CyberPower ST900U Standby UPS - 900VA/500W Compact Battery Backup with 12 Outlets - 120V - PowerPanel Personal - $125K CEG
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Product Features
Product Overview
The CyberPower ST900U Standby UPS delivers reliable battery backup and surge protection for critical electronics in home offices, small businesses, and network environments. This 900VA/500W unit provides enough capacity to protect computers, networking equipment, VoIP systems, and entertainment centers during power disturbances. With its compact form factor and 12-outlet configuration, the ST900U offers practical protection without consuming excessive desk or floor space.
The unit features CyberPower's GreenPower UPS high-efficiency design, which reduces energy consumption and qualifies for ENERGY STAR certification. A $125,000 Connected Equipment Guarantee provides additional peace of mind against surge-related damage to connected devices. The ST900U employs standby topology with an 8ms transfer time, switching to battery power when input voltage falls outside acceptable ranges. Its simulated sine wave output is compatible with most modern electronics, including computers, monitors, and networking gear.
Power management is handled through CyberPower's PowerPanel Personal software, which provides automatic safe shutdown of connected computers, runtime estimation, and battery status monitoring via the USB interface. The sealed lead-acid battery (12V, 7200 mAh) is user-replaceable, extending the unit's service life. Environmental specifications support operation up to 10,000 feet elevation and storage up to 50,000 feet.
The ST900U combines essential UPS functionality with user-friendly features that enhance protection and usability. Its compact design (12.2" × 7" × 3.1") fits easily under desks or in tight spaces while providing substantial 900VA capacity. LED status indicators offer clear visual confirmation of power conditions and battery mode activation. The unit includes comprehensive protection features such as overload protection, circuit breaker, and 890-joule surge energy rating.
Technical Overview
The ST900U employs standby topology with an 8ms transfer time, switching to battery power when input voltage falls outside acceptable ranges. Its simulated sine wave output is compatible with most modern electronics, including computers, monitors, and networking gear. The unit includes comprehensive protection features such as overload protection, circuit breaker, and 890-joule surge energy rating.
Power management is handled through CyberPower's PowerPanel Personal software, which provides automatic safe shutdown of connected computers, runtime estimation, and battery status monitoring via the USB interface. The sealed lead-acid battery (12V, 7200 mAh) is user-replaceable, extending the unit's service life. Environmental specifications support operation up to 10,000 feet elevation and storage up to 50,000 feet.
Relevant product facts for this section include Plug/Connector Type: NEMA 5-15P, Receptacle Type: NEMA 5-15R,USB, Receptacle Detail: 12 x NEMA 5-15R,2 x USB, Load Capacity (VA): 900 VA. When those details are considered together, they give buyers a clearer picture of how the product is equipped, how it connects, and what kind of day-to-day role it is meant to support.
Key Product Advantages
The ST900U combines essential UPS functionality with user-friendly features that enhance protection and usability. Its compact design (12.2" × 7" × 3.1") fits easily under desks or in tight spaces while providing substantial 900VA capacity. LED status indicators offer clear visual confirmation of power conditions and battery mode activation.
Comprehensive Outlet Protection
Twelve NEMA 5-15R outlets provide flexible device connection, with six offering battery backup plus surge protection and six providing surge-only protection for less critical peripherals.
- 6 battery & surge outlets
- 6 surge-only outlets
- All outlets include surge suppression
Intelligent Power Management
USB connectivity enables communication with PowerPanel Personal software for automated system shutdown, runtime monitoring, and battery health management.
- USB HID compliant port
- PowerPanel Personal software included
- Automatic safe shutdown capability
Deployment / Use Cases
The ST900U is engineered for environments where reliable power is essential but space is limited. Its 900VA capacity supports typical desktop computing setups with sufficient runtime for orderly shutdowns during extended outages. The unit's simulated sine wave output ensures compatibility with active PFC power supplies found in modern computers and electronics.
For entertainment centers, the UPS protects televisions, gaming consoles, and audio equipment from voltage fluctuations and surges. The compact footprint allows discreet placement while the black finish blends with most home or office decor. With RoHS compliance and ENERGY STAR qualification, the ST900U meets environmental standards for responsible electronics.
Home Office & Small Business
Protect desktop computers, monitors, external storage, and networking equipment from power interruptions that could cause data loss or hardware damage.
- Desktop computer systems
- Network routers and switches
- External hard drives
Network & Communication Infrastructure
Ensure continuous operation of VoIP systems, modems, and network equipment during brief power outages to maintain connectivity.
- VoIP phones and adapters
- Cable/DSL modems
- Network switches and routers
Physical Profile
The ST900U features a compact tower design with dimensions of 12.2 inches wide, 7 inches deep, and 3.1 inches high. Weighing 7.7 pounds, the unit is portable enough for repositioning while stable enough to remain secure on desks or floors. The black finish provides a professional appearance suitable for office environments.
Front-panel LED indicators display power status and battery mode activation at a glance. The 5-foot power cord offers flexible placement options relative to wall outlets. The unit operates within a temperature range of 32°F to 104°F (0°C to 40°C) and humidity up to 95% non-condensing.
- Width
- 12.20" (309.88 mm)
- Depth
- 7" (177.80 mm)
- Height
- 3.10" (78.74 mm)
- Weight
- 7.70 lb (3492.66 g)
- Length
- 5 ft (1.52 m)
What's in the Box
The ST900U ships complete with all necessary components for immediate deployment.
