@ChrisD. Ohme can't charge from solar which is another strike against it.
While export rates are currently higher than overnight rates so charging from solar is not the done thing at the moment. However, the current trend is export rates going down and overnight import rates going up. Since I've had EV's the 'gap' between the two has been as high as 10p, it's now between 4p and 6p depending on your combination of supplier and tariff.
I've also seen people post on here about the fronts of the Ohme Pro units falling apart due to UV exposure which is 'not great' for a product which is meant to be outside.
The way the product is designed just looks untidy IMO. The unit requires a visible junction box as it comes pre-wired with a tail that needs to be joined to the supply cable. It also doesn't have any cable management so you end up with the cable draped over a hanger somewhere.
Compare the above with the Hypervolt and the Zappi (not a looker but no worse than the ohme), both have cable management built into the unit itself and just looks so much tidier both when in use and out of use.
Another thing to consider is control, the Zappi has physical buttons and a screen on the device, you can program every function on the device directly so if the cloud goes down you can still use it as a 'smart' charger. Zappi and Hypervolt both have eithernet and WiFi, Ohme is cellular only which you may get charged for in the future. All 3 support home assistant but I think all 3 route commands via their cloud service only.
I would get the Hypervolt or Zappi if it were my money. If you care about how it looks, consider Anderson (£££).
As for towing, happy to have a chat but you are not wrong about issues when charging out on the road. That said, newer models are getting ~180 miles range now (>100kwh battery so IX3, EX60) and there seems to be new pull through chargers opening up every other week at the moment but yes, it could be a lot easier if there were more, a lot more.
We usually do 3 or 4 trips per year where charging is required en-route, pretty much always need to un-hitch as we travel at peak times. The longest I have done is 320 miles which needed a 2 charges behind our older Y. Again, with these new models, the stops are not that much longer than you would probably stop for anyway.