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How do I update the firmware of an XU1K3LLXXRCC and select Smart-UPS Ultra and SRT models using a USB Flash Drive?

How do I update  the firmware of XU1K3LLXXRCC, XU2K0LLXXRCC, and select Smart-UPS SRT models using a USB Flash Drive?

Links to download all necessary files can be found at the end of this document and in the table below.

Product Line:
Smart-UPS XU Industrial
Smart-UPS SRT 5-10kVA

Smart-UPS SRT 5-6kVA, UPS ID1020 & ID1044
Smart-UPS SRT 8-10kVA, UPS ID1021 & ID1045
Smart-UPS Ultra 2.2&3kW, UPS ID1034 (version 06.1 and higher) & ID1062 (version 01.3 and higher)
Smart-UPS Ultra 5kW, UPS ID1226
Smart-UPS Ultra 8&10kW, UPS ID1227

Certain Smart-UPS SRT and Industrial XU models support UPS firmware update via a USB Flash Drive.

This method not supported by certain Smart-UPS Products. This FAQ will explain how to perform this update on specific UPS models specified above.
For information on updating the UPS firmware via a Network Management Card, or the Firmware Upgrade Wizard, please refer to FAQ FA164737 .

NOTE: During the update process the UPS will not be able to provide battery backup in the event of a power outage

Follow the steps below to determine your current UPS firmware revision and ID, select the proper firmware image, and update the UPS firmware.

Step 1: find the current UPS Firmware version via the UPS LCD display:
From the main menu of the UPS LCD screen, select "About" and scroll down to "UPS Firmware".

Step 2: find the current UPS ID:
Every Smart-UPS has a unique UPS ID. This can be found in the "About" menu on the UPS LCD screen, or in the NMC web interface.
  • Follow the link the video guide on How to locate the UPS ID for APC Smart-UPS
  • The same models of UPS may have different UPS IDs depending on when they were produced.
  • The final firmware version will be determined by the UPS ID and not the Model Number of the UPS.

The "Microlink ID" is a unique identifier for the hardware platform of your UPS. We use the "ID" number to make sure we select the correct firmware file. Sometimes one specific model UPS may have different "ID" numbers depending on when it was produced. Always check the "ID" number of the unit you are going to update and ensure you use the firmware file with the compatible ID. Using the incorrect firmware file can result in damage to the UPS.

Step 3: Download and unzip the appropriate firmware file bundle available to download at the end of this document. Save the folder on a local drive.

Use the table below to determine the correct firmware file. Some of the following firmware files are not attached to this FAQ document. Always check the product page on apc.com for the latest firmware file. Example:

download from web
Latest Firmware ReleasedFirmware
Update with
Output On
1020SRTSRT1020UPS_15-7.encUPS 15.7YesThis FAQ
1021SRTSRT1021UPS_15-5.encUPS 15.5NoThis FAQ
1044SRTSRT1044UPS_16-9.encUPS 16.9YesThis FAQ
1045SRTSRT1045UPS_16-6.enc UPS 16.6NoThis FAQ
1226SRTLSRTL1226UPS_03-3.encUPS 03.3NoThis FAQ
1227SRTLSRTL1227UPS_01-1.encUPS 01.1NoThis FAQ
1034SRTLSRTL1034UPS_06-3.encUPS 06.3Yesapc.com
1062SRTLSRTL1062UPS_04-3.encUPS 04.3Yesapc.com
1016XUXP1016UPS_15-0.encUPS 15.0YesThis FAQ
1017XUXU1017UPS_15-6.encUPS 15.6YesThis FAQ
1033XUXU1033UPS_15-6.encUPS 15.6YesThis FAQ
1057XUXU1057UPS_16-5.encUPS 16.5YesThis FAQ
1058XUXU1058UPS_16-6.encUPS 16.6YesThis FAQ

Step 4: Follow the instructions below to update the UPS firmware:

Step 1

Important: The USB drive must first be formatted, and configured to FAT32 file system.

Copy the correct .enc firmware file only to the USB Flash Drive.

Step 2

Connect the USB device to the USB port of the unit.

Step 3

Wait until the system detects the USB. Verify the screen in the next column is displayed. This screen will be shown for about 1minute.


Step 4

After 1 minute, the USB Device menu will appear.

Note: If this does not appear, go to the Configuration Menu, and select USB Device


Step 5

Scroll down and select “Install UPS Firmware”


Step 6

Select “Yes” to update the firmware
Note: Do not remove USB while updating firmware


Step 7

Display automatically pop ups with “Receiving Firmware Image X% Completed”


Step 8

Validating the file


Step 9

Display automatically pop ups with “Installing Firmware X% Do Not Power Off”


Step 10

Once update is successful, the system will reset and display this screen.


Step 11

The system will now return to the "USB Device" menu.

Select “Eject”.

Once “Safe to Remove USB Device” pops up you may remove the USB drive.


Step 12

Once the USB Drive is removed you need to reboot the Network Management Card:

  • Login to the NMC Web Interface

  • Go to the "Control" menu

  • Select "Network" then "Reset/Reboot"

This will reboot the Network Management Card. Your load will not be affected

APC United Arab Emirates


SRTL1226UPS_03-3.zipSRTL1226UPS_03-3.zip [8.6 MB]
SRTL1227UPS_01-1.zipSRTL1227UPS_01-1.zip [8.78 MB]
Firmware Files.zipFirmware Files.zip [48.58 MB]
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