I personally wouldn't get too hung up about Solar integration unless you have an 'oversized' PV array.
The minimum setting that the car can be set to charge from is 6A, so around 1.4kW. As a result, in full solar mode, iirc they will not charge unless you have at least that as an excess, which if wanting to charge for sustained periods, will limit charge opportunities. You have to weigh up saving pennies, for a system that may well be turning itself on and off on a regular basis.
Better to have a constant charge rate imho, which I believe some chargers (inc zappi) do offer,. However, I have yet to be convinced that, the additional cost of solar chargers offer any advantage over looking out of window and combining this with knowledge of what charge is needed and a typical insolation pattern is for your array at that time of year - something that anyone who has owned PV for a while will know very well - exactly the same way that you would schedule a washing machine or dishwasher.
Don't get me wrong, it would be nice to have a system that followed my insolation curve to start/stop the system, but I then view any charge within that insolation curve that comes from excess as a bonus, just as I do my washing/dishwasher. This is based upon my view that I will charge because I have to rather than because its my 'free' energy and sod the rest of the grid that can benefit from my export. Taking that to its final conclusion, overnight charging is probably a better strategy, except on a few odd days when daytime power is plentiful.
Add to that, when more complex tarrifs become more widespread, such as Octopus Outgoing, you may find it more economically viable (and environmentally/grid beneficial) to get paid for each unit (@5.5p on Outgoing) you export (much as I like its simplicity, deemed 50% export encourages waste in some scenarios) and import (@5p on Octopus Go) at a time when the grid and your pocket benefits more - you just made 0.5p/kWh profit to charge your car and it didn't need a solar integrated charge point or a battery!
imho.