![]() ![]() In the past, a UPS was there to cater for bad power, switching spikes and short power failures. What is the difference between short run-time and long run-time? This includes a growing list of some well-known chain store outlets and retailers, selling cheap Chinese imports at excessively high prices with no local after-sales support and repairs. Many a user has been caught out in the long term with a product that they can’t be repaired. There are many cheaper products other than the real brand names like AROS and RIELLO from Standby Systems in Africa. It is essential when buying a UPS system that you purchase from a well-known outlet that has been in the UPS business for decades and knows the market, the products, and their areas of use as well as possessing the technical expertise and personnel to repair these products in years to come. The familiar words “ uneconomical to repair” are a popular excuse by the sellers of these systems, when, in fact, it should mean “ unable to repair.” Many a UPS user has purchased his dream backup system to cater for rolling blackouts only to find out in a year or two that the supplier either no longer exists or doesn’t have the spare parts and technical ability to repair the system. In South Africa, the typical household language at braais and functions is:Īlthough the choice of available backup power product is very vast, when you consider purchasing a UPS system, you should also look at the availability of African based spare parts and technical knowledge. It’s because of startup current that the UPS inverter is often only running at below 50% of its rated power capacity because it is sized to cater for the startup currents when those types of loads are connected to its inverter output, even your PC does this! Where can I buy my UPS System? The inverter could blow up, and it will probably not be able to supply the startup current under power failure conditions, meaning the whole load will be dropped and go off. Why is calculating the startup current important?Ĭatering for the startup current is essential when sizing a UPS otherwise, it will keep beeping UPS inverter alarms on every startup, and keep going on to UPS bypass. The current power drawn from the UPS inverter while the load is running is called running current (Power).Įven your home PC when it starts up, will draw power of about 300 watts which will then drop to about 100 watts in a few seconds. ![]() This is called the startup current, and it is vital to take this into account when sizing a UPS. This is because when a motor or pump starts, it does not have what is called a soft start so the supply to it has to provide up to ten times more power to start than when it is running. If you want to put any device on the UPS inverter that uses a motor or pump, you need to consult with your Standby Systems specialist so that it can be calculated into your inverter sizing. Only put on your UPS sizing list critical items like electronics, PC’s, home and office audio visual equipment and screens and maybe a few LED lights for safety both at home and in the workplace. When looking for a UPS system to backup your house, office or factory, you need to consider only the most essential items to put on it to keep your UPS inverter size as small as possible and hence the purchase price as low as possible.įirstly do NOT add things like air conditioners, washing machines, pool pumps, hairdryers, fridges, stoves and all other heating and cooling devices.Ī short and simple rule is that anything for heating or cooling either goes on to a generator backup or you use the sun or gas, for instance, the sun to heat water and gas to cook or heat your home and office. Yes, you can, but it isn’t cheap when it comes to repetitive daily power failures and thus not always the best option to use a UPS on its own.Ī UPS can supply ANY load if it is sized correctly however, it comes with a price tag and a backup battery that requires replacement every few year depending on use and number of discharges. ![]()
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