![]() ![]() This table lists a few typical household items and their power consumption. For example, old incandescent lights use ten times more energy than LED lights do. Lights? Your washing machine? The stove and electric kettle? Then you need to make sure they are as energy efficient as possible before you size the backup system. To reduce both the upfront capital cost and operational expenditure, you need to decide what is essential. The inverter must be able to carry the sum of all the loads that are drawing power at any instant in time and the battery must be able to supply the energy required. This purchase should be a long term investment. To extract the maximum power from the solar panels, be sure to get one that has maximum power point tracking (MPPT). You want a hybrid inverter that can connect to the grid, battery backup, and to solar panels. We recommend a hybrid inverter, which can be grid-tied to augment supply and seamlessly continue operation as an off-grid solution during loadshedding. Suranto W/Shutterstock/Editorial use only It’s an electronic device that changes direct current (like energy stored in a battery) into alternating current (power for your home).Īn inverter system will look something like this. ![]() This is a key component of any alternative power system. Our full and detailed instructions for designing a loadshedding system are available here. ![]() So, we’re able to answer a few questions for those who feel overwhelmed by the options. The way the charger is designed resembles the sort of system needed for domestic power cut solutions. We are electrical engineers who are working on a standalone charger for small electric vehicles with the South African National Energy Development Institute as part of the Long-Term Joint European Union - African Union Research and Innovation Partnership on Renewable Energy. There’s a bewildering array of jargon to sift through and many elements to consider, from the right kind of inverter to the size of your solar panels. This reality, and President Cyril Ramaphosa’s announcement during his annual state of the nation speech on 9 February 2023 that tax incentives for solar power use are imminent, mean that many people are considering alternative electricity supply systems for their homes.īut deciding on the best system isn’t a simple matter. South Africa’s electricity utility Eskom has made it clear that “loadshedding” – rolling scheduled power cuts – isn’t going to end any time soon. ![]()
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