Readout
Can the readout be turned so that the unit can be placed on its side. Also does the readout stay on constantly
The display interface can be configured to remain continuously illuminated or to extinguish after a period of inactivity to save electricity.
Power-Saving mode, the display will illuminate if a button is pressed, it will extinguish after 60 seconds of inactivity.
The LCD will not rotate when placed on its side
http://www.apc.com/shop/us/en/products/Power-Saving-Back-UPS-XS-1500/P-BX1500G
documentation tab.