12V fridgeGuide
12V fridge power consumption: how much each Dometic CFX3 uses in a day
Daily energy use for six Dometic CFX3 12V fridges from Dometic's published figures, what the freezer and ice maker settings add, and how that turns into hours on a power station.
Last updated
- 1 power station
- 6 devices
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If you’re sizing a battery for a 12V fridge, the number you want is how much energy it uses in a day. The wattage on the label tells you what it pulls while the compressor runs, but a fridge spends a good part of the day with the compressor off, and daily use is what empties the battery.
Dometic publishes an average current draw for each CFX3 at its test conditions. We multiply that by the nominal 12V and by a full day to get watt-hours per day. These are Dometic’s figures, converted. We haven’t measured any of these fridges ourselves.
How to read the tables
Each model below gets a small table on one reference station, the EcoFlow DELTA 2 (1,024 Wh). The daily figure is in the note under each table, where it says “Average load from … Wh per day”. The hours in the table are what that daily use means on a station of that size, so you can compare models directly: more hours means less energy per day.
What the figures show
Consumption goes up with size, which is no surprise. The steps between the single-zone models are small, though. Going from the Dometic CFX3 25 to the Dometic CFX3 45 adds only a little to the daily use. If you’re torn between two sizes, the battery isn’t a strong reason to go smaller.
The real jump is the freezer. On the dual-zone Dometic CFX3 75DZ, setting the small zone to freezer more than doubles the daily use, and on the Dometic CFX3 95DZ it nearly doubles it. The ice maker on the Dometic CFX3 55IM is mild by comparison.
All of Dometic’s figures come from the same kind of hot-day test. Dometic’s pages for the 25 and 35 state it in Fahrenheit and the others in Celsius, but the conditions match near enough. The Mode column shows each one as published.
By model
Dometic CFX3 25
The lightest on the battery of the six.
The Dometic CFX3 25 runs on AC power for 79.0 hours and on 12V DC for 83.5 hours, depending on the power station and mode.
| Power station | Rated capacity (Wh) | Mode | Power path | Runtime (hours) |
|---|---|---|---|---|
| EcoFlow DELTA 2 | 1,024rated spec | 12 V, 90 F ambient, 39 F internal | AC | 79.0calculatedsurge unverified: Startup surge not specified |
| EcoFlow DELTA 2 | 1,024rated spec | 12 V, 90 F ambient, 39 F internal | 12V DC | 83.5calculatedsurge unverified: Startup surge not specified |
Last updated 2026-11-13. Bars are scaled to the longest runtime in this table. Assumptions: AC efficiency 85% assumed; Average load from 265 Wh per day ÷ 24; 12V DC efficiency 90% assumed. How we calculate runtime
Dometic CFX3 35
The Dometic CFX3 35 runs on AC power for 74.0 hours and on 12V DC for 78.5 hours, depending on the power station and mode.
| Power station | Rated capacity (Wh) | Mode | Power path | Runtime (hours) |
|---|---|---|---|---|
| EcoFlow DELTA 2 | 1,024rated spec | 12 V, 90 F ambient, 39 F internal | AC | 74.0calculatedsurge unverified: Startup surge not specified |
| EcoFlow DELTA 2 | 1,024rated spec | 12 V, 90 F ambient, 39 F internal | 12V DC | 78.5calculatedsurge unverified: Startup surge not specified |
Last updated 2026-11-13. Bars are scaled to the longest runtime in this table. Assumptions: AC efficiency 85% assumed; Average load from 282 Wh per day ÷ 24; 12V DC efficiency 90% assumed. How we calculate runtime
Dometic CFX3 45
The Dometic CFX3 45 runs on AC power for 70.5 hours and on 12V DC for 74.5 hours, depending on the power station and mode.
| Power station | Rated capacity (Wh) | Mode | Power path | Runtime (hours) |
|---|---|---|---|---|
| EcoFlow DELTA 2 | 1,024rated spec | 12 V, 32 C ambient, 4 C internal | AC | 70.5calculatedsurge unverified: Startup surge not specified |
| EcoFlow DELTA 2 | 1,024rated spec | 12 V, 32 C ambient, 4 C internal | 12V DC | 74.5calculatedsurge unverified: Startup surge not specified |
Last updated 2026-11-13. Bars are scaled to the longest runtime in this table. Assumptions: AC efficiency 85% assumed; Average load from 297 Wh per day ÷ 24; 12V DC efficiency 90% assumed. How we calculate runtime
Dometic CFX3 55IM
Two figures from Dometic: normal running, and with the ice maker on in maintenance mode.
