It’s important to remember you’re not selling electricity; you are renting your charger. The price you set needs to take into account:
Minimum price is simple: how much is the minimum that a Chargee should pay for a session, to make it worth your while in setting the session up? Keep in mind that beyond the first one or two sessions, you probably need to do nothing beyond confirming the session data so you can get paid. The minimum setting is £1.
Most modern electric vehicles on the market today operate on a “Type 2” charger. The images below should help you select the correct type.