OhSix· Premium Member
At 170 watts/12V DC, your fridge is putting a 14.5 AMP load on the electrical system in your trailer. That's frigging HUGE. Adding a 14 AMP load to your RL electrical system is completely unnecessary and taxes the alternator with a continuous load. Converting DC to AC only exacerbates the demand on your system(s) - inverters are notoriously inefficient. For the most part, IMO: the only thing an inverter is needed for is to temporarily power something that can't be connected to a 12-14 VDC source like a microwave or coffee maker. And when an inverter is used, it's only for very short durations - even an unloaded inverter is an current EATER on a DC system.Would it be possible to run a small RV refrigerator while towing the travel trailer that the refrigerator is in? My Ridgeline's alternator/7 pin connector wiring apparently can't handle it. The RV 12 volt battery drains completely on long trips. This refrigerator only pulls about 175 watts. The Ridgeline's invertor should be able to handle it. This is a Dometic refr. that can run on 12 volt, 120 volts, or propane.
On the flip side, your Dometic fridge likely sips around 1/2 ounce of propane per hour.
In my coach, I precool the fridge and freezer for a day or two using shore power prior to a trip, then before departing, switch to propane for the duration of travel time. The choice of continuing to use propane upon arrival is purely a function of the camp site and your propane storage capacity.
I typically run the fridge on propane during an entire camping trip and still have plenty of fuel for BBQ, cook top burners and occasional heat when it gets cold. An 800 watt solar panel keeps 2 pair of Trojan deep cycle 105's charged when I'm rolling down the road. When camped, the DC system powers a substantial stereo system & TV during the day, while running lights and sound most of the night. I rarely camp in places with hook ups but have dry camped for 10 days at a time without hooking up to a generator. That simply wouldn't be possible powering the fridge via DC or an inverter.
Although I do carry a Honda EU 2000 generator for just in case.
I recommend staying as far away from DC to AC inverters as is practical for your situation. Use the RL electrical system strictly to keep the coach batteries peaked while being towed, run you fridge on propane always and get yourself a Honda EU 2000. That little generator is amazingly quiet, is super fuel efficient, is great for all around camping and can make all the difference during home emergencies.