I see others have posted their solar-to-EV charging solutions so here’s mine.
I have a Victron MultiPlus and MPPT and been using the Node-Red add-on in the Victron open source operating system (Venus OS v2.70~5-large-18) to control my openEVSE car charger via MQTT. It maximises the available power from the PV array to charge the car. When there isn’t enough power it will use what is stored in my BYD batteries and when they’re depleted it uses the mains. It is now stable enough that I have placed the json file and a brief explanation on GitHub (GitHub - thepaulcooper/victron-openEVSE: openEVSE controller for Victron PV / battery system).