Kia Niro: Niro hybrid energy flow / Engine Generation/Motor Drive

The vehicle is being slowed by engine compression and regenerative braking.

The hybrid battery is being charged by regenerative braking.

(Engine ➞ Battery ➞ Wheel)

Engine is both driving the vehicle and charging the hybrid battery. (Engine ➞ Wheel & Battery) ...

The engine and regenerative braking system charge the hybrid battery driving deceleration. (Engine & Wheel ➞ Battery) ...

Kia Niro 2017 (DE HEV) Service Manual: AC Inverter Unit Repair procedures
Removal 1. Disconnect the negative (-) battery terminal. 2. Remove the luggage side trim [RH]. (Refer to Body - "Luggage Side Trim") 3. Disconnect the AC inverter unit connector (A). ...