Mini Fridge Running Cost: What Certified Data Shows

The median ENERGY STAR certified compact ("mini") refrigerator uses 245 kWh a year — about $46 a year to run at the U.S. average electricity rate. That’s roughly half what a median full-size refrigerator costs to run ($87/yr), but the cheapest certified compact models run far below even that: the Fisher & Paykel RS2435V2 is certified at just 42 kWh a year, about $8.

The certified data in short:

• Compact median: 245 kWh/yr (~$46/yr) vs. a full-size median of 463 kWh/yr (~$87/yr).
• 1,673 of 4,229 certified refrigerator models (about 40%) are compact.
• Cheapest certified compact model: Fisher & Paykel RS2435V2, 42 kWh/yr (~$8/yr).
• Priciest certified compact model: Marvel MPRI*24-SS*1A, 470 kWh/yr (~$88/yr) — as much as many full-size refrigerators.

What counts as a "compact" refrigerator in this data

ENERGY STAR certifies compact refrigerators as their own product category, separate from full-size units — the same lab test procedure applies, just to smaller-capacity models typically used in dorms, offices, garages, wet bars, and RVs. WattCost’s data has 1,673 certified compact models out of 4,229 certified refrigerators overall.

How much does a mini fridge actually cost to run?

At the U.S. average electricity rate of 18.83¢/kWh (EIA, April 2026):

• Compact refrigerators — median 245 kWh/yr ($46.13/yr), average 251 kWh/yr ($47.24/yr).
• Full-size refrigerators — median 463 kWh/yr ($87.18/yr), average 478 kWh/yr ($89.98/yr).

The range inside "compact" is wide, though — the cheapest certified model, the Fisher & Paykel RS2435V2, uses just 42 kWh a year, while the priciest, the Marvel MPRI*24-SS*1A, uses 470 kWh a year — nearly matching a median full-size refrigerator. "Compact" describes the size, not automatically the running cost; check the specific model’s certified kWh figure before assuming.

Which brands make compact refrigerators

By certified model count, the brands with the largest compact lineups are:

• Frigidaire — 135 certified models
• Magic Chef — 101 certified models
• upstreman — 95 certified models
• Galanz — 92 certified models
• Marvel — 76 certified models

See the full certified refrigerator list to compare any of these against a specific full-size model.

Is a second, compact fridge worth the extra electricity?

In isolation, $46 a year is a small line item. The catch is that it’s additive — a garage or office mini fridge doesn’t replace your main refrigerator’s cost, it stacks on top of it. If you’re instead downsizing (say, replacing an aging full-size unit in a small apartment), the comparison above is the one that matters: a compact model can cut that appliance’s running cost by roughly half, on top of whatever efficiency gains come from replacing an older unit.

FAQ

How much electricity does a mini fridge use per year? The median certified compact refrigerator uses 245 kWh a year, about $46 at the U.S. average electricity rate.

Are mini fridges always cheaper to run than full-size refrigerators? Usually, but not always — the priciest certified compact models use around 470 kWh a year, close to a median full-size refrigerator. Size category isn’t a guarantee; check the specific model.

What’s the cheapest certified mini fridge to run? The Fisher & Paykel RS2435V2, certified at 42 kWh a year — about $8 a year at the U.S. average rate.

Does ENERGY STAR test compact refrigerators the same way as full-size models? Yes — both use the same DOE test procedure for annual energy use; compact is simply a separate certified size category.

Which brands make the most certified compact refrigerators? Frigidaire, Magic Chef, upstreman, Galanz, and Marvel have the largest certified compact lineups in the data.