We've compared these UPS devices across many factors, like their size, power supply, runtime, and battery recharging time. This is where an uninterruptible power supply (UPS) comes into play. It can provide additional protection to your NAS and keep it running long enough to safely shut down. Not just for businesses, but for home users as well, who often have limited power setups such as houseboats, pop-up offices, and mobile homes. In this article, we'll cover the key reasons why a UPS is essential for your NAS, highlight the benefits for both personal and business use, and. When it comes to securing your Network Attached Storage (NAS) from power interruptions, investing in the right uninterruptible power supply (UPS) is crucial. Below is a summary of the top five UPS. The best UPS (uninterruptible power supply) devices on this page are important purchases for any business - or home user - who needs electronic devices such as PCs and servers that have constant power connections 24 hours a day, seven days a week. For 1–2 bay NAS devices, from 500-850VA should be enough (with desktop PC and router connected).