There are units on the market already: MUSTART TRAVELMASTER Level 215A/25A/32A Electric Vehicle Plug-in Charging Station https://www.amazon.com/dp/B085R9R343/ref=cm_sw_r_cp_api_glt_fabc_N2V1PV9HWNYDCDDM04EX

You are too patient!

NEMA14-50 can safely provide up to 40A to the right EVSE. But if you settle on a 16A max EVSE, even if you plug in to 14-50, you will only get 16A of juice.

How fast?

• 120V 12A = 1.44 kW (typical HH outlet - requires 15A power source)
• 240V 12A = 2.88 kW (stock EVSE with any 16A or greater adapter and power source)
• 240V 16A = 3.84 kW (16A EVSE with and 20 A or greater adapter and power source)
• 240V 24A = 5.75 kW (24A EVSE with 30A or greater power source)
• 240V 30A = 7.2 kW (30A EVSE with 40A or greater power source)
• 240V 32A = 7.7 kW (max for Bolt - 32A EVSE with 40 A or greater power source)

With whatever solution you get, the lowest rated piece of equipment will dictate your max charging speed.

To understand how long it will take, divide Bolt's battery capacity (60 kWh for 17-19 MY, 66 for 20+ MY) by the kW above to give you hours it will take from 0-100%, then multiply by the amount of charge you need (40% SOC when you plugin, 100% SOC target) = 60% of the 0-100% time above.

When traveling, the most common plug type will be 14-50 in RV parks. To minimize your wait time, go for the highest speed you can get\afford. If you are convinced ALL of your AC charging will be overnight, you might be fine with 16A (16 hours from 0-100%), but if that is a midday charge stop, hell will freeze over before you reach your destination.

If you want the most flexibility and highest possible charge speed, consider the Mustart TravelMaster. Or, get a full wall mount EVSE that is small enough to bring along, and a few common adapters for the different outlets you will run across.