Kia e-Niro with 11kW OBC and DomBusEVSE home-made wallbox: Power Factor vs Charging Power.
This video shows that power factor, that ideally should be 100%, decreases to 80% when charging power is below 2kW.
This was measured with a 1% accuracy by a home-made wallbox using DomBusEVSE module integrated in Domoticz home automation system.
https://www.creasol.it/EVSE