To be honest I'm not an expert of all generations/versions of AC/DC charger in Kia, as for me it was just a piece of electronics.
I have compared one working from EU Kia and one failed (but not rapidly failed, rather slowly dying, causing charge fails, etc, until final death). That one is as you have found from US.
I have read firmware from both controllers via JTAG port. Controllers are same, processor used is SPC5643LF from Freescale Semiconductor, in LQFP144 form. Then - I have disassembled both to find limits and change them in future (we will accelerate charger just to stress test our upgrade we do for it - we would set it to 10kW with some critical parts upgraded. Customer has few these Kia's imported from USA, and some have failed, or failing chargers.
Possible, that we will leave these Kia's with 10kW charging speed with our 2-phase charger (as then they will have 5kW load per phase, so maybe drivers (these cars are for Eco-Taxi network) may charge at home, if they have 20A-25A per phase fuses.
BTW, Fiat 500e cars will be more interesting to have accelerated chargers to 10kW, as they have no ChaDeMo port. Only Type1.
Actual failure of these Kia chargers is simple (I assume they all die and suffer from same problem) - underestimated local temperature of some power elements. We have replaced all them to 30% more capable and improved whole cooling, adding one copper heat pipe to these, which are not in contact with glycol cooled surface.
Now I have 3 x Fiat 500e and one Mitsubishi i-MiEV waiting for service with similar failure, I think they may have same problem.
