CyberPower Standby UPS 900VA/500W Compact with USB Charging ST900U
The CyberPower ST900U Standby UPS delivers essential power protection for business-critical equipment, providing 900VA/500W of battery backup and surge suppression to maintain operational continuity during power events.
- Reliable Power Backup: Provides 900VA/500W of battery backup, ensuring critical systems like POS or network devices remain operational during short power outages.
- Surge Protection: Safeguards connected electronics from damaging voltage spikes and surges, extending equipment lifespan and preventing costly repairs.
- Graceful Shutdown: Features a USB port for connecting to a computer, enabling automated, safe system shutdowns to prevent data loss during extended power failures.
- Compact Design: Its compact form factor (309mm W x 177mm D x 78mm H) allows for flexible deployment in tight office spaces or under desks without obstructing workflows.
Product Overview
Product Overview
The CyberPower ST900U is a compact standby uninterruptible power supply system, delivering 900VA/500W of reliable battery backup and comprehensive surge protection for critical business electronics. It features 12 NEMA 5-15R outlets and two 2.1A USB charging ports.
Engineered for operational resilience, this UPS system ensures that essential network devices, workstations, or POS systems remain powered during outages, preventing data corruption and enabling controlled shutdowns to protect hardware and information.
- Core Functionality: Provides 900VA/500W of standby battery power, ensuring essential business operations continue uninterrupted during power fluctuations or brief outages.
- Data Integrity: Offers 7.5 minutes of backup runtime at half load, allowing ample time for users to save work and for IT systems to perform a graceful shutdown, preventing data loss.
- Equipment Protection: Includes robust surge protection and overload safeguards, shielding valuable electronics from damaging voltage spikes and current overloads, extending their operational life.
- Convenient Connectivity: Equipped with 12 NEMA 5-15R outlets for diverse equipment and two 2.1A USB Type-A ports for charging mobile devices, maintaining communication during power events.
- Operational Value: ENERGY STAR certified and RoHS compliant, this UPS reduces energy consumption and meets environmental standards, contributing to lower operating costs and corporate responsibility.
Deploy the CyberPower ST900U to secure your vital business equipment, ensuring continuous operation and protecting against the unpredictable nature of power events.
Technical Specifications
1Performance & Business Impact
2Connectivity & I/O
3Physical & Environmental
4Lifecycle, Warranty & Compliance
Full Specifications
Ports & interfaces6
Battery7
Features16
Weight & dimensions4
Design4
Certificates1
Packaging content2
Operational conditions1
Safety regulation & standards1
Sustainability1
What This Solves
Maintain Business Continuity During Outages
Unexpected power failures can disrupt operations, leading to lost productivity and potential data corruption. The CyberPower ST900U provides immediate battery backup, keeping essential workstations, network switches, and communication systems online.
Small business offices, retail locations, branch offices, administrative departments, remote work setups
Protect Sensitive Equipment from Surges
Voltage spikes and power surges can permanently damage expensive electronic equipment and corrupt critical data. This UPS offers robust surge protection, shielding connected devices from electrical disturbances.
Law firms, medical clinics, accounting practices, insurance agencies, any organization with sensitive IT assets
Enable Graceful System Shutdowns
Prolonged power outages require systems to be shut down safely to prevent hardware damage and data loss. The integrated USB port allows for automated, controlled shutdowns of connected computers, preserving system integrity.
Businesses without dedicated IT staff, offices with critical single-server deployments, remote offices, educational institutions
Key Features
900VA/500W Standby UPS
Ensures essential business equipment, such as POS systems or network devices, remains operational during brief power interruptions, preventing costly downtime.
12 NEMA 5-15R Outlets
Provides ample connectivity for multiple critical devices, consolidating power protection for an entire workstation or small network setup.
Surge Protection (Yes)
Safeguards valuable electronics from damaging voltage spikes, extending equipment lifespan and reducing the need for premature replacements.
2x USB Type-A Charging Ports (2.1A)
Allows employees to charge mobile devices during power outages, maintaining communication and productivity even when utility power is unavailable.
ENERGY STAR Certified
Reduces energy consumption and operating costs for businesses, contributing to a lower total cost of ownership and supporting environmental sustainability goals.
Industry Applications
Retail & Hospitality
Protects point-of-sale (POS) systems and network routers, ensuring transaction continuity and customer service during power fluctuations.
Legal & Professional Services
Safeguards critical workstations and network devices, preventing data loss and maintaining access to client files during unexpected power outages.
Healthcare & Life Sciences
Provides backup power for administrative workstations and small diagnostic equipment, ensuring patient data integrity and operational continuity in clinics.
Manufacturing & Industrial
Secures control panel workstations and small network hubs, preventing production interruptions and data corruption from unstable factory power.
Frequently Asked Questions
What type of equipment is best suited for the CyberPower ST900U?
The CyberPower ST900U is ideal for protecting individual workstations, desktop computers, network routers, modems, small switches, and point-of-sale (POS) systems in small to mid-sized business environments. Its 900VA/500W capacity is designed for these essential, non-critical loads.
How long will the ST900U power my devices during an outage?
At a half-load of 250W, the ST900U provides approximately 7.5 minutes of battery backup, allowing sufficient time for a graceful system shutdown. At full load (500W), it provides about 2 minutes of backup.
Can I connect this UPS to a computer for automatic shutdown?
Yes, the ST900U includes a USB port and a USB cable, allowing you to connect it to a computer. With CyberPower's PowerPanel Personal or Business Edition software, you can configure automatic, safe shutdowns during extended power outages.
Does this UPS provide pure sine wave output on battery?
No, the CyberPower ST900U uses a standby (offline) topology and produces a pseudo sine wave output when operating on battery power. This waveform is suitable for most common electronics and active PFC power supplies.
Warranty & Returns
Manufacturer Warranty
3 Years Limited
Warranty is provided directly by the manufacturer and covers defects in materials and workmanship under normal use.
Return Policy
Returns subject to manufacturer approval
Hardware returns are governed by the manufacturer's return policy. Some products are non-returnable or subject to restocking fees. Defective items are handled under the manufacturer warranty. Contact Zent Networks before initiating any return.