We deliberately went high end on the brakes we used for our ebike. The Tektro MD-M300 system is one of the best out there. A lot of ebike braking systems didn't fill us with confidence when testing out what system we would use on our own, until we came across these which feel rock solid.
Low maintenance calipers with automatic caliper centering and automatic pad angle adjustment via floating plates.
Weight (entire system): 300 grams per wheel