I have had Dometic Americana II Refrigerators in 2 out of the 3 coaches we have owned. They are 2-way (120VAC & LP) and yes I run the propane on when going down the road (20+years). Only time that I have turned it off is if we are going to go thru any tunnels or use a ferry. As per Leon at National RV Refrig. I turn mine on in the spring and turn it off in the fall and maybe one in the middle of the summer to defrost. There were several years that it never got turned off as we basically used the coach year round when we went to FL & AZ for the winter.
The Avion that we own is getting a 120VAC Refrigerator with its own inverter(2000W) and 4 golf carts batteries. I have tested before we took it out and it really doesn’t run that often and we don’t make a habit of opening that much when driving down the road and we can also run the generator is need be.
There are 2-way & 3-way Refrigerators that one of the power sources was 12VDC. Note here that the majority if not all RV refrigerators require a 12VDC circuit to operate the controls.
National RV Refrigeration in Shipshewana, IN is a known expert on RV and LP refrigerators. If you want to convert you can call them 260 768-7059. Ask for Leon. Also has a good site.
WWW.fixyourfridge.com
J.R. Wright
GMC Great Laker MHC
GMCGL Tech Editor
GMC Eastern States Charter Member
GMCMI
78 GMC Buskirk 29.5’ Stretch
75 GMC Avion (Under Reconstruction)
Michigan
>
> The most expensive RV rigs can handle an electric load on the solar panel system. They have a lot of roof for more panels to create the needed power.
> Most of those units also carry a large number of batteries to support the extra load needed for the large refrigerators.
>
> The GMC does not have a lot of roof to offer space for excess solar panels. Thats not to say it cant be done but then the GMC does not have a lot of
> space for the amount of batteries needed for the storage of the power from the panels.
>
> 3 way RV friges came with the thought that Propane is used when camping with no outside hookups. When traveling, you would shut down the propane and
> run on the 12vdc power. You are fine with the engine running but when you stop you must not run on 12vdc because the heater will drain the battery.
> When hooked up to shore power the 120vac runs the frige just fine. Either the 120vac to the frige itself or your charging system for the coach
> batteries usually can handle the load with no problem.
>
> The old original GMCs used electric motors on the friges. It was old tech and I am guessing was used for travel mode. Most of my reading indicated
> that the GMC Motorhomes were not intended for more than a couple days use and camping does not come up often in the ads.
>
> Today the technology is getting better, though I think the friges still need to work on more efficiency.
> The Shop in Indiana can repair your frige or convert it to an electric (with a motor). The power used is said to be low, I thought I read abour 3 amp
> start and lower running load, would have to check that out. There is a you tube vid that shows the conversion unit and the installation.
>
>
https://www.youtube.com/watch?v=Yte1V3CkDrw
>
> conversion back to the original amonia/water system can also be accomplished.
>
> Most of those that live in their RVs use smaller electric (motor type system) chests with their solar arrays and get by just fine. No propane used
> for frige at all.
>
> This is one of those subjects that you really have to go out and do research, especially if you are planning to buy a new frige, you have to have the
> right RV, the right solar power system, battery supply for an electric, otherwise a 3 way may be the choice to go.
>
> slc
>
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