Paradigm Shift on Substation Protection

good day everyone, it's been quite a long time since i got back here. i ask apologies from the active members and masters here. anyways the question as follows: our existing practice in our company was to use the conventional charging system for a substation protection dc supply- battery bank plus conventional charger; recently an idea came into mind given the advancement in the technology specially on the Solar Hybrid technology utilizing Inverters in it's charging system. is my theory valid if that same technology, less the solar pv, used as replacement for the conventional charging system of the battery / dc supply for the substation protection or has anyone been practicing this on their designs? thanks