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My local Firestone said they needed 5 hours to do our 2022 M3. When asked why, The text said it needed to be in certain service modes as well as to make sure the brakes were gonna lock up on it. Has anyone else had this experience?

When the sun is shining and the panels are providing power, how many amps do you have yours charging at? For example, if your panels are only producing 20a worth of power and your are pulling 30a, you would be pulling from the grid ,yes? I know I need to convert to watts/KWh but you get what...

Thank you

But what about cost from the grid? 10 ,20,32amps. Higher amps must cost more yes? I need to figure what the max is for our solar panels ( 3.84kwh max)

2021 M3 standard plus. Have a 240v nema 14-50 charger in garage. So, what is the cheapest/most efficient way to charge the car? we have a 3.84kwh solar set up at home. Best to charge at like 20a when the sun is shining until 4pm( when it’s peak electricity rates)? And or let it trickle charge...