Refrigerator & Freezer Runtime Calculator

Recommended minimum capacity ≈ (daily energy in Wh × days of outage) ÷ usable efficiency × (1 + reserve). Enter your refrigerator's running watts (or daily Wh), how many hours a day it effectively runs, and how many days you need it covered — the calculator below does the rest and shows which catalog products actually meet the requirement.

Anyone planning backup power for a refrigerator, freezer, or both during a grid outage — from a few hours of grocery protection to a multi-day event with partial solar recharge.

Load	Power (W)	Qty	Hrs/day	Surge (W)optional	Wh/day	Remove
					1,200

Days of outage (no recharge)1 dayDaily solar recharge (Wh, optional)Leave at 0 if you have no solar recharge. This is a planning estimate of your panel’s realistic daily output, not a guarantee of sun.

Calculation assumptions

Usable efficiency: 85%

Assumed usable share of nameplate capacity after inverter and conversion losses.

Reserve headroom: 20%

Extra capacity kept in reserve above the calculated requirement.

Hard requirements & preferences

I need to be able to add expansion batteries laterPrioritise low weight / portability

Recommended minimum capacity

1,694 Wh

= (1,200 Wh/day − 0 Wh/day solar × 1 day) ÷ 85% usable × (1 + 20% reserve)

Solar contributes an estimated 0 Wh/day, leaving a daily deficit of 1,200 Wh that the battery must supply. This is a planning estimate, not a guarantee of actual sun conditions.

Total daily energy: 1,200 Wh
Daily deficit after solar: 1,200 Wh
Required continuous output: 150 W
Required surge capability: 600 W

Why your real result may differ

These figures are planning estimates from the inputs and assumptions above — not a lab measurement. Your real result can vary with:

Temperature — cold reduces usable battery capacity; heat can trigger throttling
Battery age and condition — capacity fades gradually with cycles and time
Inverter efficiency — some energy is always lost converting DC to AC
Variable appliance draw — most appliances don't pull a constant wattage
Startup/surge power — a motor's brief startup spike can exceed its running watts
Appliance settings — e.g. humidifier, fan speed, or temperature setting
Conversion losses beyond the modeled efficiency assumption
Real solar conditions — actual panel output is usually well below its rated watts
The safety reserve is a margin for error, not a guarantee

How this is calculated

Recommended Power Stations

Compare your shortlist →

Every product in the catalog is classified against your requirement using the same engine as the Power Calculator: first compatibility (does it meet every hard requirement), then how proportionate it is to your need. Units that fail a hard requirement are shown as Not Suitable with the reason, rather than hidden — and units far larger than you need are labeled Oversized rather than presented as a top pick.

Illustrative image — not an exact product photograph.

Jackery

Explorer 2000 V2

2,042 Wh · 2,200 W rated · 39.5 lb (17.9 kg)

Good Fit

≈1.2× your recommended minimum capacity

Good

Estimated days from this unit's own capacity: 1.4 days

Capacity 2,042 Wh covers your recommended minimum of 1,694 Wh.
Rated output 2,200 W handles your 150 W continuous load.
Surge rating 4,400 W covers the estimated 600 W startup spike.

Check Price on Amazon

Price, availability and current rating are shown on Amazon — PowerMatchLab does not display them because we have not independently verified them. As an Amazon Associate we may earn from qualifying purchases.

Illustrative image — not an exact product photograph.

Anker SOLIX

C2000 Gen 2

2,048 Wh · 2,400 W rated · 41.7 lb (18.9 kg)

Good Fit

≈1.2× your recommended minimum capacity

Good

Estimated days from this unit's own capacity: 1.5 days

Capacity 2,048 Wh covers your recommended minimum of 1,694 Wh.
Rated output 2,400 W handles your 150 W continuous load.
Surge rating 4,000 W covers the estimated 600 W startup spike.

Check Price on Amazon

Illustrative image — not an exact product photograph.

