Tag: solar

Source: Supermarket & Retailer

Johannesburg and Cape Town, which have a combined population of about 10 million people, plan to diversify away from the electricity produced mainly from coal by Eskom Holdings SOC Ltd to more sustainable sources such as solar and power generated from landfill gas.

“The City is looking at 300 megawatts of renewable” energy, Kadri Nassiep, Cape Town’s executive director for energy and climate change, said by email. “If all clarity is obtained and plans forge ahead, we could start seeing greater diversification of our energy resources as a city in about three to five years time.”

In addition to improving security of supply, the move will allow the cities to boost their fight against climate change by using power that doesn’t result in the emission of greenhouse gases. Still, it will slash revenue for Eskom, which is struggling to service a $30 billion debt bill.

“Internationally many cities are at the forefront of dealing with climate-change disasters and so have adopted proactive climate-change responses,” Lauren Hermanus, director of Adapt, a South African company that provides consultancy services on sustainable energy, said in an interview.

“We are also all aware of Eskom’s related operational, governance and fiscal challenges, most clear in our bouts of load shedding,” she said, using a local term for power outages.

Landfill gas

South Africa produces the same quantity of greenhouse gases as the UK, which has an economy eight times larger. Eskom, which runs a fleet of coal-fired power plants, is the country’s worst polluter, accounting for about 40% of the greenhouse-gas emissions.

Cape Town plans to build a photovoltaic solar power plant by the end of the 2023 financial year, as well as sourcing additional sustainable energy, Nassiep said. The city took the energy ministry to court this year to win the right to source its own power. The judge ruled that further negotiations with the government should take place.

“We intend putting out a tender for renewable-energy plants embedded in our grid in the next year and we would like to source renewable energy from large independent power producers as soon as is feasible,” he said.

Johannesburg, South Africa’s biggest city and financial hub, is considering sourcing power from solar plants and landfills, where gas from rotting garbage can be used to produce electricity.

The initiative is driven mainly by Eskom’s unreliability, the city’s commitment to reduce carbon emissions and the need to protect customers from rising power prices, said Isaac Mangena, a spokesman for Johannesburg’s City Power utility.

“City Power is still at early stages of the initiative and we expect the process to take at least 2 years,” he said.

Like a seriously unwelcome – but all-too-familiar – guest, loadshedding has returned.

To help South Africans get through the powerless days and dark nights, Orlando Luis, CEO of Brights Hardware, shares a list of eight must-have items that will keep your home (and office spaces) functional during a power outage.

Battery-powered LED lighting

“Battery-powered LED lighting is essential during power outages,” says Luis. “There is a wide range of rechargeable LED light strips, lanterns, and torches available that make keeping the lights on during loadshedding easy. You can even get a rechargeable LED desk lamp so that the kids can continue doing their homework during evening power cuts.”

Another great item to have in the home are intelligent LED light bulbs. These bulbs come in either a screw or bayonet configuration and can be used like a standard light bulb in any light fixture but they stay on during load-shedding as they hold charge for up to four hours.

Solar lighting

In addition to rechargeable and battery operated solutions, there is a wide range of solar powered lighting on the market today. These range from spot lights/security lights to solar lanterns, garden lighting and even pool lights.

“Solar powered lighting is a great solution in a sun-rich country such as ours,” advises Luis “There is no cost to recharge them, and many are practically “set and forget” and will come on automatically after sun down.”

Gas stove/cooker

Boiling water and getting meals prepared during power outages is impossible without a gas stove or cooker. Thankfully there are many different options available to consumers today – whether it is a large six plate gas hob and oven or just a simple, portable table-top one or two-plate gas cooker – and many more options in between.

“Many people are choosing to change their ovens over from electrical to gas. Not only does this mean you can carry on your dinner preparations during a power outage, but your electricity bill will also be reduced through the introduction of gas appliances,” says Luis.

Portable power bank

We all want to stay connected, especially in the dark. No electricity coupled with no means of communication is not a great combination.

“Portable power banks are a fantastic solution to ensure that you don’t run out of cell phone battery life,” advises Luis. “These compact gadgets can also charge other devices such as tablets, portable modems and speakers.”

Surge protector

It is a good idea to purchase a surge protector for your home or office. A surge protector is an electrical device that is used to protect equipment against power surges and voltage spikes that can be caused by power cuts.

“Surge protection can range from plug and play devices to systems installed at the distribution board by a registered electrician.”

Luis goes on to caution that some household insurance policies stipulate that they will not cover damage caused through power surges if the proper surge protection is not in place – “it is worth checking with your insurance provider.”

Uninterruptible power supply (UPS)

An uninterruptible power supply (UPS) is an electrical apparatus that provides emergency power. A UPS differs from a generator in that it will provide near-instantaneous protection from power interruptions by supplying energy stored in batteries. It is a type of continual power system.

“A UPS is typically used to protect hardware such as computers, data centers, telecommunication equipment or other electrical equipment where an unexpected power disruption could cause injuries, fatalities, serious business disruption or data loss.”

Generator

If budget allows, investing in a generator is a great way to make power outages less intrusive. “There are many different models and options to consider,” says Luis. “Entry level 2 stroke generators, such as a 950-watt unit, are unreliable if the petrol/oil mixture is not consistent, so Brights recommends starting with no lower than a 4 stroke 1200-watt generator.”

Inverters

This then introduces the question – what about people who live in complexes and housing estates that are not allowed to run a generator because of the noise pollution?

Luis says that the best option here is to purchase a pure sine wave inverter with batteries. All these units are silent except for the cooling fan which blows on the side. They also switch on automatically during load shedding.

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