Project build advice QS 4kw/7kw kelly KEB72601 72v 60a/120a

[smeagol222]

About to start building a new project and would appreciate if anyone has general advice, pitfalls or things to watch out for

Going to be put into this style ebike/scooter type Daymak Eagle / Emmo monster

10" 4000w v3 QS motor (I've been told by QS its more like 7kw peak).
http://www.qs-motor.com/product/10inch-4000w-v3-type-e-scooter-hub-motor/

Paired with 4KW-4.5KW Kelly Programmable Motor Controller(KEB72601) Peak Phase 280A Continuous Phase 110A (which I'm told at 'normal' values its 55-60a continuous, and 90amp peak)
http://www.qs-motor.com/product/4kw-4-5kw-kelly-programmable-motor-controllerkeb72601/

using 6awg wires and Zeva smart precharger
http://www.zeva.com.au/Products/datasheets/SmartPrechargerV1-3.pdf

this main contactor
SW80 NO (normally open) style Coil Voltage 72V 100A DC Contactor ZJW100A
https://www.aliexpress.com/item/SW80-NO-normally-open-style-Coil-Voltage-72V-100A-DC-Contactor-ZJW100A-for-motor-forklift-electromobile/32607144199.html?spm=2114.13010608.0.0.5VKrWN

Getting 72v 40ah portable lifepo4 (60a continuous, and 120amp peak discharge). Plastic box with handle needs to be charged inside apartment.
Wheel 7000w peak, but 72v x 90a is 6480w.

To get to the true peak 7000w/72v = 97.22a? Setting kelly controller to 69% (since it does 140a peak)

 

[kin27779]

Please let me know how it goes, as I am interested in this same setup and living in China currently where there are many 1000w qs motors on scooters here. I own the 1000w qs motor and it goes 66kph when fitted with an extra big tall 10 inch tire. I would like to upgrade my current motor to the 4000w as well to get a 100kph max speed. Please update your battery specs and pics. With so many premade lifeo4bats in China its hard to chose the best one. Was thinking to get a 40or 50ah bat. Looking forward to your build! BTW, Michelin city grip is the best grippiest 10 inch tire I have found. Sadly the dual compound sc pilot pure aren't available in 10 inch size.