EcoFlow

DELTA 2 Max

2,048 Wh · 2,400 W rated · 50.7 lb (23 kg)

Good Fit

≈1.2× your recommended minimum capacity

Good

Estimated days from this unit's own capacity: 1.5 days

Capacity 2,048 Wh covers your recommended minimum of 1,694 Wh.
Rated output 2,400 W handles your 150 W continuous load.
Surge rating 4,800 W covers the estimated 600 W startup spike.

Check Price on Amazon

Illustrative image — not an exact product photograph.

Pecron

E2400LFP

2,048 Wh · 2,400 W rated · 45.2 lb (20.5 kg)

Good Fit

≈1.2× your recommended minimum capacity

Good

Estimated days from this unit's own capacity: 1.5 days

Capacity 2,048 Wh covers your recommended minimum of 1,694 Wh.
Rated output 2,400 W handles your 150 W continuous load.
Surge rating 4,000 W covers the estimated 600 W startup spike.

Check Price on Amazon

Illustrative image — not an exact product photograph.

Anker SOLIX

S2000

2,010 Wh · 1,500 W rated · 35.7 lb (16.2 kg)

Good Fit

≈1.2× your recommended minimum capacity

Good

Estimated days from this unit's own capacity: 1.4 days

Capacity 2,010 Wh covers your recommended minimum of 1,694 Wh.
Rated output 1,500 W handles your 150 W continuous load.

Surge rating is not verified, so we cannot confirm it covers the estimated 600 W startup spike.

Check Price on Amazon

Illustrative image — not an exact product photograph.

BLUETTI

AC200L

2,048 Wh · 2,400 W rated · 62.4 lb (28.3 kg)

Good Fit

≈1.2× your recommended minimum capacity

Fair

Estimated days from this unit's own capacity: 1.5 days

Capacity 2,048 Wh covers your recommended minimum of 1,694 Wh.
Rated output 2,400 W handles your 150 W continuous load.
Surge rating 3,600 W covers the estimated 600 W startup spike.

Check Price on Amazon

Illustrative image — not an exact product photograph.

BLUETTI

Elite 300

3,014.4 Wh · 2,400 W rated · 58 lb (26.3 kg)

Good Fit

≈1.8× your recommended minimum capacity

Great

Estimated days from this unit's own capacity: 2.1 days

Capacity 3,014 Wh covers your recommended minimum of 1,694 Wh.
Rated output 2,400 W handles your 150 W continuous load.
Surge rating 4,800 W covers the estimated 600 W startup spike.

Check Price on Amazon

Illustrative image — not an exact product photograph.

Jackery

Explorer 2000 Plus

2,042.8 Wh · 3,000 W rated · 61.5 lb (27.9 kg)

Good Fit

≈1.2× your recommended minimum capacity

Good

Estimated days from this unit's own capacity: 1.4 days

Capacity 2,043 Wh covers your recommended minimum of 1,694 Wh.
Rated output 3,000 W handles your 150 W continuous load.
Surge rating 6,000 W covers the estimated 600 W startup spike.

Check Price on Amazon

Independent editorial illustration — not an official product photo.

Goal Zero

Yeti 1500 (6th Gen)

1,505 Wh · 2,000 W rated

Good Fit

≈0.9× your recommended minimum capacity

Not scored

Estimated days from this unit's own capacity: 1.1 days

Rated output 2,000 W handles your 150 W continuous load.
Surge rating 3,600 W covers the estimated 600 W startup spike.

Capacity 1,505 Wh covers the raw 1,412 Wh you need but leaves little reserve (recommended minimum 1,694 Wh).

Check Price on Amazon

Independent editorial illustration of the DJI Power 2000 — not an official manufacturer photograph.

Independent editorial illustration — not an official product photo.

DJI

Power 2000

2,048 Wh · 3,000 W rated

Good Fit

≈1.2× your recommended minimum capacity

Fair

Estimated days from this unit's own capacity: 1.5 days

Capacity 2,048 Wh covers your recommended minimum of 1,694 Wh.
Rated output 3,000 W handles your 150 W continuous load.

Surge rating is not verified, so we cannot confirm it covers the estimated 600 W startup spike.

Check Price on Amazon

Independent editorial illustration — not an official product photo.

