Referrals requested for adding regen braking to ebike kit

ebike Richard

New Member
I have a 48-volt rear-hub non-geared motored ebike assembled from a kit with 5-level PAS and a throttle.
I'd like to add a regenerative braking system (ideally a 4-level system) to my ebike.
I want a regen braking system so I won't have to ride my brakes so much while going down steep hills.
I realize I likely will have to replace my controller, but that's fine.
I'd appreciate any information / suggestions / referrals which would help me achieve this goal.
So far I've heard of a one-speed regen system controller made by EM3EV
and was wondering if there are others, particularly one which offers several levels of regen.
I live in the San Francisco bay area.