I have a 2020 Kia Niro PHEV and for the last three months have only been able to charge it using an extension cord. I know this is not recommended but I have no choice as I am temporarily renting. I have the Type 1 charger plugged into a 14A outdoor extension cord just outside my front door and then it is plugged in inside. The last couple of times I have charged it it keeps shutting of after a short time (maybe 30 minutes or a few % points of charge). If I just unplug the extension cord and then immediately plug it back in then it works again for another short while. even when it is no longer working the charger still shows power coming into it but not going out of it - according to the graphics on the face of it. I would like to know if this sounds like a problem with the charger, the extension cord (should I get a more heavy duty one?) or the house wiring)? I don’t know anything about wiring so please don’t use too many acronyms.