Huawei R4850G2 power supply solution (Example) - hoylabs/OpenDTU-OnBattery GitHub Wiki
The Original thread is at the Akkudoktor forum:
AC/DC Speicherlösung mit Victron MPPT, Pylontech, Hoymiles, Huawei und openDTU-OnBattery
go to the Akkudoktor site here to see updates. I post here some pictures for redundancy reasons only.
MalteS was kind enough to share the 3D Print of the holder he created: huawei_netzteil_halter.zip
If you want to print it, you may want to check/improve the small deficiency of the model: