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CyberPower EC550G Ecologic UPS Battery Backup and Surge Protector | 8 Nema 5-15r Outlets with Eco-Mode Control, Simulated Sine Wave, Energy Star, 3-Year Warranty

CyberPower EC550G Ecologic UPS Battery Backup and Surge Protector

Bottom line: The CyberPower EC550G Ecologic UPS Battery Backup and Surge Protector: 8 NEMA 5-15R outlets: 4 battery backup + surge, 4 surge-only; main trade-off: simulated sine wave output, not pure sine; check your PSU's requirements.

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Pros & Cons

Pros

  • ✓ 8 NEMA 5-15R outlets: 4 battery backup + surge, 4 surge-only
  • ✓ ECO Mode cuts power to idle peripherals when your PC sleeps or shuts down
  • ✓ 3 ECO-controlled outlets for speakers, printers or lamps
  • ✓ Right-angle 45-degree offset plug sits flush in tight wall spots
  • ✓ Energy Star qualified, backed by a 3-year warranty

Cons

  • ✗ Simulated sine wave output, not pure sine; check your PSU's requirements
  • ✗ Only 4 of the 8 outlets get battery backup
  • ✗ ECO Mode only works with a USB connection to the computer
  • ✗ 5-foot input cord limits how far you can place it from the wall

Manufacturer description

The CyberPower EC550G Ecologic UPS is a compact standby battery backup and surge protector for a desktop PC, workstation, network gear, or home entertainment setup. It gives you eight NEMA 5-15R outlets in two groups. Four outlets have both battery backup and surge protection, so your computer and monitor stay running through short outages and you have time to save and shut down. The other four are surge-only outlets for peripherals that don't need backup power. The EC550G's standout feature is ECO Mode. Once you connect the UPS to your computer over USB, it can tell when the PC is off or…

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SpecPicks Verdict

SpecPicks scored CyberPower EC550G Ecologic UPS Battery Backup and Surge Protector using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies & cables category. Compare with similarly-priced alternatives in the power supplies & cables category before committing. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for power supplies & cables of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

How many outlets does the CyberPower EC550G have, and which ones have battery backup?

It has eight NEMA 5-15R outlets. Four have both battery backup and surge protection. The other four have surge protection only, and three of those are ECO-controlled.

How does ECO Mode on the EC550G work?

When the UPS detects that your computer is off or asleep, it turns off power to the peripherals plugged into the ECO Mode outlets. This needs a USB connection between the UPS and the computer.

Does the EC550G output a pure sine wave?

No. On battery power it outputs a simulated sine wave. If your power supply has specific waveform requirements, check the PSU manufacturer's guidance before buying.

How long is the power cord and what kind of plug does it use?

The input is a NEMA 5-15P plug on a five-foot cord. The plug is right-angled with a 45-degree offset, so it fits behind furniture and next to other plugs.

What warranty comes with the CyberPower EC550G?

The EC550G comes with a 3-year warranty. See CyberPower's documentation for full coverage terms and any connected-equipment guarantee details.

Key Features

  • EIGHT NEMA 5-15R OUTLETS: Four battery backup & surge protected outlets, Four surge protected outlets (Three ECO controlled); INPUT: NEMA 5-15P right angle, 45 degree offset plug with five foot power cord
  • ECO MODE: When the UPS detects a computer is off or in sleep mode, it will automatically turn off power to computer peripherals connected to ECO mode outlets, reducing power usage and lowering energy costs

Full Specifications

BrandCyberPower
ColorBlack
Weight550g
Runtime8 minutes
Voltage120 volts
Wattage330 watts
Amperage15 A
Unit Count1 Count
Form FactorCompact
Model NumberEC550G
Input Voltage120 volts
Maximum Power330 watts
Connector TypeNEMA
Output Voltage120 volts_of_alternating_current
Output Wattage330 watts
Frequency Range47 - 63 Hz
Item Dimensions10.6 x 5.9 x 3.1 inches
Mfr Part NumberEC550G
Power Plug TypeType C/EF - 2 pin (Europlug/FR-DE Hybrid)
Battery Cell TypeOther Than Listed
Full listing titleCyberPower EC550G Ecologic UPS Battery Backup and Surge Protector | 8 Nema 5-15r Outlets with Eco-Mode Control, Simulated Sine Wave, Energy Star, 3-Year Warranty

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CyberPower EC550G Ecologic UPS Battery Backup and Surge Protector | 8 Nema 5-15r Outlets with Eco-Mode Control, Simulated Sine Wave, Energy Star, 3-Year Warranty is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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CyberPower EC550G Ecologic UPS Battery Backup and Surge Protector | 8 Nema 5-15r Outlets with Eco-Mode Control, Simulated Sine Wave, Energy Star, 3-Year Warranty
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