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Does the ComBox need an external power supply when using the ComBox to upgrade inverters on Xanbus?

Issue:
Does the ComBox need an external power supply when using the ComBox to upgrade inverters on Xanbus?

Product Line:
Conext XW+, Conext SW, Conext Combox

Environment:
ComBox during upgrade process

Resolution:
A ComBox that is only powered through Xanbus with the connected inverter, when upgrading the inverter will cause the inverter to stop producing power on Xanbus, causing the Combox's power to be interrupted, which will in turn cause firmware upgrade issues.

Also, if the ComBox is connected to the loads panel of the XW+, using the 12V power supply, loads will be interrupted during the upgrade process.

If power going to the ComBox is interrupted during the upgrade process, this might leave the connected inverter in a bricked state (firmwareless).

Be sure that the Combox's power supply is not interrupted during the upgrade process.

Causes:
Issue not sufficiently covered in ComBox manual or firmware update guide
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