One of Meshtastic's common applications is standalone solar nodes that just sit on the top of a large hill or mountain and relay messages "indefinitely". There are a few in my area and it enables basic text communication even if there was no internet or power grid. Here's a recent video on building a solar Meshtastic node: https://www.youtube.com/watch?v=oCrBMthrCKc

There are limitations. It scales well with a maximum number of around 70-80 nodes, which is a quite low number.

If its solar powered, then it should work to some capacity.