Many of you pointed out that the Juice Booster 2 is the best (non-Tesla) option for 3-phase charging, albeit at a high price. But caution is advised: one of the reviews (sorry I cannot find it again) reported that this product would give an error message if used in conjunction with Tesla delayed charging features, and thus the user recommended it only if you plan to charge immediately. I would be happy if some of you could relate your experiences.
I call bullshit on this. I have a JB2 and it's just like any other EVSE (but better) and delayed charging or scheduled charging works fine with the JB2.
I've actually never seen an error on the JB2 due to something from the car. Only errors/warnings I've seen were legitimate fault codes for incompatible grids (missing neutral, missing earth)