The charging rate is based on Voltage and Amperage (Wattage).
The travel cord is 12A at 120V, so 1440 Watts (120*12) max. A 16A EVSE at 240V would give 3600 Watts max.
Without knowing what battery you have, you can expect a little under 3 miles of range per 1000W every hour of charging. That 16A charger will give you about 10 miles of range for every hour you charge.
The onboard charger in the car seems to top out around 29A, so with a 30 or 32A EVSE, you're still only going to get 29A * 240V (~7000W). That will give you about 20 miles for every hour of charging.
Before you spend money on a 16A, be aware that a lot of the 12A travel cords actually work on 240V. I know the original one did and I know the newer replacement I got from Ford does as well.
It's still limited to 12A, so it give you ~2900W instead of 3600. I only mention it because 10 miles of range an hour may not be worth paying for when you can get 8 miles with the cost of a dryer plug and a screw terminal receptacle.
Depending on how often you need to charge and how many miles you drive, you may never need a 30A charger. If you do, there are many to choose from ranging from bare bones stuff (Clipper Creek), intelligent connected ones that can track your usage, schedule charging (Juicebox), and cloud connected ones that can adjust charging times to match seasonal changes to the off peak hours of your utility plan, allow your utility to bill EV charging at its own separate rate, and track costs along with at large public charger use (ChargePoint).
2012 Candy Blue FFE
33.5kWh battery pack
CHAdeMO DC Fast Charging