![]() ![]() The standby UPS has trouble handling these sort of interruptions because they must repeatedly switch back and forth between AC and battery power with each dip. ![]() Interesting fact: The vast majority of power interruptions aren’t blackouts as we’ve come to expect…īut rather, brownouts, which are momentary sags or dips, in power. So for the vast-majority of people, I recommend this UPS design instead… Line-Interactive UPS: the Best Value of the 3 Designs A typical online UPS may cost several thousand dollars, way beyond the budget of average consumers. However…to increase energy efficiency, a similar online method known as delta conversion also exists…which delivers a portion of the power directly to the computer, rather than through the battery.Īs you might expect, all this technology doesn’t come cheap. The only downside of this method is that it consumes far more energy than a typical standby UPS. Power to your computer stays perfectly clean and stable, because the output is always regulated by the battery.During a blackout, there is absolutely ZERO power interruption, because the computer is already running on battery power.So unlike the standby UPS which engages only when there’s a problem…the online UPS continuously filters power through the battery before sending it to your computer. It takes the DC power from the battery and converts back to AC, which is used to power your computer.It takes AC power from the wall, and converts it to DC to charge the battery.To supply truly uninterruptible backup power during blackouts, they use what’s known as the double-conversion method, which works like this: While once used only for ultra-expensive commercial operations, recent technology has made them somewhat affordable for consumer-use as well. ![]() The best and most-expensive of the 3 designs is the online UPS ( aka true UPS). Now here’s how each one works: Offline/Standby UPS: For Normal Desktop Computers There are 3 levels of UPS protection to choose from: Otherwise, let’s continue… The 3 Levels of Uniterruptible Power Supplies
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