A 24-hour refrigerator backup plan

A 24-hour plan asks a narrow question: under stated assumptions, how many watt-hours cover one day of the average draw you entered? It does not ask whether the compressor will start, whether the door stayed shut, or whether the food is still safe to eat.

Federal outage guidance treats an unopened refrigerator as a matter of a few hours, not a full day. A battery sized for 24 hours of average energy is not a substitute for that temperature guidance. Read the food-safety page beside any runtime.

Illustration: 500 kWh per year

This is not your refrigerator unless its EnergyGuide figure really is 500 kWh/year. Average draw is 57.0776 W. Adding the 10 W idle allowance makes the AC-equivalent load 67.0776 W. Minimum capacity for 24 hours is 2,104.4 Wh.

On that illustration, every catalog battery is at or under a day. At one decimal, the DELTA 3 Max plans for 23.4 hours and the Explorer 2000 v2 plans for 23.3 hours. Both are short of a full 24-hour target. The smaller models are shorter still. Change the annual kWh and the picture changes. Use the calculator with 24 hours selected.

24-hour illustration at 500 kWh per year.
Model	Capacity	Continuous	Published surge	Planning result	Source check	Link
EcoFlow DELTA 3 Plus	1,024 Wh	1,800 W	3,600 W	Shortfall: 1,080.4 Wh below the planning minimum. Planning runtime 11.7 hours.	Spec block matched 1,024 Wh, 1,800 W total, and 3,600 W surge. The same page also describes an X-Boost figure of 2,200 W, which is not the continuous rating used here. Capacity: The specifications block included “1024 Wh.”	Manufacturer information (opens in a new tab)
Jackery Explorer 1000 v2	1,070 Wh	1,500 W	3,000 W	Shortfall: 1,034.4 Wh below the planning minimum. Planning runtime 12.2 hours.	A specifications row matched 1,070 Wh, 1,500 W rated, and 3,000 W surge. A description sentence on the same page says 1,024 Wh. This site did not replace 1,070 Wh. Capacity: The page included “30.4Ah/35.2V DC (1070 Wh)” and data-capacity 1070. The product description also says “Delivers 1024Wh Capacity and 1500W Output.”	Manufacturer information (opens in a new tab)
Jackery Explorer 2000 v2	2,042 Wh	2,200 W	4,400 W	Shortfall: 62.4 Wh below the planning minimum. Planning runtime 23.3 hours.	Official text matched 2,042 Wh, 2,200 W continuous, and 4,400 W surge. The manufacturer’s refrigerator wording on that page is not a test by this site. Capacity: The page title included 2042Wh, and the description included 2042Wh of capacity.	Manufacturer information (opens in a new tab)
EcoFlow DELTA 3 Max	2,048 Wh	2,400 W	4,800 W	Shortfall: 56.4 Wh below the planning minimum. Planning runtime 23.4 hours.	Official text matched 2,048 Wh, 2,400 W output, and 4,800 W surge. An X-Boost mention of appliances up to 3,400 W is not used as the continuous or surge rating. Capacity: The meta description included 2048Wh capacity.	Manufacturer information (opens in a new tab)

Model

Capacity

Continuous

Published surge

Planning result

Source check

Link

EcoFlow DELTA 3 Plus

1,024 Wh

1,800 W

3,600 W

Shortfall: 1,080.4 Wh below the planning minimum. Planning runtime 11.7 hours.

Spec block matched 1,024 Wh, 1,800 W total, and 3,600 W surge. The same page also describes an X-Boost figure of 2,200 W, which is not the continuous rating used here.

Capacity: The specifications block included “1024 Wh.”

Manufacturer information

Jackery Explorer 1000 v2

1,070 Wh

1,500 W

3,000 W

Shortfall: 1,034.4 Wh below the planning minimum. Planning runtime 12.2 hours.

A specifications row matched 1,070 Wh, 1,500 W rated, and 3,000 W surge. A description sentence on the same page says 1,024 Wh. This site did not replace 1,070 Wh.

Capacity: The page included “30.4Ah/35.2V DC (1070 Wh)” and data-capacity 1070. The product description also says “Delivers 1024Wh Capacity and 1500W Output.”

Manufacturer information

Jackery Explorer 2000 v2

2,042 Wh

2,200 W

4,400 W

Shortfall: 62.4 Wh below the planning minimum. Planning runtime 23.3 hours.

Official text matched 2,042 Wh, 2,200 W continuous, and 4,400 W surge. The manufacturer’s refrigerator wording on that page is not a test by this site.

Capacity: The page title included 2042Wh, and the description included 2042Wh of capacity.

Manufacturer information

EcoFlow DELTA 3 Max

2,048 Wh

2,400 W

4,800 W

Shortfall: 56.4 Wh below the planning minimum. Planning runtime 23.4 hours.

Official text matched 2,048 Wh, 2,400 W output, and 4,800 W surge. An X-Boost mention of appliances up to 3,400 W is not used as the continuous or surge rating.

Capacity: The meta description included 2048Wh capacity.

Manufacturer information

What to bring to the calculator

Prefer the EnergyGuide yearly kWh, or a meter that averaged at least a day of normal door openings. A nameplate running wattage without a duty cycle will overstate the average if you treat it as continuous. Startup watts, if a manual or a qualified measurement gives them, belong in the optional field. Unknown startup stays unconfirmed.

For a two-day target, the same average needs roughly twice the energy, plus the same idle draw. See the 48-hour plan.