Should not be a problem but we have an ohme charger and stopped using the Ohme ap due to unreliablilty which they said was due to fluctuating voltages.... We now use the car ap and it works fine..
I have to leave the car I a garage in Spain every year for 6 months and I have tried all the following and they all result in the phev not starting when I return.
1. Charging the drive battery only with supplied charger
2. Charging the drive battery only with supplied charger AND trickle...