RV Refrigerator

An RV refrigerator is a refrigerator that runs on propane, electric, or both. The “two-way” and “three-way” labels refer to which power sources work:

• Two-way: propane + 120V AC (shore power or generator)
• Three-way: propane + 120V AC + 12V DC (house battery)

Two technologies

Absorption refrigerators

Older technology (most rentals through ~2020). Uses a chemical absorption cycle with no moving parts. Runs on propane or electric.

Strengths:

• Silent (no compressor)
• Runs on propane indefinitely without electricity
• Reliable

Weaknesses:

• Cools slowly (12-24 hours to cool from warm)
• Doesn’t keep up at high outdoor temperatures (above 95°F)
• Requires the rig to be level for the absorption cycle to work
• Significantly more expensive to repair

12V DC compressor refrigerators

Modern technology (most premium Class B builds and newer rentals). Standard household-style compressor, runs on 12V DC from the house battery.

Strengths:

• Cools fast (4-6 hours from warm)
• Works at high outdoor temperatures
• Doesn’t care about levelness
• Easier to repair (standard refrigerator parts)

Weaknesses:

• Draws power from the house battery (~30-60 Ah/day)
• Requires solar or generator runtime for extended boondocking
• Audible compressor noise when running

Which you have in a rental

For most Class C and Class A rentals, the fridge is two-way absorption. For newer Class B builds, it’s typically 12V compressor.

Operating tips

For absorption fridges:

• Run on propane while driving — most rentals allow this. Some tunnels prohibit it.
• Cool overnight before loading — load cold, never load warm
• Level the rig — otherwise the absorption cycle stalls

For compressor fridges:

• No special requirements — they work like home fridges
• Monitor battery state during boondocking; the compressor is your biggest 12V load