Mango Power

E

3,500 Wh · 3,000 W rated · 100.1 lb (45.4 kg)

Good Fit

≈2.1× your recommended minimum capacity

Good

Estimated days from this unit's own capacity: 2.5 days

Capacity 3,500 Wh covers your recommended minimum of 1,694 Wh.
Rated output 3,000 W handles your 150 W continuous load.

Surge rating is not verified, so we cannot confirm it covers the estimated 600 W startup spike.

Check Price on Amazon

Oversized alternatives — larger than you need (7)

These fully meet your requirement but carry much more capacity or output than your calculation needs. They can still make sense for future growth, but they are not the proportionate pick.

Independent editorial illustration — not an official product photo.

BLUETTI

Apex 300

2,764.8 Wh · 3,840 W rated

Oversized

≈1.6× your recommended minimum — much more than needed

Good

Estimated days from this unit's own capacity: 2.0 days

Capacity 2,765 Wh covers your recommended minimum of 1,694 Wh.
Rated output 3,840 W handles your 150 W continuous load.
Surge rating 7,680 W covers the estimated 600 W startup spike.

Check Price on Amazon

Illustrative image — not an exact product photograph.

Pecron

E3600LFP

3,072 Wh · 3,600 W rated · 79.4 lb (36 kg)

Oversized

≈1.8× your recommended minimum — much more than needed

Good

Estimated days from this unit's own capacity: 2.2 days

Capacity 3,072 Wh covers your recommended minimum of 1,694 Wh.
Rated output 3,600 W handles your 150 W continuous load.
Surge rating 7,000 W covers the estimated 600 W startup spike.

Check Price on Amazon

Illustrative image — not an exact product photograph.

Anker SOLIX

F3000

3,072 Wh · 3,600 W rated · 91.5 lb (41.5 kg)

Oversized

≈1.8× your recommended minimum — much more than needed

Good

Estimated days from this unit's own capacity: 2.2 days

Capacity 3,072 Wh covers your recommended minimum of 1,694 Wh.
Rated output 3,600 W handles your 150 W continuous load.
Surge rating 7,200 W covers the estimated 600 W startup spike.

Check Price on Amazon

Illustrative image — not an exact product photograph.

EcoFlow

DELTA Pro 3

4,096 Wh · 4,000 W rated

Oversized

≈2.4× your recommended minimum — much more than needed

Great

Estimated days from this unit's own capacity: 2.9 days

Capacity 4,096 Wh covers your recommended minimum of 1,694 Wh.
Rated output 4,000 W handles your 150 W continuous load.
Surge rating 8,000 W covers the estimated 600 W startup spike.

Check Price on Amazon

Independent editorial illustration — not an official product photo.

Growatt

HELIOS 3600

3,686.4 Wh · 3,600 W rated

Oversized

≈2.2× your recommended minimum — much more than needed

Good

Estimated days from this unit's own capacity: 2.6 days

Capacity 3,686 Wh covers your recommended minimum of 1,694 Wh.
Rated output 3,600 W handles your 150 W continuous load.

Surge rating is not verified, so we cannot confirm it covers the estimated 600 W startup spike.

Check Price on Amazon

Illustrative image — not an exact product photograph.

Anker SOLIX

F3800

3,840 Wh · 6,000 W rated · 132.3 lb (60 kg)

Oversized

≈2.3× your recommended minimum — much more than needed

Good

Estimated days from this unit's own capacity: 2.7 days

Capacity 3,840 Wh covers your recommended minimum of 1,694 Wh.
Rated output 6,000 W handles your 150 W continuous load.
Surge rating 9,000 W covers the estimated 600 W startup spike.

Check Price on Amazon

Independent editorial illustration — not an official product photo.

EcoFlow

DELTA Pro Ultra

6,144 Wh · 7,200 W rated

Oversized

≈3.6× your recommended minimum — much more than needed

Excellent

Estimated days from this unit's own capacity: 4.4 days

Capacity 6,144 Wh covers your recommended minimum of 1,694 Wh.
Rated output 7,200 W handles your 150 W continuous load.
Surge rating 10,800 W covers the estimated 600 W startup spike.

