'Equalization' as most of us know is a forced overcharge by bringing the flooded battery upto 15 to 16 volts after a regular 'full charge' until specific gravity rises to its maximum on each cell and hopefully within 0.005 of each other.
Equalization, in the minds of RV converter makers is something entirely different.
Progressive dynamics converters, after every 18 hours at 13.2v, will bump up voltage to 14.4v for 15 minutes.
Their "equalization' is really just destratification. Marketing
Iota's equalization merely cycles the battery back upto absorption voltage of 14.8v again, basically just destratifying the acid as well.
The Equalization Stage will cycle the battery through the Bulk and Absorption
Stages before returning the battery to the Float Stage.
So what we consider to be a true equalization, meaning a forced overcharge at higher voltages, has absolutely nothing to do with what RV converter makers marketers consider equalization, which is just a fancy buzz word used to sell more products.
I am not sure of Engel and their sawafuji compressors as to their maximum voltage, but Danfoss compressors can only tolerate 17 volts in a 12 volt system and 31.5 volts in a 24 volt system:
Also take note that Danfoss's recommends hooking their compressor
controller directly to the battery terminals, and their wire gauge recommendations greatly exceed those of any ampacity chart.
I find it amusing that so many portable fridge with Danfoss compressors, come with a 5 foot long 16 awg cord with a cheesy Ciggy plug
at the end as the power cord. Combine this with the likely way too thin and way too long wiring from the battery to the ciggy receptacle, and spoiled food
can be the result, since the low voltage battery protection kicks in when the battery is in absolutely no danger
Do note that if a Danfoss compressor
sees too little voltage, the condenser fan will still cycle on, but the compressor will not. Since the fan is usually as as loud, or perhaps louder than the compressor itself, the fridge owner might be blissfully unaware that their fridge is not working, since they can hear the fan cycle on and off.
With SawaFuji compressors on the Engel and Norcold portable units, they do not seem to be as effected with too little copper between battery and compressor controller, and one can definitely hear the compressor, and likely feel it vibrate the whole dang boat/vehicle too.