I can’t blame them if they are not familiar with Cambium and or, in particular, the cnWave product wouldn’t know!
A lot products that fill the V5000 role (Power/Light Pole Radio) are powered by 110/230VAC, like the Cisco AP1572, ABB TropOS 6430-T, etc.
Though, if they are using solar, I would suggest using DC regardless with a DC/DC power supply designed for solar.