My institution is considering installation of general EV chargers in the parking lot. Several questions popped up. 1. What type of charger? 2. How many bays? 3. How long a duration to permit users to plug-in. 4. To "charge" a dollar amount to the user or not (e.g. a 10 dollar worth of charge" every time someone plugs in. 5. Should it be "locked" to prevent unauthorized use, during non-working hours. Any thoughts or suggestions?