A power failure is more than an inconvenience—it can knock out essential equipment for hours on end. If you have important electronics that have to keep running when the power''s out, you''ll need an uninterruptible power supply (UPS).
That''s where an uninterruptible power supply (UPS) comes in. Its main function is to act as a big battery that powers your devices when your electricity goes out. They range from small units that can sustain a few low-power devices to big house units for entire homes.
Battery capacity (usually denoted by the power rating in watts) should be the primary focus when getting a UPS. A sub-1000W UPS should be good enough for most appliances, but if you have really powerful systems like a gaming rig, you might want to look beyond the 1000W mark.
Once you''ve sorted the capacity, you need to evaluate the devices you''d be connecting to the UPS, specifically their sensitivity to signal fluctuations. Sensitive equipment like some newer LED TVs, CFL light bulbs, and audio equipment perform best on a pure sine wave. In this case, you''d need a UPS with a pure sine wave output. However, most other devices, including laptop computers, cell phone chargers, and any equipment that uses an AC/DC adapter, will usually work fine with a modified sine wave output.
You should also consider the UPS''s ability to protect your appliances. Most options come with built-in surge protection, so you can rest assured that sudden jolts of electricity won''t phase your connected devices.
But just as important is the presence of automatic voltage regulation (AVR) to keep your devices safe from minor power fluctuations throughout the day. The absence of AVR does not necessarily spell doom for your devices, but your UPS will have to kick in battery power more often, resulting in faster wear.
Size is another factor to consider when getting a UPS. More often than not, a higher capacity will translate to a bigger device. But factors like outlets and the presence of additional technologies play a role. That said, a larger device does not necessarily equal more ports.
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