Having this installed near the battery would have zero impact whether I would do it or not. It's on the other side of a metal frame. The hassle of trimming, fishing, and lowering/raising the exhaust would be my reasons for paying someone else to do it. I've done near-identical installs before, but with local installers willing to do these for less than $100 in labor, I have little desire to do another.
I think it'd work great, and I'd have no issue having it installed if I needed a hitch on this PHEV. I'd also have zero issue wiring in a 4-pin harness (for an LED brake light strip on a cargo carrier, or for a small canoe trailer)
2018 Niro LX PHEV
2019 Pacifica PHEV