Solar timer project to charge an EV

[Wawa]

@geoffreybaker

A RTC is interesting, it should do the job but would require a fair amount of programming to follow sunset and sunrise.

Not true.
NTP (getting time off the internet) doesn't need a RTC and is very accurate between updates. Two or three lines of code can calculate sunrise/set/angles for your location.
Can give you a simple example for that.
Leo..