It's not the "typical" electric panel. The units already have one. It's "a new electrical distribution system in which the equipment is larger than the existing ones, and that closet space is needed to safely supply electricity." That is the only detail the HOA has provided. Based on that description, it sounds like it will take up all 7-sf space (8" X 8'4").
Based on how the units are configured, that is the only area that could be used. There's a door in the hallway that leads to a room next to the unit where presumably the old distribution unit is located. It's going to "intrude" into the owners' space. It's like "eminent domain" where the HOA is seizing 1% of that space, which happens to be somewhat vital. I mean, whereas can you hang your winter articles? I mean, I can see installing hangers and a bench, and it doesn't seem to be a "big" deal, it seems to be.
It's like a room in condos that are used exclusively for building use only, in this instance, it presumably contains the old distribution system.
Hope that makes sense and clears things up a little. That's why I don't think it's simply a cost to cure item. Definitely obsolescence, but determining the impact of value, well that's a mystery.