I'm in BC with a friend of mine, and we're fixing up an Emmo just like yours! The motor or speed controller (we're not sure which) have died, and we've ordered a Motor and speed controller through Kevin just like you did!
The controller is 40A (with a 50A maximum) at 48v
The motor is similar to the one you used, 1500W, black instead of green stripe, arrives in couple days.
The issue we're having is our batteries. You say you used a 20Ah battery to run your scooter once it was all put back together? N?o problems?
We've been trying to run another scooter with a similar controller/motor setup, but we can't seem to deliver the required amperage and everything gets hot/dangerous feeling.
One battery is a 48V 20AH, with circular green lithium cells and a BMS that cuts it off somewhere around 25/30A discharge
the other battery is a black-cased, no-name Lithium with the plate style/soft cells. It came with the bike and slides in underneath the seat. We don't have accurate Ah or discharge ratings, though my guess is 14Ah - the BMS (if it exists) doesn't seem to cut off at any particular current, which is a concern because at 50A it's gonna get pretty hot by itself.
We're wondering if it's possible to run these two batteries in parallel with the new parts - not really for the runtime factor, but more to evenly distribute the amperage between the batteries. E.g. instead of 40-50amps out of one battery, in parallel we'd be drawing 20-25amps each out of two batteries? Would this work?
I assume if they are different Ah ratings, then one is going to discharge completely before the other, and that's where we run into problems, as one battery will die and the other will be taking the full amp load at that point?
Let me know if you can shed a little light! And AWESOME restore job