Description
APC Back-UPS 900 VA UPS Battery Backup 120V 900W No Battery BK900
This is an uninterruptible power supply (UPS) designed to provide temporary battery backup power during utility outages. The unit supplies 630 watts of continuous power at 120V AC output and includes six NEMA 5-15R outlets with surge and battery protection.
Specifications & What's Included
- 900 VA / 630 W capacity
- Input: 120V AC, 60Hz at 12A max
- Output: 120V AC, 60Hz at 7.5A max
- 6 x NEMA 5-15R outlets (battery + surge protected)
- Requires 2x 12V 8Ah SLA batteries (not included; e.g., Universal Power UB1280)
- DB9 serial port for monitoring
- Fuse-protected overload protection and site wiring fault indicator
- Tower/desktop form factor
- Battery connector pigtail included
Applications
Back-UPS units are used to protect computer workstations, servers, and networking equipment during power disruptions. They maintain system operation long enough for graceful shutdown or to bridge brief outages. This 900 VA model supports typical office and lab computer setups. Commonly deployed in IT environments, telecom facilities, and data centers requiring power continuity for critical devices.
This APC Back-UPS 900 (BK900) uninterruptible power supply has been inspected and appears to be in good condition. It was pulled from a working environment where it was in use. The unit has no battery installed — it requires two 12V 8Ah sealed lead-acid batteries (such as the Universal Power UB1280) wired in series for 24V DC; a battery connector pigtail adapter is visible inside the unit and shown in the photos. The exterior shows typical light wear consistent with previous office or data-center use. Please view our photo set and contact us if you have any questions.
Warranty Information
Additional Information
Brand: |
APC |
Model: |
Back-UPS 900 |
MPN: |
BK900 |
SKU: |
25842 |
Type: |
Uninterruptible Power Supply (UPS) |
Condition: |
Used – Pulled from Working Environment |
Seller Notes: |
No battery included. Requires 2x 12V 8Ah SLA batteries (e.g. Universal Power UB1280). |
Country/Region of Manufacture: |
United States |
Form Factor: |
Tower / Desktop |
VA Rating: |
900 VA |
Wattage: |
630 W |
Input Voltage: |
120V AC, 60Hz |
Output Voltage: |
120V AC, 60Hz |
Max Output Current: |
7.5A (900W model); 10.4A (900M model) |
Input Current: |
12A |
Battery Voltage: |
24V DC (2x 12V batteries in series) |
Battery Requirement: |
Qty 2, 12V 8Ah SLA (e.g. UB1280) — not included |
Number of Outlets: |
6 x NEMA 5-15R (battery + surge protected) |
Interface / Communication Port: |
DB9 serial port (rear panel) |
Overload Protection: |
Yes — fuse protected (per rear label) |
Site Wiring Fault Indicator: |
Yes |
For Use With: |
Computer loads — see manual |
Compatible Battery: |
Universal Power UB1280 12V 8Ah (qty 2 required) |
Condition Notes: |
This APC Back-UPS 900 (BK900) UPS has been inspected and is in good used condition. Pulled from a working environment. No battery included — requires 2x 12V 8Ah SLA batteries. Battery connector pigtail included inside unit. |