Downloads
Firmware for Webasto UNITE and NEXT
Firmware updates and documents for the Webasto UNITE and NEXT EV chargers – Ampure, formerly Webasto Charging.
Current status
- UNITE
- latest stable firmware: HMI version 3.156
- NEXT
- latest firmware: 3.1.16
How to update a UNITE
Check the version
The installed version is shown in the web interface on the dashboard under “HMI Version”, and in the app under “System status”.
Install the updates in order
The updates build on each other. Start with the file that begins at your installed version and install the following updates one after another up to the version you want.
Install via the web interface
Install the update in the charger’s web interface on the last tab.
UNITE firmware
Stable versions are releases tested with backends. Each file takes the charger from exactly one version to the next.
Original version to HMI version 3.86 (2023)
Stable- from_v2.99.10-to_v2.99.11.update from 2.99.10 to 2.99.11
- from_v2.99.11-to_v3.86.0.update from 2.99.11 to 3.86.0
- from_v3.57.0-to_v3.86.0.update from 3.57.0 to 3.86.0
Classic, MID and 4G to 3.135
Stable- from_v3.86.0-to_v3.92.0.update from 3.86.0 to 3.92.0
- from_v3.92.0-to_v3.118.0.update from 3.92.0 to 3.118.0
- from_v3.119.0-to_v3.135.0.update from 3.119.0 to 3.135.0
- from_v3.128.0-to_v3.135.0.update from 3.128.0 to 3.135.0
- from_v3.118.0-to_v3.128.1.update from 3.118.0 to 3.128.1
Calibration law (Eichrecht) and Classic, MID, 4G to 3.150
Stable- from_v3.128.1-to_v3.150.0.update from 3.128.1 to 3.150.0
- from_v3.135.0-to_v3.150.0.update from 3.135.0 to 3.150.0
All versions to 3.156
Stable- from_v3.150.0-to_v3.156.0.update from 3.150.0 to 3.156.0
3.166 for load management clusters
Special caseFor dynamic local load management with more than three EV chargers in a cluster and a GARO meter, version 3.166 improves stability. It is not yet recommended for single users: the log file format has changed, and many backends have not yet implemented the new format.
- from_v3.156.0-to_v3.166.0.update from 3.156.0 to 3.166.0
Untested version
UntestedNot yet tested with backends.
- from_v3.166.0-to_v3.187.0.update from 3.166.0 to 3.187.0
Webasto NEXT
For the NEXT, the latest firmware 3.1.16 is all you need. It can be applied to any known version.
- update-bundle-acplus-vota3.1.16.zip Version 3.1.16
The matching Modbus register list with the power board’s error messages:
- Webasto_NEXT_Modbus_Register_1-00_external_V3.pdf as of 27 April 2022
Important for your own Modbus implementations: register 6000 (life bit) must be written every 20 seconds.
Notes
- Firmware and documents come from the manufacturer; all rights remain with the manufacturer. They are provided without warranty, and you install an update at your own risk.
- After downloading, check the SHA-256 checksum, for example with
shasum -a 256 filenameon macOS and Linux orGet-FileHash filenameon Windows. - Questions about NEXT and UNITE are answered by the support on behalf of Ampure at ampure@charger-support.com.