Check Price on Amazon

Possible matches (2)

Independent editorial illustration — not an official product photo.

Jackery

Explorer 3000 v2

3,072 Wh · Not verified rated · 59.5 lb (27 kg)

Possible Match

Not scored

Estimated days from this unit's own capacity: 2.2 days

Capacity 3,072 Wh covers your recommended minimum of 1,694 Wh.

Rated continuous output is not verified for this unit.
Surge rating is not verified, so we cannot confirm it covers the estimated 600 W startup spike.

Check Price on Amazon

Independent editorial illustration — not an official product photo.

Jackery

Explorer 5000 Plus

5,040 Wh · Not verified rated · 134 lb (60.8 kg)

Possible Match

Great

Estimated days from this unit's own capacity: 3.6 days

Capacity 5,040 Wh covers your recommended minimum of 1,694 Wh.

Rated continuous output is not verified for this unit.
Surge rating is not verified, so we cannot confirm it covers the estimated 600 W startup spike.

Check Price on Amazon

Amazon option includes an Anderson extension cable

Not suitable for this requirement (19)

Independent editorial illustration — not an official product photo.

BLUETTI

AC70

768 Wh · 1,000 W rated · 22.5 lb (10.2 kg)

Not Suitable

Fair

Rated output 1,000 W handles your 150 W continuous load.
Surge rating 2,000 W covers the estimated 600 W startup spike.

Capacity 768 Wh is below the 1,412 Wh of usable energy your devices need.

Check Price on Amazon

Illustrative image — not an exact product photograph.

EcoFlow

RIVER 2 Pro

768 Wh · 800 W rated · 18.2 lb (8.3 kg)

Not Suitable

Fair

Rated output 800 W handles your 150 W continuous load.
Surge rating 1,600 W covers the estimated 600 W startup spike.

Capacity 768 Wh is below the 1,412 Wh of usable energy your devices need.

Check Price on Amazon

Illustrative image — not an exact product photograph.

VTOMAN

FlashSpeed 1000

828 Wh · 1,000 W rated · 37.4 lb (17 kg)

Not Suitable

Fair

Rated output 1,000 W handles your 150 W continuous load.
Surge rating 2,000 W covers the estimated 600 W startup spike.

Capacity 828 Wh is below the 1,412 Wh of usable energy your devices need.

Check Price on Amazon

Illustrative image — not an exact product photograph.

Jackery

Explorer 1000 V2

1,070 Wh · 1,500 W rated · 23.8 lb (10.8 kg)

Not Suitable

Fair

Rated output 1,500 W handles your 150 W continuous load.
Surge rating 3,000 W covers the estimated 600 W startup spike.

Capacity 1,070 Wh is below the 1,412 Wh of usable energy your devices need.

Check Price on Amazon

Independent editorial illustration — not an official product photo.

EcoFlow

RIVER 3 Plus

286 Wh · 600 W rated · 10.4 lb (4.7 kg)

Not Suitable

Fair

Rated output 600 W handles your 150 W continuous load.
Surge rating 1,200 W covers the estimated 600 W startup spike.

Capacity 286 Wh is below the 1,412 Wh of usable energy your devices need.

Check Price on Amazon

Independent editorial illustration — not an official product photo.

Jackery

Explorer 300 Plus

288 Wh · 300 W rated · 8.3 lb (3.8 kg)

Not Suitable

Fair

Rated output 300 W handles your 150 W continuous load.
Surge rating 600 W covers the estimated 600 W startup spike.

Capacity 288 Wh is below the 1,412 Wh of usable energy your devices need.

Check Price on Amazon

Illustrative image — not an exact product photograph.

EcoFlow

DELTA 3 Classic

1,024 Wh · 1,800 W rated · 26.7 lb (12.1 kg)

Not Suitable

Fair

Rated output 1,800 W handles your 150 W continuous load.
Surge rating 3,600 W covers the estimated 600 W startup spike.

Capacity 1,024 Wh is below the 1,412 Wh of usable energy your devices need.

Check Price on Amazon

Independent editorial illustration — not an official product photo.

