elgin Valley, features rolling hills covered with orchards, vineyards, and fynbos - a type of vegetation unique to this region. To the east lies the Groenlandberg Mountain range that forms part of Kogelberg Biosphere Reserve.
The climate in Grabouw is Mediterranean with warm summers and cool winters. It receives quite high rainfall compared to other parts of South Africa which can limit solar potential. However, it still gets significant sunshine hours making solar PV feasible.
Large scale solar PV projects would ideally need large tracts of flat or gently sloping land for maximum efficiency. Areas towards north-west from Grabouw like Caledon or further might be suitable as these areas have more open spaces with less vegetation cover and mountains. Also they are closer to Overberg District Municipality which has seen successful implementation of renewable energy projects including wind and solar farms.
However, any decision on location for large scale Solar PV should also consider factors such as proximity to transmission lines/grid connection points, local regulations/permits for land use change (if required), environmental impact assessments etc., apart from just topography and sunlight availability.
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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Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Monday 27th of May 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.
