...The only thing that I wonder about is the durability of a residential refer in a shaky/bumpy trailer for an extended period of time. I spoke with the mfg of ours (Fridigidare) and they said it wouldn't be a problem. We shall see down the road.
Residential refers have been used on motorhomes for many years. In 5th wheels, I believe they've been used maybe 10 years or less.
My personal experience is that while there are pros and cons, on balance, I really like them. We are not boondockers, so they work out well for us.
This all said, you CAN load too much in the refer and cause issues with durabiity. In my 2013 produced Frigidaire, shelving is supported in 2 ways. The upper shelves are supported by a wall track at the back of the case. Really sturdy. The lower shelves have drawers integrated below them. This means the weight of what's in the drawer and what's on the shelf, both add to the support system. In the case of these lower shelves, they are supported by plastic clips/pins that are pressed into the side of the case.
I have 2 broken clips. Only had one broken at first, so I ordered a replacement and a spare (Amazon.com). By the time my order arrived, I noticed a second clip had broken. I plan to replace them both this week.
In our bottom drawer, we load it completely full of bottled water. That's a LOT of weight, combined with the weight of what we store on the shelf above the drawer. Left side, front pin broken.
In our top drawer, we load it completely full with canned beverages. Here again, a LOT of weight, combined with the weight of what we store on the shelf above the drawer. Left side, front pin broken.
In our middle drawer, we store cheeses, fruits and veggies. Not as heavy and no broken pins.
I'll be posting the repair process for the shelf pins for my model of Frigidaire refer. My next coach will have an updated Frigidaire refer. I'm unsure as to any changes in how the shelving/drawers are supported.
So what can one do to guard against these pins breaking? Some ideas:
1. Load the shelving/drawers more lightly
2. Drive slower to introduce less moment weight (is that a real term?) on the shelving from road forces (pot holes, bridge abutments etc)
3. Use a better pinbox (other than a standard pinbox) like a Mor/ryde, Trailair, and others
4. Consider suspension upgrades like Joy Rider Shock System, Mor/ryde IS, Trailair Centerpoint, and others
5. Devise a refer shelf pin support system that can be installed on both sides of the refer case, front and rear
The above thoughts are my personal thoughts based on my own experience and are not the thoughts, views or suggestions of Heartand RVs.