Originally Posted by markb5900
Your fridge works off propane when not plugged into shore power and 120v when you’re plugged in.
Bad assumption, Mark! Everyone's trailer is not like your trailer.
The OP's trailer is a 2023 Salem Cruise Kite 240BHXL. The refrigerator is an EverChill BGC-46. That refrigerator happens to be (as the OP surmised) 120Vac only. It DOES NOT work off propane. The OP could run it from an inverter--not sure whether his trailer comes with one or not.
That refrigerator draws 0.8 amps at 120 Vac. If it were run from an inverter, it would draw 8 amps (or a little more) from the 12Vdc battery.
A typical trailer flooded Lead-acid battery has 60 amp-hours usable. So let's say that the refrigerator runs only 1/3 of the time. That means that in a day, the refrigerator would consume 8 amps x 1/3 x 24 hours = 64 amp-hours. That means that the refrigerator will drain a full battery down to the safe point (50 % charge) in a day. If the OP is planning to dry-camp, he can:
- Not use the outside refrigerator
- Add another lead-acid battery to extend the trips to two days
- Invest in Lithium batteries which have about double the usable charge.
- Invest in enough solar to recharge the battery(s) and hope for sunny days.
- Bring a generator to recharge the battery each day