Bringing a modern, sustainable technology solution to a historically significant site, ABB has provided a microgrid system to integrate solar energy and supply power to Robben Island, the place where Nelson Mandela spent 18 years in prison during the apartheid era. Now a living museum and World Heri Contact online >>
Bringing a modern, sustainable technology solution to a historically significant site, ABB has provided a microgrid system to integrate solar energy and supply power to Robben Island, the place where Nelson Mandela spent 18 years in prison during the apartheid era. Now a living museum and World Heritage Site, Robben Island lies 9 kilometers off the coast of Cape Town and previously relied on fuel-thirsty, carbon-emitting diesel generators as the only source of electric power.
Essentially a small-scale electric grid, the new microgrid will substantially lower fuel costs and carbon emissions, enabling the island to run on solar power for at least nine months of the year. The microgrid project is part of a sustainable tourism initiative funded by the Department of Tourism in South Africa and was executed for SOLA Future Energy, an engineering, procurement and contracting company.
ABB is a pioneer in microgrids, which because of their size and power are ideal for remote locations like islands, which cannot easily be connected to the main power grid. That is particularly the case with Robben Island, which served as a prison for nearly 400 years because the strong currents around the 4.8 square km island made escape almost impossible.
Robben Island became a symbol of non-violent anti-apartheid resistance during and after the imprisonment of Mr. Mandela, who after his release became president in 1994 and led South Africa through the early years of its transition. The Robben Island Museum, which opened in 1997, is today one of South Africa''s most popular tourist sites. It receives more than 300,000 visitors a year, who come to the island by ferry and are led on guided tours by former political prisoners.
With about 100 museum staff living on the island, which also has a working lighthouse and busy harbor, Robben Island has the electricity requirements of a small village. The microgrid will capture solar energy from a 667-kilowatt peak photovoltaic field - equivalent to the average power needed for about 130 homes - that has been installed on the island.
The system is equipped with ABB solar inverters that convert the variable direct current (DC) output from the solar panels into the alternating current (AC) required for electric utilities. As the main energy source, the microgrid will reduce carbon emissions and the fuel demands of the diesel generators, which previously required around 600,000 liters of fuel a year but now will serve primarily as a back-up.
An ABB Ability™ wireless network connects the solar plant to the microgrid providing reliable and secure communications. An operations center in Cape Town is capable of monitoring and controlling the Microgrid. The remote set-up eliminates the need to maintain a workforce on the island, whose volatile weather can sometimes impede travel to and from the mainland. The wireless solution has also eliminated the need for cable trenches, helping preserve the local habitat on the World Heritage Site.
"ABB''s microgrid solution integrates solar energy and curtails the use of fossil fuels to power Robben Island, bringing substantial cost efficiencies and supporting the Department of Tourism''s efforts to keep the heritage and spirit of this world renowned island alive," said Claudio Facchin, president of ABB''s Power Grids division. "The project supports our focus on microgrids and our ongoing commitment to reduce environmental impact as a partner of choice for enabling a stronger, smarter and greener grid."
ABB''s containerized, modular plug-and-play microgrid solution includes an ABB Ability PowerStore™ battery energy storage system and the dedicated Microgrid Plus control system, whose internet cloud-based capabilities make remote operation possible. The control system enables management of the power supply, including energy storage and balancing of the use of renewable energy and diesel back-up in accordance with changing demand.
ABB has around 40 microgrid installations around the world, across a diverse range of applications serving remote communities, islands, utilities and industrial campuses.
ABB (ABBN: SIX Swiss Ex) is a pioneering technology leader in electrification products, robotics and motion, industrial automation and power grids, serving customers in utilities, industry and transport & infrastructure globally. Continuing a more than 125-year history of innovation, ABB today is writing the future of industrial digitalization and driving the Energy and Fourth Industrial Revolutions. ABB operates in more than 100 countries with about 136,000 employees.
Our experienced team engages in strategic planning conversations to support your decision-making process. We work with you to understand your specific goals and challenges, designing a tailored solution that aligns with your business objectives.
From the initial system sizing to council registration, installation, and maintenance, our engineers are there to guide you every step of the way, providing a hassle-free, turn-key energy solution.
Enjoy the versatility of systems that include solar, wind, battery, petrol/diesel generators, and even small-scale residential hydro turbine generators, all tailored to your specific needs.
Solar panels can significantly reduce electricity bills, with potential savings of 25 -100% depending on your energy usage, system size, and other practical considerations like available roof space, orientation of roof, and how much spade your roof is exposed to.
Solar panels require minimal maintenance, typically cleaning 1 – 2 times a year. Installations that are exposed to the elements and likely to pick up dirt easily will require more frequent cleaning. Examples include homes located close to the sea or in rural areas where the wind frequently blows dust on to the panels.
Batteries and inverters typically carry warranties of 10 years, depending on the brand. Solar panels have a 15 year product warranty and a 25 year linear output warranty. This means that after 20 years the panel should still deliver above 80% of its original production capability.
Solar panels can still generate electricity on cloudy days, though at a reduced capacity, and energy storage options like batteries can provide power during night time.
At Microgrid Energy we are committed to using top of the range equipment which is completely modular. This means you can expand on inverter capacity, battery capacity or solar panel capacity at any point and link it into the current system.
Yes, you can run any appliance on your solar system if your system is designed to run those appliances. This will typically affect your inverter and battery sizing.
Recent studies have shown that solar panels can increase your home value by up to 4%. Keep in mind that the size of your installation, the monthly savings on electricity costs and the percentage by which you are reliant on the grid can all play a role here.
The size, orientation and structural integrity of your roof will dictate how much solar power you can produce. Your roof should be able to carry the weight of the installed solar panels (12kg/m2) and have enough exposure to direct sunlight through the day.
We specialize in engineering the best solution for every energy need. Sustainability is the primary goal. We deliver solutions which are economically advantageous and up to the highest expectations of our customers.
It has been almost a year and a half since the Robben Island Solar Microgrid project was awarded to SOLA Build. After a thorough process of designing, planning and implementing, the project has been launched – and is a demonstration of how solar PV, combined with batteries, can make an excellent combination. This blog post describes just why the solar microgrid is so effective, and how the rest of South Africa can follow suit.
Many people know Robben Island for its reputation as the prison that held several high-profile political prisoners such as Walter Sisulu, Ahmed Kathrada and Nelson Mandela. Over the years, the island has also been a leper colony and a host site of WW2 garrisons. The island, therefore, has a rich political history – one which draws the thousands of tourists to its shores daily.
About Cape town microgrid operation
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