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CyberPower ST900U Standby UPS Systems - 900VA/500W, 120 VAC, NEMA 5-15P, Compact, 12 Outlets, PowerPanel® Personal
- Capacity: 900 VA / 500 W
- Topology: Standby
- Waveform: Simulated Sine Wave
- Output: 120 VAC ± 5%
- Plug type & cord: NEMA 5-15P, 5 ft. cord
- Outlet types: 12 × NEMA 5-15R
- Communication ports: USB
- Management software: PowerPanel® Personal
- ENERGY STAR® qualified: Yes
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An essential safeguard for your sensitive electronics, the CyberPower ST900U Standby UPS offers a robust 900 VA / 500W power capacity, ensuring your devices remain operational and protected during power interruptions. This compact UPS system is engineered to deliver reliable battery backup, allowing for the safe closure of applications and preservation of data during unexpected power failures or blackouts. Equipped with 12 standard outlets, the ST900U provides full-time surge protection and battery backup, securing a wide array of devices against harmful voltage fluctuations, surges, and spikes that can occur during lightning storms or other power anomalies.
The inclusion of two USB Type-A charging ports, with a shared 2.1 amp output, enables rapid charging of USB-powered devices such as smartphones, tablets, and other portable electronics, enhancing its utility in a modern home or office setting. The ST900U features Standby Topology, which ensures that in the event of a power disruption, the UPS switches to battery power to keep your devices running smoothly. The Simulated Sine Wave Output delivers a stepped, approximated sine wave to provide cost-effective battery backup power for equipment that does not require pure sine wave output.
Designed with user convenience in mind, the ST900U boasts a sleek profile that integrates seamlessly into any workspace. Its quiet operation minimizes noise distractions, while the GreenPower UPS High-Efficiency Design works to reduce power consumption, contributing to a greener, more energy-efficient environment. For those who require software management, the ST900U comes with PowerPanel® Personal Software, available as a complimentary download. This intuitive software offers a user-friendly dashboard for easy control and monitoring of the UPS, ensuring you stay informed about the status of your power supply. The unit's transformer-spaced outlets accommodate larger transformer-based plugs without obstructing adjacent outlets, providing flexibility for connecting various types of equipment.
As an ENERGY STAR® qualified UPS system, the ST900U meets strict energy efficiency guidelines set by the U. S. Environmental Protection Agency, ensuring eco-friendly operation. CyberPower's commitment to quality is underscored by a generous $125, 000 lifetime connected equipment guarantee and a three-year warranty, offering peace of mind that your investment is protected. Trust in the CyberPower ST900U to deliver reliable, energy-efficient backup power and surge protection for your valuable electronics.
The inclusion of two USB Type-A charging ports, with a shared 2.1 amp output, enables rapid charging of USB-powered devices such as smartphones, tablets, and other portable electronics, enhancing its utility in a modern home or office setting. The ST900U features Standby Topology, which ensures that in the event of a power disruption, the UPS switches to battery power to keep your devices running smoothly. The Simulated Sine Wave Output delivers a stepped, approximated sine wave to provide cost-effective battery backup power for equipment that does not require pure sine wave output.
Designed with user convenience in mind, the ST900U boasts a sleek profile that integrates seamlessly into any workspace. Its quiet operation minimizes noise distractions, while the GreenPower UPS High-Efficiency Design works to reduce power consumption, contributing to a greener, more energy-efficient environment. For those who require software management, the ST900U comes with PowerPanel® Personal Software, available as a complimentary download. This intuitive software offers a user-friendly dashboard for easy control and monitoring of the UPS, ensuring you stay informed about the status of your power supply. The unit's transformer-spaced outlets accommodate larger transformer-based plugs without obstructing adjacent outlets, providing flexibility for connecting various types of equipment.
As an ENERGY STAR® qualified UPS system, the ST900U meets strict energy efficiency guidelines set by the U. S. Environmental Protection Agency, ensuring eco-friendly operation. CyberPower's commitment to quality is underscored by a generous $125, 000 lifetime connected equipment guarantee and a three-year warranty, offering peace of mind that your investment is protected. Trust in the CyberPower ST900U to deliver reliable, energy-efficient backup power and surge protection for your valuable electronics.
Warranty & Returns
Warranty, Returns, And Additional Information
Warranty
- Limited Warranty period (parts): 3 years
- Limited Warranty period (labor): 3 years
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Manufacturer Contact Info
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- Support Phone: 1-877-297-6937
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The CyberPower ST900U is a 900VA/500W standby UPS with 12 outlets, USB connectivity, and PowerPanel Personal software, suited to home-office users who want backup power and surge protection for a modest desktop setup during brief outages.
Recommended For
- Home-office users who want a short window to save work and shut down a modest desktop setup during an outage; check the computer’s power-supply compatibility and keep the total load within the UPS rating.
- Households that want battery backup for selected home-network equipment, such as a modem and router, through brief outages or long enough to shut equipment down safely.
- Users with several nearby electronics who want surge protection for multiple devices and battery backup for the equipment they prioritize; only six of the ST900U’s 12 outlets provide battery backup.
- People who want USB-connected power monitoring and shutdown support for a compatible home computer, using CyberPower PowerPanel Personal software.
Spec Summary
| Attribute | Value |
|---|---|
| Best For | Home or office electronics needing surge protection and short battery backup, with up to 500 W of connected load |
| Capacity And Output | 900 VA / 500 W capacity with 120V AC output and simulated sine wave; output frequency is 50/60 Hz ±1% |
| Input And Connectivity | Accepts 96–140V AC at 47–63 Hz; connects through a NEMA 5-15P plug with a 5 ft. cord and includes USB communication for PowerPanel Personal management |
| Outlets And Surge Protection | 12 NEMA 5-15R outlets, including transformer-spaced outlets; 890 joules of surge protection with internal circuitry limiting and a circuit breaker |
| Battery Backup | Sealed lead-acid battery with 7.5 minutes of runtime at half load and 2 minutes at full load; recharges in 8 hours, with a stated average battery life of 3 years and on-battery, low-battery, overload, and fault alarms |
| Design And Dimensions | Compact black plastic enclosure measuring 12.20 × 7.00 × 3.10 in. and weighing 7.70 lb. |
| Efficiency And Compliance | ENERGY STAR qualified with GreenPower high-efficiency design; approvals and compliance include UL1778, cUL, FCC DOC Class B, CEC, and RoHS |
| California Proposition 65 | Warning identifies styrene and bisphenol A (BPA) |
| Included Items | UPS system, user manual, and USB A+B type cable |
| Model Identifiers | CyberPower Standby UPS Series, model ST900U |









































