Powering tablets to my alarm panel

I’m planning to use three wall mounted tablets in different locations in the house (iPad mini or equivalent) for my Konnected alarm panel. The panel will be powered using AC Adapter (not POE). Will i be able to power the three tablets using Ethernet POE (DC to USB-C Fast Charging Converter, see link below) or will i need to plug the tablets into an outlet? POE would be much easier for me if there will be sufficient power. Thanks for any input for this noob! 12V to 5V USB Power Converter – Konnected