As South Africa finds itself well on the way towards a stable and reliable energy supply, it is helpful to look back at solar PV's role. The South African Photovoltaic Industry Association (SAPVIA) investigates common misconceptions about this technology.
The country has enjoyed well over 200 days with no need for loadshedding, which industry association body SAPVIA believes highlights the value of an effective symphony of power options.
“Our industry is proud to have worked alongside our partners in the public sector to support efforts to stabilise our country’s power picture. With the growing demand for renewable energy and the global push towards sustainable living, solar energy has become a key player in the transition towards a low-carbon energy system,” says Dr Rethabile Melamu, CEO of SAPVIA.
“However, many misconceptions about solar energy persist, leading to hesitancy and reluctance among the public to invest in solar solutions. Addressing these misconceptions is critical to ensuring the public understands the true value, cost-effectiveness, and reliability of solar energy, ultimately accelerating South Africa's renewable energy adoption and reducing our carbon footprint,” Melamu continues.
She unpacks some of the most common misconceptions and myths.
- Myth: Solar is not efficient
- A common misconception is that solar panels are inefficient and can’t generate enough electricity to justify their use. However, solar panel efficiency has improved significantly over the years, with most residential panels now converting 18% to 23% of sunlight into usable electricity. While this may sound low, it’s highly efficient given the sun's vast energy. Even though solar panels capture only a fraction of this energy, it’s enough to meet a significant portion of a household’s electricity needs, reducing reliance on the grid and offsetting carbon-intensive energy generation. And best of all, the input energy is free.
- Technological advances have driven both the efficiency and reliability of solar panels. New materials and improved design features allow panels to perform well even in less-than-ideal conditions, making solar a practical and effective energy solution for homeowners.
- Myth: Solar panels don’t work when it is cloudy and/ or cold
- While it’s true that solar panels generate less electricity on overcast days compared to sunny days, they still produce power if there is light. This is because solar panels rely on the photovoltaic effect – the process of converting sunlight into electrical energy.
- Cold temperatures can boost solar panel performance as they work more efficiently in cooler temperatures.
- Myth: Solar is unaffordable
- While the initial investment may seem high, the cost of solar panels has dramatically decreased over the past decade. For example, in 2014, a 250 W residential solar panel cost approximately R5,500 per panel. Today, in 2024, a similar-sized panel costs around R2,000 – a price drop of more than 60%. This steep reduction in price is due to advancements in technology, economies of scale, and increased global demand.
- In addition to lower prices, there are flexible financing options that make solar systems more accessible to homeowners, like leasing options that allow homeowners to install solar systems with little to no upfront cost. This model lets customers pay a monthly fee instead of making a large initial investment, providing immediate savings on electricity bills while spreading the cost over time.
- Furthermore, the payback period for solar installations is shrinking rapidly due to the escalating cost of electricity from Eskom and municipalities.
- Thus, while the upfront costs can still be substantial, the long-term savings from reduced electricity bills often allow a solar system to pay for itself within five to seven years, depending on the size of the installation and the electricity tariff. The savings can be substantial over the system's lifetime (typically 15-20 years), making solar affordable and a smart financial investment.
- Myth: Adding solar means you are off the grid
- Many assume that adding solar panels automatically means living off the grid, which isn’t true for most residential setups. Most homeowners opt for grid-tied systems, which allow them to remain connected to the national grid. This way, they can still draw electricity from the grid when the solar system isn't generating enough power. However, the benefit of solar is that it significantly reduces reliance on grid power, lowering electricity bills.
- Myth: It is complicated to install a solar panel
- If your roof is in a good state, the whole process should not take that long if you are using a reputable service provider – such as someone registered as a member of SAPVIA.
- One of the key tools to ensure a smooth and safe installation process is the PV GreenCard programme. This initiative, developed by SAPVIA, is designed to promote quality installations by offering a standardised set of guidelines and certifications for solar installers.
- Myth: Solar panels have short life spans
- Another common myth is that solar panels don’t last long. The truth is that most high-quality panels come with warranties of up to 25-30 years and are built to withstand extreme weather conditions. Since solar panels have no moving parts, they require very little maintenance over their lifetime so you can expect your panels to be a reliable energy source for decades.
“There are many other myths and misconceptions which make it important to deal with a service provider you can trust. Look for a PV Greencard accredited installer to guide you,” concludes Melamu.