Mini-fridge conversion
Posted: Sat Jun 22, 2013 7:29 pm
When you're camping in the desert in the summer, buying ice every day or two gets a little tiresome. I've been looking for good deals on a nice ARB 12/24V fridge but there don't seem to be any used ones ... ever. A new one is at least $500 which I think is outrageous for something smaller than a dorm fridge. Dorm fridges are cheap: i picked one up from my neighbor for $10 that looks like it had never been taken out of the box. However, the side-door would be a problem when bouncing over backroads and taking corners.
Turns out it is really easy to convert one into a chest fridge. Just take the 4 bolts out of the compressor frame and twist the whole assembly 90 degrees, where it can be bolted onto the adjacent frame. That's it. Nothing else to it.
I had to take extreme care not to kink the copper tube because it was already kinked when I got it. As I twisted the compressor, I made sure a different part of the hose bent instead of the kink and it seems to have worked out alright.
Left side of compressor. You can see the previous holes where it was mounted to the frame on the left.
Right side of compressor.
Now it opens like this so all my crap won't fall out when I open the door
The compressor does get extremely hot, especially when I let it run in the sun for a few hours. After a field test, I might enclose the compressor with some sheet metal and install a fan and vent to keep it cooler.
And for the power:
I ran it through a small cheap inverter (1500W peak) and measured 6 amp DC with about a 12 amp peak on startup. When the temperature switch turn off there is of course no power consumed. So with my two deep cycle I think I have 100 amp hours, this thing can run continuously (worst-case compressor on all the time) for 16 hours without a charge!
Next is a 240W solar panel with a SunSaver charge controller ($300 total). I found a very cheap dealer of solar panels in CO if anyone is interested.
Turns out it is really easy to convert one into a chest fridge. Just take the 4 bolts out of the compressor frame and twist the whole assembly 90 degrees, where it can be bolted onto the adjacent frame. That's it. Nothing else to it.
I had to take extreme care not to kink the copper tube because it was already kinked when I got it. As I twisted the compressor, I made sure a different part of the hose bent instead of the kink and it seems to have worked out alright.
Left side of compressor. You can see the previous holes where it was mounted to the frame on the left.
Right side of compressor.
Now it opens like this so all my crap won't fall out when I open the door
The compressor does get extremely hot, especially when I let it run in the sun for a few hours. After a field test, I might enclose the compressor with some sheet metal and install a fan and vent to keep it cooler.
And for the power:
I ran it through a small cheap inverter (1500W peak) and measured 6 amp DC with about a 12 amp peak on startup. When the temperature switch turn off there is of course no power consumed. So with my two deep cycle I think I have 100 amp hours, this thing can run continuously (worst-case compressor on all the time) for 16 hours without a charge!
Next is a 240W solar panel with a SunSaver charge controller ($300 total). I found a very cheap dealer of solar panels in CO if anyone is interested.