What size power station for an upright freezer?
It needs a station with at least 300 W of continuous output and a surge rating of at least 750 W to start it. At the default 85% efficiency it takes about 471 Wh of rated capacity for 8 hours of running, and 1,412 Wh for 24 hours of running. 49 of the 54 power stations in the Enough Watts data set can power it. The smallest one that keeps it going for 24 hours of running is the Goal Zero Yeti 1500 (1,505 Wh).
Updated
The short answer
300W
Continuous output
750W
Surge to start it
471Wh
Capacity for 8 hours of running
1,412Wh
Capacity for 24 hours of running
49 of 54
Stations that power it
Watts
Typical figures for this type, from the sources at the foot of this page. Watts vary by model and age. Check the label on your own appliance and enter it for an exact answer.
- Running, typical
- 300 W
- Running, low to high
- 100 W to 500 W
- Starting
- 750 W500 W to 1,000 W, 2.5 times running
- Energy per day
- 1.2 kWh1.04 to 1.45 kWh; the compressor cycles on and off
- Typical use a day
- 24 hthe calculator starts from this, and you can change it
- Average draw while on
- 50 W
- Voltage
- 120 V
Explained in: Watts vs watt hours, explained, How to read an appliance label for watts, Starting watts explained and Can a power station run a refrigerator?.
The math
Worked with the typical figure, as the calculator does it.
- Output300 W running, so the station's continuous output must be at least 300 W.
- Surge750 W to start, so its surge rating must be at least 750 W.
- Average draw1.2 kWh a day × 1,000 ÷ 24 h = 50 W, because it cycles on and off.
- A typical day50 W × 24 h = 1,200 Wh a day.
- 8 hours of running50 W × 8 h = 400 Wh usable, ÷ 0.85 = 471 Wh of rated capacity.
- 24 hours of running50 W × 24 h = 1,200 Wh usable, ÷ 0.85 = 1,412 Wh of rated capacity.
- On the Goal Zero Yeti 15001,505 Wh × 0.85 = 1,279 Wh usable, ÷ 50 W = 25.6 h.
Stations that run it
Every power station in the data with this appliance alone plugged in, at 85% efficiency. Type the running watts from your own label and the table works it out again.
What moves the number
Daily energy sets the runtime: 1.2 kWh for a typical certified upright, 1.04 to 1.45 kWh across them, with frost free and larger models at the top. The typical upright in our data uses more a day than the typical chest freezer.
A full freezer stays frozen for about 48 hours with the door shut.
Questions
How many watts does an upright freezer use?
Can a portable power station run an upright freezer?
How long will a power station run an upright freezer?
Why does an upright freezer need a high surge rating?
Sources
Researched from these pages, then checked against them a second time. The check corrected at least one figure.
- Generator Wattage Chart: Common Appliances & Tools - Champion Power Equipment generator maker guide, checked
- ENERGY STAR Certified Residential Freezers (data.energystar.gov dataset 8t9c-g3tn) government, checked
- ENERGY STAR Flip Your Fridge Calculator data script (Use of Existing kWh/year by configuration, age and size) government, checked
We read published figures and do the math; we do not measure appliances. The methodology states every formula on this page. Capacities are rated watt hours: 1,000 Wh rated gives 850 Wh usable at the default.