The 12v compressor fridges can be made even more efficient with extra insulation and insuring the coolest possible air is pushed/pulled through the condenser.
Last time I put my wattgemter inline on my vitrifrigo c51is powercord for 3 days with 75F ambient days and mid 60's at night it consumed 0.62Ah each hour on average as I normally use it.
Whats great about compressor fridges with Danfoss/secop compressors is not only is the compressor RPM variable, from 2000 to 3500 rpm, but it can power upto 0.5 amps worth of computer fans(1 amp 5 second surge) that come on with the compressor. Makes it easy to add another fan to assist the internal fan.
Evacuating the generated heat reduces duty cycle, and also reduces the compressor temperature and the conpressor contoller temperature, increasing their lifespan and reliability.
