I am looking for a dual +48v DC PSU ( Failover ) with battery terminals to connect battery bank?
Looks like dual +48v DC PSU are difficult to locate so option B is look for a DC failover switch, once again any recommendations are welcome!
A hitless (no current interruption during switchiver) DC failover switch normally consists of two diodes, so the source with higher voltage wins (and if you can fine-tune the output voltage of at least one of them, they can even share the load to a certain degree while both are fit).
I did a quick search for +48V failover module and so far +30V appears to readily available but only came across OMRON S8VK-R20 Module which goes to +60V?