This Microwave Feature Is Pure Marketing

Key Findings

The review compared 26 microwaves: 19 conventional and 7 inverter models, using temperature probes and tests involving leftovers, defrosting, and delicate foods.

Inverter technology changes how power is delivered. Conventional microwaves generally alternate between full power and off, while inverters can provide more continuous, adjustable power. At 100% power, the two types behave the same.

Despite this difference, the tests found no consistent improvement in everyday heating from inverter models:

• Leftovers: Inverter microwaves did not heat mashed potatoes more evenly.
• Defrosting: Neither type defrosted ground beef well. The tested Panasonic inverter thawed more meat but also cooked the edges, while some areas remained frozen. Adjusting the programmed weight did not fix the problem.
• Delicate foods: Tests with butter, chocolate, fried eggs, and scrambled eggs showed no consistent inverter advantage. A $400 Breville inverter and a $90 Insignia conventional microwave both softened butter successfully when it was heated in short bursts and turned. In continuous 30% power tests, the results were hard to distinguish.

Why the Results Were Similar

Microwaves create hot and cold spots inside the oven. A turntable helps move food through them but does not eliminate uneven exposure.

Microwave energy penetrates food only about 1–3 cm, depending on its composition. Thick foods therefore rely on heat spreading from warmer areas to cooler ones.

Stirring, turning, flipping, and letting food rest can matter more than whether the microwave has an inverter.

Potential Benefits and Limitations

An inverter can supply lower power immediately, whereas a conventional model may begin a short heating cycle at full power. This may help with very small tasks, such as softening two teaspoons of cold butter.

Inverters may also be useful where a kitchen’s electrical supply has strict current limits. At lower settings, an inverter can operate below its maximum current and may avoid tripping a breaker or overloading an isolated power system.

The reviewers did not find evidence for claims that inverters reduce splattering when reheating saucy or greasy foods at low power.

The main drawback is not that inverters performed worse, but that their extra cost or marketing appeal may not translate into noticeably better everyday heating.

Verdict

An inverter microwave is technologically different, but the review found no meaningful overall heating advantage in its tests. Don’t choose a microwave solely for the inverter feature—or avoid one because it has it. Prioritize overall power, size, design, and user interface instead.

No numerical product ratings or scores were given.

Speakers

The video presents a single narrator’s perspective; no distinct speakers offer separate views.