BLUETTI

Elite 100 V2

1,024 Wh · 1,800 W rated · 25.4 lb (11.5 kg)

Not Suitable

Fair

Rated output 1,800 W handles your 150 W continuous load.
Surge rating 3,600 W covers the estimated 600 W startup spike.

Capacity 1,024 Wh is below the 1,412 Wh of usable energy your devices need.

Check Price on Amazon

Independent editorial illustration — not an official product photo.

EcoFlow

DELTA 3 Plus

1,024 Wh · 1,800 W rated

Not Suitable

Fair

Rated output 1,800 W handles your 150 W continuous load.
Surge rating 3,600 W covers the estimated 600 W startup spike.

Capacity 1,024 Wh is below the 1,412 Wh of usable energy your devices need.

Check Price on Amazon

Illustrative image — not an exact product photograph.

Anker SOLIX

C1000 Gen 2

1,024 Wh · 2,000 W rated

Not Suitable

Fair

Rated output 2,000 W handles your 150 W continuous load.
Surge rating 3,000 W covers the estimated 600 W startup spike.

Capacity 1,024 Wh is below the 1,412 Wh of usable energy your devices need.

Check Price on Amazon

Illustrative image — not an exact product photograph.

Segway

Cube 1000

1,024 Wh · 2,200 W rated · 35.7 lb (16.2 kg)

Not Suitable

Fair

Rated output 2,200 W handles your 150 W continuous load.
Surge rating 4,400 W covers the estimated 600 W startup spike.

Capacity 1,024 Wh is below the 1,412 Wh of usable energy your devices need.

Check Price on Amazon

Illustrative image — not an exact product photograph.

Anker SOLIX

C300

288 Wh · 300 W rated

Not Suitable

Not scored

Rated output 300 W handles your 150 W continuous load.
Surge rating 600 W covers the estimated 600 W startup spike.

Capacity 288 Wh is below the 1,412 Wh of usable energy your devices need.

Check Price on Amazon

Illustrative image — not an exact product photograph.

Goal Zero

Yeti 700

677 Wh · 600 W rated

Not Suitable

Not scored

Rated output 600 W handles your 150 W continuous load.
Surge rating 1,000 W covers the estimated 600 W startup spike.

Capacity 677 Wh is below the 1,412 Wh of usable energy your devices need.

Check Price on Amazon

Independent editorial illustration — not an official product photo.

Anker SOLIX

C800X

768 Wh · 1,200 W rated

Not Suitable

Not scored

Rated output 1,200 W handles your 150 W continuous load.
Surge rating 1,600 W covers the estimated 600 W startup spike.

Capacity 768 Wh is below the 1,412 Wh of usable energy your devices need.

Check Price on Amazon

Amazon bundle includes a 100W solar panel.

Independent editorial illustration of the DJI Power 500 — not an official manufacturer photograph.

Independent editorial illustration — not an official product photo.

DJI

Power 500

512 Wh · 1,000 W rated · 16.1 lb (7.3 kg)

Not Suitable

Fair

Rated output 1,000 W handles your 150 W continuous load.

Capacity 512 Wh is below the 1,412 Wh of usable energy your devices need.
Surge rating is not verified, so we cannot confirm it covers the estimated 600 W startup spike.

Check Price on Amazon

Illustrative image — not an exact product photograph.

BLUETTI

Elite 30 V2

288 Wh · 600 W rated · 9.5 lb (4.3 kg)

Not Suitable

Limited

Rated output 600 W handles your 150 W continuous load.

Capacity 288 Wh is below the 1,412 Wh of usable energy your devices need.
Surge rating is not verified, so we cannot confirm it covers the estimated 600 W startup spike.

Check Price on Amazon

Illustrative image — not an exact product photograph.

BLUETTI

AC180

1,152 Wh · 1,800 W rated · 35.3 lb (16 kg)

Not Suitable

Fair

Rated output 1,800 W handles your 150 W continuous load.

Capacity 1,152 Wh is below the 1,412 Wh of usable energy your devices need.
Surge rating is not verified, so we cannot confirm it covers the estimated 600 W startup spike.

Check Price on Amazon

Independent editorial illustration of the DJI Power 1000 V2 — not an official manufacturer photograph.

