Hi
I purchased an electric wheel kit from ebay:
https://www.ebay.co.uk/itm/26-Electric-Bicycle-Motor-Conversion-Kit-500W-1000W-Front-Rear-Wheel-E-Bike-Hub/352709844158?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
The kit is a 1000w motor running 48v and I have a 20a/h 48v battery...