JC refrigeration AC or DC upgrade?

theoldwizard1 wrote:

rdhetrick wrote:
Because the conversion isn't an absorption refer - it's a compressor similar to a household refer.

NRALIFR wrote:
That’s probably what I would recommend. No DC-AC conversion loss.

Every 12/24VDC compressor refrigerator actually INCLUDES its own inverter ! The incoming DC voltage is converted to 3 phase AC and sent to the compressor motor. 3 phase is used because it is a much more efficient way of powering a motor.

Just to be clear, this "built in" inverter is specially designed just for this application. The AC output voltage does not have to "match" any "standard". It can be whatever voltage the inverter and motor designers choose ! Also, many (most ?) of these inverter are variable frequency meaning that the compressor motor itself runs at different speeds as the required.

If I lost you, a DC compressor refrigerator is likely more efficient than a straight up residential AC refrigerator powered by a separate inverter.

Yeah, that would have to be a very special inverter to produce 3-phase AC from 12v DC. The curiosity in me wonders how they do it. I’m familiar with rotary and static AC phase converters, but not DC.

The OP is trying to decide between two conversion options from JC Refrigeration. They offer a an AC kit and a DC kit.

This is a screen grab of the DC unit that’s supposed to be for my fridge. 12V 7.5A 90W

I don’t see anything that I can identify as a dedicated power conditioning device, so I assume it’s inside the sealed can???



And this is the AC conversion kit. I’m assuming these are pictures of the actual units, but they look identical to me. 120V .8A 96W



So, from a power efficiency standpoint, which would be the better way to go? AC conversion kit, or DC?

:):)