The Dometic CFX3 55IM runs on AC power for 60.5 to 65.5 hours and on 12V DC for 64.0 to 69.0 hours, depending on the power station and mode.
| Power station | Rated capacity (Wh) | Mode | Power path | Runtime (hours) |
|---|---|---|---|---|
| EcoFlow DELTA 2 | 1,024rated spec | 12 V, 32 C ambient, 4 C internal | AC | 65.5calculatedsurge unverified: Startup surge not specified |
| EcoFlow DELTA 2 | 1,024rated spec | 12 V, 32 C ambient, 4 C internal | 12V DC | 69.0calculatedsurge unverified: Startup surge not specified |
| EcoFlow DELTA 2 | 1,024rated spec | 12 V, 32 C ambient, 4 C internal, ice maker on (maintenance) | AC | 60.5calculatedsurge unverified: Startup surge not specified |
| EcoFlow DELTA 2 | 1,024rated spec | 12 V, 32 C ambient, 4 C internal, ice maker on (maintenance) | 12V DC | 64.0calculatedsurge unverified: Startup surge not specified |
Last updated 2026-11-13. Bars are scaled to the longest runtime in this table. Assumptions: AC efficiency 85% assumed; Average load from 320 Wh per day ÷ 24; 12V DC efficiency 90% assumed; Average load from 346 Wh per day ÷ 24. How we calculate runtime
Dometic CFX3 75DZ
Two figures: both zones as fridges, and the small zone as a freezer.
The Dometic CFX3 75DZ runs on AC power for 24.0 to 50.5 hours and on 12V DC for 25.0 to 53.5 hours, depending on the power station and mode.
| Power station | Rated capacity (Wh) | Mode | Power path | Runtime (hours) |
|---|---|---|---|---|
| EcoFlow DELTA 2 | 1,024rated spec | 12 V, 32 C ambient, 4 C internal | AC | 50.5calculatedsurge unverified: Startup surge not specified |
| EcoFlow DELTA 2 | 1,024rated spec | 12 V, 32 C ambient, 4 C internal | 12V DC | 53.5calculatedsurge unverified: Startup surge not specified |
| EcoFlow DELTA 2 | 1,024rated spec | 12 V, 32 C ambient, large zone 4 C, small zone -15 C | AC | 24.0calculatedsurge unverified: Startup surge not specified |
| EcoFlow DELTA 2 | 1,024rated spec | 12 V, 32 C ambient, large zone 4 C, small zone -15 C | 12V DC | 25.0calculatedsurge unverified: Startup surge not specified |
Last updated 2026-11-13. Bars are scaled to the longest runtime in this table. Assumptions: AC efficiency 85% assumed; Average load from 412 Wh per day ÷ 24; 12V DC efficiency 90% assumed; Average load from 876 Wh per day ÷ 24. How we calculate runtime
Dometic CFX3 95DZ
The biggest daily use of the six. Its rated DC input current is also above the 10 A car port on the station, which is why the 12V rows say it won’t run. Our 12V fridge runtime page explains what that means in practice.
The Dometic CFX3 95DZ runs on AC power for 22.0 to 40.0 hours, depending on the power station and mode.
| Power station | Rated capacity (Wh) | Mode | Power path | Runtime (hours) |
|---|---|---|---|---|
| EcoFlow DELTA 2 | 1,024rated spec | 12 V, 32 C ambient, 4 C internal | AC | 40.0calculatedsurge unverified: Startup surge not specified |
| EcoFlow DELTA 2 | 1,024rated spec | 12 V, 32 C ambient, 4 C internal | 12V DC | Won't run (Draws 10.4 A at 12V, port limit is 10 A) |
| EcoFlow DELTA 2 | 1,024rated spec | 12 V, 32 C ambient, large zone 4 C, small zone -15 C | AC | 22.0calculatedsurge unverified: Startup surge not specified |
| EcoFlow DELTA 2 | 1,024rated spec | 12 V, 32 C ambient, large zone 4 C, small zone -15 C | 12V DC | Won't run (Draws 10.4 A at 12V, port limit is 10 A) |
Last updated 2026-11-13. Bars are scaled to the longest runtime in this table. Assumptions: AC efficiency 85% assumed; Average load from 521 Wh per day ÷ 24; Average load from 948 Wh per day ÷ 24. How we calculate runtime
Your fridge won’t match these exactly
A published daily figure is a starting point. Lid openings, warm food going in, a colder set point and poor ventilation around the compressor all add to it, and cooler weather takes some away. For runtime on other stations, see the 12V fridge runtime tables or try the runtime calculator.