How long do I need to charge for a full charge and will this impact my battery?
This will vary depending on your vehicle type and battery size.
However you can use the calculation below to get an estimate:
Time to charge = size of car battery / speed of charger
For example, a 40kWh Nissan LEAF / 7kW home charger = 6 hours.
Your car charges similarly to a phone - to preserve battery life they will charge at full capacity until approximately 80% and then depending on the battery requirements will begin to trickle charge to ensure that the battery stays at optimum health for longer.