Like most electric motors, the refrigerator will use a high current when starting the motor, after which the current will return to the level of continuous use. Refrigerators and freezers can be rated with the current they will use when the engine is running or with an average hourly consumption listed.
When you get to your boat, the refrigerator will have to run continuously for an hour or more as it drops to its normal operating temperature, after which it will operate intermittently. To get more information about boat refrigerator visit https://kampetorpmarin.se/marin/kok-badrum/kyl-frys.html.
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Typical small floating fridges will draw around four to five amps per hour, although draw can be as high as twelve amps. When the engine is running, the circuit is rated higher than this to cope with the higher power boot.
Boat coolers are one of the few on-board motor units that operate more or less continuously. This means that when the motor stops, it will be one of the main users of the current and is the most likely cause of a discharged battery if care is not taken.
Some refrigerators include a device in the control circuits to warn when the battery voltage drops. In some cases, the refrigerator will automatically shut off if this occurs, to prevent the battery from draining deeply.
Dual-voltage coolers can be purchased so they can run on battery power and offshore power. Another option is a refrigerator that can run on bottled gas or battery.