Alternative for Electric Refrigerator: 12v Refrigerators
Source: https://www.outdoorhappens.com/best-off-grid-refrigerator-options/
The RV and camping communities swear by the 12v (DC) refrigerator because of its portability and ability to chill and freeze their food and drink. Power for this type of off-grid refrigerator comes either from the vehicle’s battery or a solar system installed on the vehicle. Many models also include an AC adapter to get the unit “chilled by the grid” before leaving the city.