Package contents include Standby ST900U 900VA Compact UPS User Manual USB A+B Type Cable, Standby ST900U 900VA Compact UPS. These included items support setup, installation, and immediate deployment without needing to source the core bundled accessories separately.
Highlights
- 900VA/500W standby UPS with compact design
- 12 total outlets (6 battery backup + 6 surge only)
- 120V input/output with simulated sine wave
- PowerPanel Personal software via USB interface
- 2 minutes runtime at full load, 7.5 minutes at half load
- ENERGY STAR qualified with GreenPower efficiency
- $125,000 Connected Equipment Guarantee
- 3-year limited warranty with user-replaceable battery
- EMI/RFI noise filtering and surge suppression
- Black finish with LED status indicators
Specifications
| Specifications | |
|---|---|
| Manufacturer | CyberPower Systems, Inc |
| Manufacturer Part Number | ST900U |
| Brand Name | CyberPower |
| Product Series | Standby UPS |
| Product Model | ST900U |
| Product Name | ST900U Standby UPS Systems |
| Product Type | Standby UPS |
| Technical Information | |
| Plug/Connector Type | NEMA 5-15P |
| Receptacle Type | NEMA 5-15R,USB |
| Receptacle Detail | 12 x NEMA 5-15R,2 x USB |
| Number of Battery & Surge Outlets | 6 |
| Number of Surge-only Outlets | 6 |
| Overload Protection | Yes |
| Cord Length | 5 ft (1.52 m) |
| Transfer Time | 8 ms |
| EMI/RFI Noise Filter | Yes |
| Energy Saving | GreenPower UPS™ High Efficiency |
| Application/Usage | Computer,Network,VoIP,Electronic Equipment,Entertainment Center,Router,Home/Office |
| Surge Suppression | Yes |
| Power Description | |
| Load Capacity (VA) | 900 VA |
| Load Capacity (Watt) | 500 W |
| Input Voltage | 120 V AC |
| Input Voltage Range | 96 V AC - 140 V AC |
| Output Voltage | 120 V AC |
| Input Frequency | 47 Hz,63 Hz |
| Output Frequency | 50 Hz,60 Hz |
| Waveform Type | Simulated Sine Wave |
| Surge Energy Rating | 890 J |
| Circuit Breaker | Yes |
| Output Power Factor | 0.6 |
| Management | |
| Alarm | Battery Mode |
| Controls/Indicators | |
| Status Indicators | LED Indicators: Power On |
| Interfaces/Ports | |
| Serial Port | No |
| USB | Yes |
| USB (HID Compliant) Port | Yes |
| Battery Information | |
| Number of Batteries | 1 |
| Battery Characteristics | Sealed |
| Battery Chemistry | Lead Acid |
| Battery Size | 12V |
| Battery Capacity | 7200 mAh |
| Backup/Run Time (Full Load) | 2 Minute |
| Backup/Run Time (Half Load) | 7.50 Minute |
| Hot Swappable | No |
| Typical Battery Recharge Time | 8 Hour |
| Replaceable Battery | Yes |
| Environmental Conditions | |
| Maximum Operating Elevation | 10000 ft (3048000 mm) |
| Maximum Storage Elevation | 50000 ft (15240000 mm) |
| Storage Temperature | 5°F (-15°C) - 113°F (45°C) |
| Operating Humidity | 0% - 95% |
| Minimum Operating Temperature | 32°F (0°C) |
| Maximum Operating Temperature | 104°F (40°C) |
| Physical Characteristics | |
| Product Color | Black |
| Height | 3.10" (78.74 mm) |
| Width | 12.20" (309.88 mm) |
| Depth | 7" (177.80 mm) |
| Form Factor | Compact |
| Weight (Approximate) | 7.70 lb (3492.66 g) |
| Miscellaneous | |
| Package Contents | Standby ST900U 900VA Compact UPS User Manual USB A+B Type Cable |
| Energy Star | Yes |
| Country of Origin | China |
| Environmentally Friendly | Yes |
| Environmental Compliance | Restriction of Hazardous Substances (RoHS) |
| Warranty | |
| Limited Warranty | 3 Year |
User Manual
FAQ
What is the power capacity of the CyberPower ST900U UPS?
The CyberPower ST900U provides 900VA/500W of backup power capacity. This rating supports typical desktop computers, monitors, networking equipment, and other electronics during power outages or voltage fluctuations.
How much runtime does this UPS provide during a power outage?
At full load (500W), the ST900U delivers approximately 2 minutes of battery runtime. At half load (250W), runtime extends to about 7.5 minutes, allowing sufficient time for orderly system shutdowns or brief power interruptions.
How many outlets does the ST900U have and what types are they?
The ST900U features 12 total NEMA 5-15R outlets. Six outlets provide both battery backup and surge protection for critical equipment, while six additional outlets offer surge-only protection for less essential peripherals.
What voltage does this UPS support for input and output?
The ST900U accepts 120V AC input with a range of 96-140V AC and delivers 120V AC output. This standard North American voltage makes it compatible with most home and office electronics without requiring voltage conversion.
Is the ST900U designed for rack or tower deployment?
The ST900U features a compact tower form factor designed for desktop or floor placement. Its dimensions of 12.2" W × 7" D × 3.1" H and 7.7 lb weight make it suitable for space-constrained environments rather than rack mounting.
What management and connectivity options does this UPS include?
The ST900U includes a USB (HID compliant) port for connectivity with CyberPower's PowerPanel Personal software. This enables automatic safe shutdown of connected computers, runtime monitoring, battery status alerts, and power management features.
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