User Manual
Back-UPS Pro BX850/1000/1350/1500M
9
Specifications
Replacement Battery
The battery typically lasts for 3 to 5 years, a shorter period if subjected to frequent 
outages or elevated temperatures. Battery replacement parts for Back-UPS BX850M is 
RBC17, for BX1000M is APCRBC158, for BX1350M is APCRBC123, and for 
BX1500M is APCRBC124. Delaying the replacement of parts may corrode the batteries 
in the cartridge. Recycle spent battery cartridges. 
The REPLACE 
B
ATTERY indicator is 
illuminated.
The battery has reached the end of its 
useful life.
Replace the battery as early as possible.
The O
VERLOAD 
indicator is 
illuminated.
The equipment connected to the 
Back-UPS is drawing more power 
than the Back-UPS can provide.
Disconnect non-essential equipment 
from the Battery Backup outlets and 
connect the equipment to S
URGE 
outlets.
The S
YSTEM ERROR 
indicator is 
illuminated, all the 
front panel 
indicators are 
flashing.
There is an internal error. Determine which internal error 
message is displayed by matching the 
number displayed on the LCD with the 
corresponding Error Message (see 
"System Errors") and contact SEIT 
Technical Support.
Model BX850M BX1000M BX1350M BX1500M
VA 850 VA 1000 VA 1350 VA 1500 VA
Maximum Load 510 W 600 W 810 W 900 W
Nominal Input Voltage 120 Vac
Online Input Voltage Range 88 - 139 Vac
Automatic Voltage Regulation (88-107) +11.2% (compensate for low input voltage)
Frequency Range 60 Hz ± 1 Hz
Battery Type Lead acid, 12V with 1 battery Lead acid, 24V with 2 batteries
On-battery Waveshape Step-approximated sine-wave
Typical Recharge Time 12 hours 16 hours
Transfer Time 8 ms (typical), 10 ms (maximum)
On Battery Runtime Go to: www.apc.com
Interface USB
Operating Temperature 0 to 40C (32 to 104F) 
Storage Temperature -5 to 45C (23 to 113F) 
Unit Dimensions
19 x 9.1 x 31 cm 
(7.5 x 3.6 x 12.2 in)
25 x 10 x 38.2 cm 
(9.8 x 3.9 x 15 in)
Unit Weight
6.8 kg 
(15 lbs)
7.2 kg 
(15.9 lbs)
10.2 kg
(22.5 lbs)
11.0 kg
(24.3 lbs)
Problem Possible Cause Corrective Action










