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The Dometic CFX5 45 is a 45-liter compressor cooler that can refrigerate or freeze without ice. It runs from AC or 12/24-volt DC power and includes battery-protection settings, making it relevant to RVers who need portable cold storage beyond the built-in refrigerator.
Official specifications and features
| Capacity | 45 liters; Dometic says up to 67 standard 12-ounce cans |
|---|---|
| Temperature range | -7°F to 68°F (-22°C to 20°C) |
| Power inputs | 110–240V AC and 12/24V DC |
| Power use claim | Less than a 60W light bulb under the manufacturer’s stated comparison |
| Battery protection | 3-stage dynamic protection system |
| Monitoring | Bluetooth app with temperature and energy information |
Where it fits in an RV setup
The CFX5 45 can serve as overflow refrigeration, a dedicated freezer, or a vehicle cooler for travel days. Unlike an ice chest, the usable interior is not gradually consumed by melting ice and wet food. Unlike a thermoelectric cooler, a compressor model can target a set temperature across a wide range of ambient conditions.
The 45-liter size is a middle ground: substantial enough for several days of food or drinks while remaining portable in concept. Before buying, measure the location with clearance for the lid, ventilation and cable connections. The nominal capacity does not tell you whether the cooler will clear a pickup-bed cover or fit through an RV compartment opening.
Power planning matters
The DC input is convenient, but no cooler should be connected to a starter battery without understanding the cutoff settings and the vehicle’s wiring. Dometic’s three-stage protection can reduce the chance of excessive battery discharge; it cannot compensate for an undersized battery bank, poor wiring or an inappropriate setting.
For off-grid use, estimate daily watt-hours under your actual temperatures and opening habits. Compressor coolers cycle rather than draw maximum power continuously, so consumption varies with ambient heat, setpoint, ventilation, contents and how often the lid opens. Solar is a system decision involving panels, controller, battery storage and weather—not simply a cooler accessory.
CFX5 versus the older CFX3
Dometic now positions the CFX5 as the current generation. Older CFX3 45 stock may still appear at retailers, so read the full model name instead of relying on a similar photo. The CFX5 adds Dometic’s newer insulation and compressor design claims; the older model may still make sense only if its condition, warranty and price justify choosing discontinued inventory.
Who should buy it
- RVers who need a reliable second refrigerator or freezer.
- Travelers who want cold storage in a tow vehicle or outdoor kitchen.
- Off-grid campers with a measured battery and charging plan.
- Users who value app monitoring but can still operate the cooler directly.
Who should skip it
If you camp only with hookups and have adequate built-in refrigeration, a premium portable unit may add cost and cargo weight without solving a problem. If you mainly need drinks cold for a day, an insulated ice chest can be simpler. Buyers who need separate refrigerator and freezer temperatures should compare dual-zone models instead of assuming one compartment can maintain two setpoints.
Our buying take
The CFX5 45 is compelling when mobility, precise cooling and off-grid efficiency are priorities. The smartest purchase starts with three measurements: physical space, required food volume and available watt-hours. If all three align, it can be far more useful than managing ice on a long trip.