Category Archives: Solar Water Heating

With Yes Solar your solar geyser will pay for itself!

“Last year I installed those solar panels in my house for the geyser, that energy-efficient kind. Today, I got a call from the contractor who installed it. He complained that the work had been completed a year ago and I still hadn’t paid for them. Hellooo … just because I’m blonde doesn’t mean that I am automatically stupid. So, I told him 

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Subsidies vir sonkraggeisers droop op!

Die installering van laedruk-sonkraggeisers in die Baai is voorlopig gestaak omdat Eskom se subsidies daarvoor opgedroog het. Die sondraggeisers is n Eskom-projek en word deur hom gefinansier. Sowat 30 586 geisers is al by regeringshuise hier aangebring. George Ferreira, van die maatskappy wat die geisers installeer, het gesê hulle het al 120 000 huishoudings voorsien. Ferreira het op n onlangse komiteevergadering oor infrastruktuur, ingenieurswese en energie gesê die projek is gestaak weens geldnood en hy weet nie wannneer dit hervat sal word nie. Volgens Mnr. Ferreira spaar huiseienaars  maandeliks sowat R30 aan krag met laedruk- sonkrag-geisers. Hulle het egter heelwat probleme ondervind tydens die installering. “Talle huiseienaars wat by hul huise laat aanbou het se dakke voldoen nie aan die standaarde nie en ons kon nie installasies doen nie. Ons het ook enkele lekke ondervind omdat vullertenks wat plaaslik vervaardig en SABS-goedgekeur is, foutief was. Ons moes 6000 van die vullertenks vervang. Sommige foutiewe krane is vervang. Van die geysers wat verkeerd geïnstalleer is, het van huiseienaars se dakke afgewaai.” Dié probleme het veroorsaak dat die maatskappy nie soveel wins gemaak het as wat hy aanvanklik bereken het nie. Helga van Staaden – PE Express, 21 September 2011

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Interesting Facts about Electricity

A spark of static electricity can measure up to three thousand (3,000) volts. A bolt of lightning can measure up to three million (3,000,000) volts – and it lasts less than one second! Electricity always tries to find the easiest path to the ground. Electricity can be made from wind, water, the sun and even animal manure. Burning coal is the most common way electricity is made in the United States. The first power plant – owned by Thomas Edison – opened in New York City in 1882. Thomas Edison invented more than 2,000 new products, including almost everything needed for us to use electricity in our homes: switches, fuses, sockets and meters. Benjamin Franklin didn’t discover electricity – but he did prove that lightning is a form of electrical energy. One power plant can produce enough electricity for 180,000 homes. Alternative Energy The bicycle is the most efficient form of transportation known. It uses five times less energy than walking. B.C.’s forest industry obtains 25% of its electricity from biomass — in this case, the waste material from their own industry. A system of distribution and transmission lines brings electricity to southern Manitoba through 70,000 km of lines. That’s … Continue reading

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Fascinating Facts about Energy

Science Energy cannot be created or destroyed. It can only be converted from one form to another. Find an elastic band, and stretch it out. The stretched rubber band has potential energy. If you let it go, it moves and has kinetic energy. Have you ever wondered how you might get a hot air balloon to float up and down? How would you launch it? How would you get it back to earth? The balloon rises by warming up the air inside it. It descends by letting the air inside it cool down. It all works because of heat energy. Electricity travels at 300,000 km/sec. If you travelled that fast, you could travel around the world eight times in the time it takes to turn on a light switch. The energy produced by the atom-splitting of one kilogram of uranium is equivalent to the burning of 1.3 million kilograms of coal or 1.35 million litres of oil. People run on energy too, and food is our fuel. The unit we use to measure expended heat energy is the calorie. Calorie expenditures comparison: Lying at ease – 1.5 cal/min Tennis – 7 cal/min Playing drums – 4–6 cal/min Golfing – 6 … Continue reading

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Interesting Facts about Electricity

History The first windmills were developed in Persia in about 600 B.C. About 200 years ago, Alessandro Volta discovered that when two strips of different metals were put in a sulphuric acid solution and connected with a wire, electricity began to flow. Voila! The first electric battery was developed! Think of him the next time you pick up your battery-operated CD player or Game Boy. In 1879, just over 100 years ago, Thomas Edison invented the first light bulb. (Thomas Edison didn’t invent the first light bulb – but he did invent one that stayed lit for more than a few seconds. Think of the incredible changes it has brought to our current world! The first windmill to produce electricity was in Denmark in 1890. In the past, frightened sailors voyaging at night saw ghostly phantoms of bluish light dancing on the masts of ships. Called Saint Elmo’s fire, the light is actually a form of static electricity. In 1986, an accident at Chernobyl, USSR, sent radioactive material into the atmosphere and raised concerns about the production and storage of radioactive waste. What is a kilowatt hour? When we buy petrol, we’re charged per litre. When we buy electricity, we’re … Continue reading

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Ways to reduce your electricity bill Step three:

Get a geyser blanket The exact savings are hard to predict, but fitting a geyser blanket around your geyser and insulating your hot water pipes is recommended, says Palmer, as these prevent heat loss when the geyser is switched off. Geyser blankets range in price from R90 to R400 – only buy those that are SABS-approved, Eskom-endorsed and flameproof. DIY kits are available but it’s easiest to ask a plumber to install the blanket, at a cost of roughly R250–R450 per hour (it shouldn’t take longer than an hour). For more information, go to www.eskomdsm.co.za.

