I don’t engage in long form discussion on HN anymore due to the moderation policy, I’ll say in short 1) You are in the process of being scammed. 200A is plenty

I don’t engage in long form discussion on HN anymore due to the moderation policy, I’ll say in short 1) You are in the process of being scammed. 200A is plenty to run an EV charger and 400A is absurd. 2) The max at home charge rate is 240v60A, 200+ amps extra is more than enough to peak charge three teslas at the same time. Install a sub panel and 240v 60A outlet in your garage, then set your EV to charge around 11 or so. You’ll be done by 1-2am and never notice it.