Read through here, it covers the charge rate, regenerative rate etc in the 'long version'.
https://www.press.bmwgroup.com/globa...t-ever-bmw-ix1
Maximum output is 240 kW/326 hp in the BMW X1 xDrive30e
(developed by the combination of the combustion engine with up to
110 kW/150 hp and the electric motor with up to 130 kW/177 hp) and
180 kW/245 hp in the BMW X1 xDrive25e (developed by the
combination of the combustion engine with up to 100 kW/136 hp and
the electric motor with up to 80 kW/109 hp). Now positioned flat in the
vehicle floor, the fifth-generation lithium-ion high-voltage batteries have
an increased usable energy content of 14.2 kWh. At the same time,
maximum charging capacity has climbed from 3.7 kW on the outgoing
model to 7.4 kW, enabling the high-voltage battery to be fully recharged
from empty in 2.5 hours. When hooked up to a conventional domestic
power socket, a full vehicle charge is completed within eight hours.
Electric range is now up to 78 – 89 kilometres (48 – 55 miles) in the
WLTP cycle.