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Benefit from SWH Rebates while you can

Eskom generates about 95 percent of the electricity used in South Africa. The company has been battling with electricity shortage since January 2008, but its problems date a decade earlier and are due to lack of investment in new capacities and in updating the existing power stations. Last year, Eskom increased its tariffs by 31 percent and asked for 35 to 45 percent annual increases for three years in order to scrape together about R400 billion needed to build new power plants. However, in February 2010 the National Energy Regulator of South Africa (Nersa) approved lower increases: 24.8 percent for 2010/11 financial year, which will bring the average Eskom electricity price to 41.31c per kWh; 25.8 percent for 2011/12, bringing the average Eskom electricity price 51.68 c per kWh; and 25.9 percent in 2012/13, making the average Eskom electricity price 65.06c per kWh. Eskom will use part of the money it gets from the higher rates towards increasing its solar water geyser subsidies, from about R2,500 to about R7,000. The cost of subsidizing solar geysers is lower than the cost of building a new power station. With the new subsidy in place, almost half of the cost of a solar … Continue reading

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50% Renewable energy by 2030 for South Africa – WWF

One-half of South Africa’s electricity generation could come from renewable energy sources by 2030, the World Wide Fund for Nature (WWF) said in a new report on Tuesday, 10 August 2010. “Renewable energy is not just an environmental issue anymore. It is about assessing the health of our economy going forward,” said WWF climate change programme manager Richard Worthington. He said that reaching the 50% renewable energy target by 2030 was distinctly feasible, despite the country’s heavy reliance on coal to produce electricity, and added that it was necessary to ensure low-carbon re-industrialization, which would be required under emission reduction commitments in the climate change arena. The report, entitled ‘Renewable energy in a just transition to sustainable electricity supply’, argued that South Africa had the potential to rapidly upscale its use of renewable energy, and with a combination of energy-efficiency measures, this would result in cheaper electricity over the medium term. The report also introduced the sustainable national accessible power planning (Snapp) tool, which was commissioned by the WWF, and was freely available on the Internet. The Snapp tool allowed for interrogation of government’s proposed energy plan, and allowed for the modeling of different energy scenarios, depending on the different inputs made. … Continue reading

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Why Solar Energy in South Africa?

There are 5 Good reasons to use solar energy in South Africa: Power Shortage: South Africa cannot meet the energy demand in the country only with existing power generation capacity. South Africa must safe 10% on its electricity bill. Former finance Minister Trevor Manuel announced various steps and measures in his February 2008 budget speech which includes: ¨       Levy on electricity generated from non-renewable sources, such as generators. ¨       Promised to consider tax incentives for clean energy. ¨       Tax relief for generation of electricity from amongst others sunlight. Eskom has announced delays in quoting and perhaps supplying only part or none of the electricity requirements for new developments and requirements for permits. 2.    Rising Energy Cost: Electricity costs are very low in SA, but Eskom forces a 25% price increase per annum over the next four years. Diesel price increased more than 200% in the last 4 years and will continue to do so for the unforeseeable future. (Source: Stats AS 2007) 3.    Independence from providers: Solar energy ensures continued power supply on key appliances at home or in the office, thereby mitigating damage during power surges and outages. It reduces the household reliance on Main Grid Energy … Continue reading

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Solar Water Heating

People have been using solar power for many years to heat up their water, light up their homes and for general low-voltage appliances. Solar power energy is now more easily accessible to the public than ever before, and millions of people around the world are installing solar geysers in their homes in order to save money on electricity consumption and thus helping the planet. Converting your home to use solar power can be a considerable undertaking, but the results are very rewarding. Going solar is a growing trend, but where do you begin the process? Solar power systems use energy from the sun – which is an unlimited source of renewable energy – and convert it into electricity or heat. The most practical place to start the process of conversion is with the installation of solar geysers on your roof. Solar water heaters use a roof-mounted, heat-absorbing panels (thermal collectors) to heat water with the power of the sun. The heated water is fed into a special solar geyser that stores the water. Firstly, you should find the most appropriate position suitable on your roof. The solar panels should not be shaded either by trees or any other obstacles. Even if … Continue reading

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