Using the power consumption figure of 87.8 kWh at the wall for a Model 3 with this methodology https://electrly.com/ev-charging-guide/tesla/model-3/how-many-kwh

Using the power consumption figure of 87.8 kWh at the wall for a Model 3 with this methodology https://electrly.com/ev-charging-guide/tesla/model-3/how-many-kwh-to-charge-a-tesla-3 https://electrly.com/ev-charging-guide/tesla/model-3/how-man... 20% or 17.6 kWh can be attained in 9 hours at 2000 watts output with a Honda eu2200i generator. This is the largest generator the average person can hold like a briefcase. Larger generators are insanely heavy.