I've just used the provided charger the whole time I've had the car through a standard outlet in my garage. Probably on a 10A circuit. Check the specs of the charger for what it needs and can actually use.
I've got a 2017 outlander PHEV with only 47.7% remaining battery capacity (Tested and confirmed by service centre). Mitsubishi states this is normal, which I struggle to believe. What's everyone else's experience?