ajriding wrote:
3-way is for dummies, and is a selling point for newbies who don't know anything yet. It is not bad to have the DC option, but just not very important in the scheme of things. Don't fret getting a 2-way. Running the fridge heating element on DC power has no advantages and is not useful unless some emergency, like u run out of propane... Running on DC will kill batteries, and running on DC while driving will be hard on the vehicle alternator, which is also expensive, and for non-do-it-yourselfers expensive to have replaced. Running DC off solar would work if you have a roof full of panels which is way more expensive than a little bit of propane...
2-way is all I would ever want. Run it on propane while driving and parked, on AC when plugged in, and never on DC if at all possible...
I beg you to differ.
Not only as mentioned above- running on 12V having solar makes lot of sense, but I used my old TC fridge in my Sprinter van conversion with no propane.
Van has 250 amp alternator, dual AC and 4-cylinder engine can idle using 1/4 gallon of diesel per hr.
So the idea is to use van engine as generator.
Beside, 12V element, depends on fridge takes 10-20 amp, so it can run 2-4 hr on single battery (good for lunch stops).
But bare in mind that 12V elements are having smaller output than other ways. Driving often in 120F, occasionally I switch on inverter and run fridge on 120V mode.