Chevrolet BOLT 2017 39,800 miles with GM new major battery replacement.
for $60 one could useIt doesn't matter what the generator can deliver if the car can't receive it.
There are 3 ways to charge the Bolt:
Level 1: 120V AC, maximum 12A, maximum 1.44 kW
Level 2: 240V AC, maximum 32A, maximum 7.7 kW
Fast Charge: 400V DC nominal, maximum 150A, maximum 55 kW
If the generator only has 120V AC, the most you will be able to charge is 12A and 1.44 kW.
You need a generator that can deliver 240V AC. Then you can charge up to 32A and 7.7 kW (if the generator can deliver that much).
If you want a generator to use your Bolt's fast charging system, the generator will have to deliver Direct Current (DC) at 400V nominal. It will also need a control system that can communicate with the Bolt according to the CCS standard.
Regardless of the generator, the Bolt will not allow you to drive while you are charging.
SEYAS 500W Auto Step Up & Step Down Voltage Transformer Converter, 110-120 to 220-240 Volts, Soft Start & Full Load, 7x24hrs Continous Run, Circuit Breaker Protection, U.S. Patent No. US9225259 B2