What’s behind “Backup Power Support: Seamlessly integrates with a 12V battery pack for uninterrupted operation during main power outages.”?
If that’s what you want it to do (but remember it’s only keeping the Velbus side alive, not the final loads.)
Or it will balance a load between two supplies
You remember what you always end up saying at the end of these posts…
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I have an independent UPS backing up Velbus, so it’s not for me (yet). Anyway, I’m delighted to see that there is a dual power supply. For some industrial stuff it’s a must-have.
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fairly sure a UPS is cheaper too
Yes
But will that show issue with the Velbus PSU?
The PSUManager is more than just a UPS
I’m fairly sure I was blind or the info was not there initially. The module allows power balancing! 
”Redundant Power Management: Balances the load between two 15V DC power supplies, providing up to 120W total load capacity.”. I’m getting more nervous about the PSU I currently have, with every module added - the load balancing allows to bolt on another PSU
Edit: blind is the most likely option…. Anyway, added to the shopping list.
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