Rereading this... I think Artie is a little confused.
4 years ago, Bafang didn't offer a 1500w mid drive and for sure it wasn't on a Velotrix? / Velotric?
4 years ago the M620 was 1000w and now the M630 is 1500w.... though mod controller/motors from Innotrace were available at 1500w and above.