Do you have a suggested Stepup converter for the PoEBlox 12V to 44-57V?
I don’t have a specific one we’ve tested, there’s plenty of options. Recommend heaading to Traco Power and doing a parametric search based on the input and output voltages.
In terms of current output, 4 ports at 90W at 48V is around 7.5A, so maybe 10A output current would be needed for a margin of safety if you’re planning on using 90W on each port.