CyberPower Standby Series 550 VA 330 Watts 8 Outlets UPS (CP550SLG)

Model Number: CP550SLG
Web Code: 10438181


CyberPower Standby Series 550VA 330W 8-Outlet UPS
SAVE $28$74.5
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CP550SLG | Standby UPS Series A compact UPS with standby topology, the Cyber Power Standby CP550SLG provides battery backup (using simulated sine wave output) and surge protection for desktop computers, workstations, networking devices, and home entertainment systems. During power interruptions, the CP550SLG offers reliable power protection and battery backup. Battery Backup Supplies power long enough for equipment to properly shut down when utility power fails. Helps prevent loss of data and minimizes the component stress caused by a hard shutdown. Surge Protection Diverts excess voltage away from sensitive electronic equipment during an AC power surge or power spike to prevent damage. Data Line Protection Prevents power surges that travel through telephone lines from causing damage to electronics. Standby Topology Ensures that when incoming power drops below or surges above safe voltage levels, the UPS switches to DC battery power and then inverts to AC power to run connected equipment. Simulated Sine Wave Output Uses pulse wave modulation to generate a stepped, approximated sine wave to supply cost-effective battery backup power for equipment that does not require sine wave output. Green Power UPS™ High-Efficiency Design Reduces power consumption by utilizing a compact charger and power inverter to create an ultra-efficient backup power system for home and office use. Ultra Quiet Design Minimizes noise during operation for a quieter work environment. Transformer-Spaced Outlets Accommodate large transformer-based plugs without compromising the access of other outlets. Specifications Capacity: 550 VA / 330 W Topology: Standby Waveform: Simulated Sine Wave Output: 120 VAC ± 5% Runtime (half/full): 8 minutes / 2 minutes Plug type & cord: NEMA 5-15P, 5 ft. cord Outlet types: 8 × NEMA 5-15R Total outlets: 8 (4 surge, 4 surge + battery backup) Transformer-spaced outlets: 4 Communication ports: USB Data line protection: Telephone Management software: Power Panel® Personal E

  • Working as anticipated!
    by Mike

    on November 10, 2019

    I have already experienced some brown-outs that this product got me through with no damage to equipment or data. I have a Sabrent external hard drive/memory device that had an old 1TB hard drive from an old HP desktop that died, and this old hard drive finally died from power black-outs/brown outs when my old CyberPower - Standby 450 VA desktop was fatally damaged from a near-by lightning strike that also took out an old TV. I am using the Sabrent for an old memory card that I had around and the CyberPower 550 is protecting both the Sabrent device and the memory storage card.

    Review originally posted on

  • Great product
    by PERKC

    on January 17, 2019

    I always depend on Cyberpower, they are great products at a good price.

    Review originally posted on

  • Largest number of outlets (8) available
    by justme

    on October 13, 2018

    Had one of these before and loved it so I purchased another one!

    Review originally posted on

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Shipping Cost

Shipping costs are dependent on your order and your shipping location. Add the product to your cart to get your shipping estimate.

Please allow 2 business days from the date of order for your product to ship.

**In the event that product is unavailable, you will be refunded within 48 business hours.

Large Item Scheduled Delivery (items heavier than 150lbs)

Delivery Method

Product will be delivered outside your home for all shipping areas.
Recycling of your old item(s) is not included with delivery.
Assembly of the delivered product is not included.

Shipping Restrictions

Seller does not ship to P.O. Boxes

Seller does not ship to the following provinces/territories:

  • Territories

Returns can be made within 14-30 days of receiving your order.

Mike’s Computer Shop Restocking Fees / Return Eligibility
Category Return Period Un-opened Opened/Unused Opened/Used
Laptops, Desktops, Tablets, iPads, Monitors & Printers, Cameras & Camcorders, Air Conditioners 14 Days 0% 10% 15%
Blank Media, Computer Components, Portable Storage, Batteries, Office Supplies, Ink & Toner, Bedding, Bath, Cleaning Supplies, Pet, Camera Lenses, Flash & Film, Musical Instrument consumables (guitar strings etc.), Wind Instruments, Headphones, Major Appliances, Jewelry 30 Days 0% Not Returnable Not Returnable
Furniture & Decor 30 Days 0% 10% Not Returnable
Cell Phones 15 Days 0% 10% 15%
All other product categories 30 Days 0% 10% 15%

All returned products must include original packaging.

Return shipping costs will be paid by the seller for all cases where the product is defective, damaged or incorrect. For other cases (e.g. you changed your mind), you will be responsible for this cost.

Seller Exceptions

We cannot accept the following returns on select health, safety and personal care items if opened:

3D Glasses

Apparel, Bedding & Linens

Baby & Juvenile Products


Beauty, Grooming & Personal Products

Blank Media (Digital Memory, Hard Drives, etc.)

Camera Lens and Flash

Child Safety (Gates, Car Seats, etc.)

Cleaning Supplies & Chemicals

Computer Components & Upgrades (Motherboards, Video Cards, Ram, Power Supplies, CPUs, etc.)

Drones & RC

Fitness Accessories & Equipment


Headphones & earphones (all types)


Major Appliances (Exchange only, can be open, but must be unused)

Musical Instruments Consumables

Office Supplies (Paper, Writing Instruments, etc.)

Office Supply Consumables (Ink, Toner, etc.)

Pet Supplies

Photo Film

Portable storage media and hardware

Projectors, and replacement projector bulbs (Lamps)

Safety Goods

Software & Entertainment Media (video games, CDs, DVDs)

Virtual Reality Headsets (Oculus Rift, PlayStation VR, etc.)

Wind Instruments such as Harmonicas

To request a return

Please contact the seller directly from your Order details page, and provide the following information:

  • Web ID (8-digit number) & product description
  • Number of items to be returned
  • Date you recieved your product
  • Condition of product
  • Condition of packaging
  • Reason for return

All refunds will be processed within 2 business days