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After I got the email about disconnecting & reconnecting my 3, I decided to try giving control to the Zappi instead. Setup was easy (the test charge was only about 1 minute) and first results are promising … 1) Schedule comes through immediately after plugging in. Previously a long delay. 2) No...

Re the surcharge: the Expensive Car Supplement seems to apply to the first five years of the car’s life only. So not a concern for those of us with elderly cars.

Some noise is inevitable in this analog measurement. Solar systems have the same randomness at night. I would treat anything under 10V as zero.

Done at service centre last year (2019 car). They replaced both sides although the noise seemed to be from one side only.

I had the same situation, all in the same day - charged at home at low amps from solar in the afternoon, then the scheduled charge overnight continued at the same rate. Luckily I was up in the night and saw what was happening. As Kelvin said, the Tesla app wouldn't let me increase the current...

My setup is different – Zappi, Victron inverter, Pylontech, 3kW AC-connected PV – but maybe the concepts will carry across. No big changes were needed to get the Zappi to play nicely with the battery. In the morning the inverter software does a good job of taking all the surplus PV for the...