I'm making a thing! OpenEVSE LoRa support

That sounds like it would need strict orchestration, implying that one might need guarantees of message delivery? If so, then even with confirmed LoRaWAN downlinks, I wonder if LoRa(WAN) should be the technology of choice.

Indeed. Also, I feel that this limit is quite a sane limit, that should also apply to private installations, unless one is willing to deploy a lot of gateways, each covering a small area.