2 years ago I used arduino uno to monitor solar generation to charge my battery car only when sufficient generation available with touch screen displays and to input options. This has worked extremely well within the measuring limitations.
I now wish to vary the charging power by monitoring export power and so keep export power to a hundred watts.
My solar I-boost water heater does this quite well, one thought was can the wireless signal between its CT and controller be hacked into and shared?
Any suggestions as to how to monitor export power would be appreciated.