So you’re looking at buying a UPS. An uninterruptible power supply (UPS) provides emergency power by supplying power from a separate source when utility power is not available, typically for 5–15 minutes.
A UPS systems device can cost anywhere from $100 to over $20,000. A typical UPS for small business use costs $200. Some common UPS brands are APC, MGE, Upsonic Power, Belkin, Eaton and HP.
Key factors to consider when comparing a UPS are technology, power points, backup time and warranty. There are different UPS technologies available such as offline/standby, line-interactive, double-conversion, hybrid topology, DC power, rotary and capacitors. The more power points the better. Home users should look for a UPS with a VA rating of at least 500 to 700 VA. Most UPS devices have a backup time of 5-15 minutes. If the UPS is for business use then look for a longer warranty and a vendor that offers on-site warranty.
