The SP unit
is cooled directly by the outside water. Since neither a fan nor pump is required to dissipate the heat generated by the compressor, it consumes much less battery power and operates remarkably quietly. It makes use of the natural pumping movement that takes place in the SP on-board outlet to the sink in the pantry.
The Isotherm ASU system
provides maximum cooling capacity
of the batteries. It detects when excess energy from the boat engine generator
is present and increases the speed of the compressor to quickly cool down the cold battery.