A backup power supply is an important installation with the function of providing power until the event of a power failure in its original source. It ensures that electrical equipment and systems are still in operation when there is no electricity for long enough to save the programs or data being handled on them from loss by outages or damage if not carefully shut down beforehand. Back-up systems often have a variety of technical features, such as automatic voltage regulation. This makes sure that power flows smoothly without interruption, and surge protection. This keeps electronics from being fried by dangerous spikes of electricity. They often come with an inverter that converts the DC power they provide into AC power. This allows them to be used in all sorts of applications, from residential homes to factories and other commercial settings. In short, whether the sun shines or not, we who live in this modern age need electricity all the time. That makes backup power supplies absolutely indispensable things for us!