I recently got an E-max 110s 2008 model.
This comes with the stock 48V SLA battery and 4000W motor.
I would like to upgrade it to a 72V Lifepo4 pack.
I am getting an 18 fet controller from Lyen
I'm planning to build a pack from Headway 40152S cells, in 24s 5p configuration to give me a 60Ah pack.
The main problem I have is the existing 48V motor controller and the control box for the other scooter electrics are all in proprietary sealed circuits.
view under seat.
view under handlebars.
So my main concern is fitting the new controller without affecting the existing functions.
All the visible capacitors on the existing controller and DC/DC convertor are 63V so that rules out using them with higher voltage.
Should I leave the existing controller powered from a 72-48V dc-dc convertor and keep the electrics running off that, or completely remove it and attempt to rewire as a basic scooter wiring loom?
I have no schematics for this bike, if anyone has one it would be much appreciated.