Independent editorial illustration — not an official product photo.

DJI

Power 1000 V2

1,024 Wh · Not verified rated · 31.3 lb (14.2 kg)

Not Suitable

Fair

Capacity 1,024 Wh is below the 1,412 Wh of usable energy your devices need.
Rated continuous output is not verified for this unit.
Surge rating is not verified, so we cannot confirm it covers the estimated 600 W startup spike.

Check Price on Amazon

Independent editorial illustration — not an official product photo.

Jackery

Explorer 500 v2

512 Wh · Not verified rated · 12.6 lb (5.7 kg)

Not Suitable

Not scored

Capacity 512 Wh is below the 1,412 Wh of usable energy your devices need.
Rated continuous output is not verified for this unit.
Surge rating is not verified, so we cannot confirm it covers the estimated 600 W startup spike.

Check Price on Amazon

Why these results?

Recommendations are deterministic: your required continuous output, capacity (with reserve) and estimated surge are compared against each unit’s manufacturer-published specs, then your stated hard requirements are applied. Nothing here is sponsored, and no score is invented to rank a product.

Formula

Daily energy (Wh) = running watts × equivalent hours/day. Recommended minimum capacity (Wh) = (daily energy × days) ÷ usable efficiency × (1 + reserve fraction). Required continuous output (W) must be at least the largest simultaneous running watts; required surge (W) must cover the startup spike of the compressor(s).

Why "equivalent hours per day", not 24

A refrigerator's compressor cycles on and off to hold temperature — it does not run continuously. "Equivalent hours per day" means the number of hours the compressor would need to run at its full running-watts figure to use the same total energy the unit actually uses over 24 hours.

This is why the presets below default to roughly 8 equivalent hours/day for a full-size refrigerator rather than 24 — a number pulled from a typical duty cycle, not a claim about your specific unit. If you know your fridge's actual daily kWh figure (from an EnergyGuide label or a plug-in meter), enter the equivalent Wh/day directly instead of estimating hours.

Why surge rating matters more for compressors

Compressor startup can briefly draw two to three times the running watts. A power station with plenty of continuous output but a low surge rating can still fail to start a refrigerator, especially if a freezer or second fridge is running at the same instant. Enter a real surge figure from the unit's nameplate if you have one — the calculator falls back to a conservative multiplier only when you don't.

How solar recharge changes the number

If you expect any solar recharge during the outage, enter a realistic daily Wh estimate (see the solar charging guide linked below for how to estimate that). The calculator treats it as reducing the energy the battery must supply each day, not as reducing the instantaneous power the station must deliver.

Common mistakes

Using 24 hours/day instead of the compressor's actual duty cycle, which overstates daily energy by 2-3×.
Ignoring startup surge entirely, then finding the station won't start the compressor even though its continuous rating looked sufficient.
Treating a manufacturer's nameplate wattage (a legal maximum) as the average running draw, which is usually lower.
Assuming solar guarantees a fixed daily output regardless of weather — treat any solar figure here as a planning estimate.

Related guides

FAQ

How many watts does a refrigerator actually use?

It varies widely by size, age and efficiency — commonly 100-200 W running for a full-size unit, with startup surge 2-3× higher. Check your unit's own rating label, EnergyGuide sticker, or measure it with a plug-in energy meter for a real figure rather than relying on the presets.

Can one power station run both a fridge and a freezer?

It depends on combined continuous output and worst-case surge. Add both as separate rows below (each with its own real watts and surge) so the calculator sums continuous demand and takes the largest single surge on top — then check the recommended products against that combined requirement.

Does keeping the door closed change the calculation?

Keeping doors closed reduces how often the compressor needs to run to maintain temperature, which is exactly what "equivalent hours per day" is trying to estimate — but this calculator can't measure your actual usage pattern, so treat the hours field as your own best estimate or a metered reading.

Sources

PowerMatchLab's own Power Calculator methodology (same formulas, see About & Methodology)

Last updated September 11, 2026. This tool performs calculations from the numbers you enter — it does not measure, test or guarantee real-world performance. See About & Methodology.