CyberPower ST900U 900VA Standby UPS System – 500W NEMA 5-15P 12 Outlets


Keep your sensitive devices powered with a backup of up to 2 minute at full load. Capacity: 900 VA / 500 W. Topology: Standby. Waveform: Simulated Sine Wave. Output: 120 VAC ± 5%. Outlet types: 12 × NEMA 5-15R. Communication ports: USB. Management software: PowerPanel® Personal. ENERGY STAR® qualified: Yes. Warranty: 3 year.

SKU: ST900U Categories: , , Brand: Cyber Power


The CyberPower ST900U 900VA Standby UPS System provides battery backup and surge protection for lightning-induced surges and other power events that can damage electronic equipment. It has enough battery backup to power electronics through power failure. And, it has enough runtime to perform a graceful shutdown to protect against the loss of data and damage during longer outages.

The ST900U has two USB ports with 2.1 amp shared total output. This gives you a faster charging time. It’s designed to reduce noise for a quieter work environment and to run efficiently to reduce power usage. With its’ sleek design, this UPS is perfect for all your home office and entertainment needs, including computers, gaming consoles, and broadband routers.

With a $125,000 lifetime connected equipment guarantee and a three-year warranty, you can trust CyberPower’s commitment to the quality of this Battery Backup with Surge Protection.


CyberPower UPS Systems is a popular US manufacturer of uninterruptible power supplies, surge protectors and other backup power solutions. Some of its more popular products are the affordable line-interactive UPS devices.

CyberPower also manufactures home office and professional grade UPS systems, PDUs, surge protectors, mobile chargers and connectivity products. They range from consumer grade to IT professional and enterprise. They’re very intent to providing a full range of power management products and solutions. The mission of CyberPower UPS is to help you power, monitor and protect critical equipment and data.

Wherever you are, whenever you need power, CyberPower has got you. They offer a huge line of accessories that charge, split, convert, and adapt power to fit your needs.

We are thrilled to be working with them, and are ready to answer your questions and save you money on your next CyberPower purchase, so reach out to us, or call Corporate Armor at 877-449-0458. We can’t wait to serve you!


CyberPower ST900U 900VA Standby UPS System

  • Two USB ports with 2.1 amp shared total output
  • Reduced noise for a quieter work
  • $125,000 lifetime connected equipment guarantee





Additional information

Weight 10.78 lbs
Dimensions 7.00 × 12.20 × 3.10 in
Application/Usage Computer, Network, VoIP, Electronic Equipment, Entertainment Center, Router, Home/Office
Battery Chemistry Lead Acid
Package Contents Standby ST900U 900VA Compact UPS, User Manual, USB A+B Type Cable,
Product Type Standby UPS
Hot Swappable No
Input Voltage 120 V AC
Manufacturer Part Number ST900U
Manufacturer Website Address
Limited Warranty 3 Year
Output Voltage 120 V AC
Form Factor Compact
Load Capacity 900 VA/500 W
Manufacturer CyberPower Systems, Inc
Product Model ST900U
Product Name Standby ST900U 900VA Compact UPS
Waveform Type Simulated Sine Wave
Product Series Standby UPS
Brand Name CyberPower
Plug/Connector Type NEMA 5-15P
Input Voltage Range 96 V AC - 140 V AC
Country of Origin China
Receptacle Type NEMA 5-15R, USB
Environmentally Friendly Yes
Environmental Certification RoHS, GreenPower UPS
Backup/Run Time (Half Load) 7.50 Minute
Backup/Run Time (Full Load) 2 Minute
Replaceable Battery Yes
Energy Star Yes
Number of Battery & Surge Outlets 6
Number of Surge-only Outlets 6
Transfer Time 8 ms
Typical Battery Recharge Time 8 Hour
Product Color Black
Receptacle Detail 12 x NEMA 5-15R, 2 x USB
Additional Information Replacement Battery Cartridge : TBD, Circuit Breaker : 15 A, Cord Length (ft) : 5 , Outlets - Widely Spaced : 4, Overload Protection : Internal circuitry limiting / circuit breaker, Rated Power Factor : 0.56, Multifunction LCD Panel : No, Software : PowerPanel® Personal Edition, Keyhole Mounting Slots : Yes, Operating Relative Humidity : 0 - 95% (non-condensing), Operating Temperature : 32 °F to 104°F (0°C to 40°C), Connected Equipment Guarantee : Lifetime,
Certifications & Standards UL1778, cUL, FCC DOC Class B, CEC,
Status Indicators <b>LED Indicators:</b> Power On
Overload Protection Yes
Surge Energy Rating 890 J
Output Frequency 60 Hz
Alarm On Battery, Low Battery, Overload, Fault
Input Frequency 63 Hz
Battery Size 12V
Battery Capacity 7200 mAh
Maximum Operating Temperature 104&deg;F (40&deg;C)
Serial Port No
Number of Batteries 1
Battery Characteristics Sealed
EMI/RFI Noise Filter Yes
Directly Connected Equipment Guarantee $125000
Energy Saving GreenPower UPS&trade; High Efficiency
USB (HID Compliant) Port Yes
Maximum Operating Elevation 9842.52 ft
Maximum Storage Elevation 49212.60 ft
Storage Temperature 5&deg;F (-15&deg;C) - 113&deg;F (45&deg;C)
GTIN 0649532621521
UPC 649532621521
EAN 0649532621521
UNSPSC 39121011