Now that story is a prime example of "Necessity is the mother of invention".
EBM-Pabst also made their units in dual voltage, by mounting a Danfoss AC
compressor alongside the !2VDC
compressor, and using a check-valve arrangement.
I installed one of those units in my
boat in '92,, it worked great, but drawing ~35>40 amps at 12V whilst away from
shore power required some
power management skills.
But, it's a eutectic system and only runs ~1>2 hours per day, depending upon load/temp.
As the unit aged I had to remove the cover from the "dome" to expose the brush assembly, then, whilst engaging the thermostat override switch with one hand, I would spin the brush holder with the other hand,, and, if I was lucky the unit would fire-up on the first try.
At one time I had 6 of those units, and am convinced that I was, (at that time,) probably the only one on the
West Coast of the US that really and truly understood the operational specifics of them.
The DC unit went away ~'02, however, the Danfoss 1/3HP 115VAC compressor still resides on the original baseplate along with the 1/2 ton condenser, I replaced the Pabst 16VDC fan with a 115VAC Pabst fan, and the condensing unit is still operational as I type this post.
The unit/system runs on a dedicated
inverter and has given trouble free
service for ~30 years,, no
leaks, no drama.
Well, almost no drama;
Many years ago one of the Ranco thermostats stuck, (I was away,) and the box went down to -20F and froze everything, worst of all it froze all the
beer,, now that was a serious issue, coming back from a days
work and having frozen
beer.
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