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Backup Power and Surge Protection

Everything between the wall outlet and your equipment: UPS units, surge protectors, power strips, rackmount PDUs, inverters and batteries. 7,526 products from $1.99 to $41,516.99. RefurbUPS, PowerWarehouse, iTekiro and more.

7,526 products from $1.99

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Which power problem are you actually solving?

Start with the failure you want to survive. A surge protector absorbs voltage spikes and keeps gear alive, but when the power drops, everything switches off. A battery backup keeps equipment running for minutes so you can save work and shut down, and most models also add surge protection and voltage regulation. Look at uninterruptible power supplies when a sudden shutdown would cost you work, and at surge protector strips when you only need extra outlets with spike protection.

Other products solve narrower jobs. Rackmount PDUs distribute power inside equipment racks, DC-to-AC inverters make mains-style power from a vehicle or battery, and plain power strips add outlets with no protection at all. Replacement batteries keep an aging UPS useful. If you are unsure, a line-interactive UPS for the computer and a surge strip for the television is a common and sensible pairing.

Sizing the load before you pick a product

Every protection product has a ceiling. Add up the watts of what you will plug in, then compare the total with the device's watt rating, not only its VA figure. VA means volt-amps, and the watt number is lower, often by a third or more: a 1500 VA unit may be rated for 900 W. Leave headroom of roughly a fifth, because loads spike at startup, and keep laser printers and space heaters off a UPS.

Check the outlets and voltage too. Most small units use 120 V NEMA 5-15R outlets, while larger server-room gear may output 208 V or 230 V and need different plugs. Battery type affects upkeep: sealed lead-acid batteries are common and replaceable, while lithium-ion models last longer but cost more. Weight is a clue, since a unit of several dozen pounds holds a large battery and is meant for a rack or the floor.

Questions about Backup Power and Surge Protection

Do I need a UPS or a surge protector?
A surge protector stops voltage spikes, while a UPS adds a battery that carries the load through an outage. Choose a UPS for a computer with unsaved work, and a surge strip for televisions, chargers and lamps.
What is the difference between VA and watts?
VA is apparent power and watts is real power, and the watt figure is lower. The watt rating is the usable limit, so compare it with the total wattage of everything you plan to connect.
Can I plug a surge protector into a UPS?
Check the manual first. Most makers advise against plugging surge protectors or extension cords into a UPS, or a UPS into a power strip, because it can overload circuits and defeat the protection.