This was my answer to Zappi problems from a similar thread, they are my experience
I found the Zappi (I had the type 1) over complicated, the new one more so. I had solar panels at my old house on the FIT deal with a power diverter to heat the water with the excess electricity.
For various reasons I found it easier and no more expensive to charge the car on the 5p octopus go cheap rate (this is to do with most days in the summer still having cloud and the zappi was on program to top up with power from the grid & other option of switching on and off as per cloud cover is unacceptable for charging EV). In winter the solar panels were rarely usable for charging.
My new house is not orientated to install solar panels effectively (although I am monitoring the costs) However I am looking at the home battery option, but am sure storage capacity is about to rise and costs plummet so am happy to wait (the comparative costs between a 6kw home battery system and a 76kw car battery just dont add up to me).
FYI, I installed a EO mini pro at the new house. I find it very user friendly and it has solar