Best Microwaves Australia 2026:
Inverter vs Standard, and the Door Switch That Fails

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Inverter or standard: what the word actually changes

A standard microwave can only run its magnetron at full power. When you pick 50 percent, it switches the whole thing on and off in cycles of several seconds, so the food gets blasts of full power with rests in between. That's why the edge of a frozen lasagne goes rubbery while the middle is still icy. An inverter microwave replaces the heavy transformer with a switching power board that can actually turn the magnetron down, so 50 percent really is about half power the whole time.

In practice that shows up in three jobs: defrosting, softening butter or ice cream, and reheating something dense without the outside boiling. If you mostly zap a coffee or a bowl of soup on high, you won't notice much difference, and a standard machine is fine. If you defrost meat a couple of times a week, I reckon the inverter is worth the extra money, because it's the one feature on a microwave box that changes how food comes out.

Inverter boards are also lighter than a transformer, which is why the inverter models tend to weigh a little less for the same size. The trade-off is that the board is a more complex part, and when one fails it's usually a board swap rather than a simple fuse. In my experience they're not less reliable, just different, and Panasonic has been building them long enough that its inverter models are the ones I see the most of still going years later.

Size: litres, plate width and the turntable

The litre figure on a microwave box is the cavity volume, and it's a bit misleading because you can't use the corners. What matters is the width of the turntable or the flat floor, because that's what decides whether your dinner plate or casserole dish fits. A 23 to 25 litre microwave usually takes a plate around 25 to 27cm across. A 32 to 34 litre one gets you up to about 30cm, which is the size of most dinner plates in Australian kitchens.

Russell Hobbs is one of the few brands that says it straight on the listing: its 34 litre RHMO300 fits a 30cm dinner plate. The others list litres and leave you to guess. Measure your largest dish before you order, including the handles, and add a centimetre or two of clearance so it can turn without catching the walls. A dish that scrapes the side every rotation will eventually jam the turntable motor.

Bigger isn't free either. A 34 litre microwave takes up a lot of counter, and the outside dimensions can be 55 to 60cm wide. For one or two people, a 25 litre machine is usually plenty, and it sits in a corner without dominating the kitchen. For a family that reheats plates of dinner every night, the larger cavity saves doing two rounds, and that's where the 32 to 34 litre machines earn their space.

Watts on the box against watts at the wall

The 900W, 1000W or 1100W on a microwave box is usually the cooking output, not what it pulls from the socket. The wall draw is higher because no magnetron turns all its input into heat in the food, and the fan, light and turntable take a little too. The real input figure is on the rating plate, normally on the back or inside the door frame, and it's worth a look if you're planning to run it on the same circuit as a kettle.

For running cost, say a microwave draws around 1,500W at the wall (check your own rating plate, as this is an assumption). At the AU average tariff of roughly 33c per kWh, five minutes on high costs about 4c. Even with heavy daily use it's a small line on the power bill, and for reheating a single plate it's usually far less energy than heating a full oven. Our guide to smart home power savings covers where the bigger savings are hiding.

Higher output mostly means faster cooking, not better cooking. A 1200W machine boils a mug a little quicker than a 900W one, and auto menus are tuned to the wattage, so the presets still work either way. Where it does matter is following packet instructions, which are often written for an 800 to 1000W microwave. On an 1100W or 1200W machine, start at the low end of the time and check.

Flatbed or turntable

Most microwaves still use a glass turntable on a roller ring, driven by a small motor under the floor. It works well, but the motor, the coupler and the roller ring are all wear parts. A flatbed microwave, like the Panasonic NN-SF564W in this list, has no turntable at all. The antenna that spreads the microwave energy sits under a flat ceramic floor and does the stirring instead, so you can push a rectangular dish right into the corner.

Panasonic says its flat and wide design gives 31 percent more cooking area than its conventional turntable models, and that matches what you'd expect from using the corners. The other advantage is cleaning, because there's no ring or plate to lift out and no gap underneath for spills to collect and go sticky. If you've ever pulled a turntable plate out and found a brown crust underneath, you'll see the appeal straight away.

Flatbeds aren't perfect. Heating can be a bit less even near the edges, so stirring halfway still helps, and you can't put a heavy pot right at the front edge and expect the same result as in the middle. In my experience the trade-off is worth it for people who reheat in oblong containers or cook in a casserole dish, and less important for people who only ever heat a bowl or a mug.

Sensor cooking and auto menus

A sensor microwave measures the steam coming off the food and stops when it decides the food is hot, rather than just counting down the time you typed in. The Panasonic NN-ST665B is the sensor model in this list, with 19 auto menus that use it. It works well for reheating a plate or cooking frozen vegetables, as long as the food is covered loosely so the steam actually reaches the sensor.

Auto menus without a sensor are just preset times and power levels for a typical weight, and they're only as good as your guess at the weight. The Breville Easy Wave has eight of these, covering popcorn, butter, frozen meals, vegetables, potato, pasta and rice. The Russell Hobbs has six. They're handy for the jobs you do every day, but most people end up using two or three of them and the start button for everything else.

Whatever you buy, the single most used control is the quick start. Panasonic calls it Add Time or Quick 30, and Breville's is a press on the dial that adds 30 seconds each push. Try to see a photo of the control panel before you order. A clear one-touch start and an easy power level button matter more day to day than how many menus are printed on the door.

Where it sits: clearance, vents and powerboards

A countertop microwave needs to breathe. Most have vents on the top, back or sides, and the manual will give clearance figures, often around 10 to 20cm above and a few centimetres at the back and sides. Shoving one into a tight cupboard nook or stacking things on top of it traps heat, and heat is what cooks the magnetron, the fan motor and the control board over time. It's usually the first thing I'd change in a kitchen where a microwave keeps tripping its thermal cutout.

Plug it straight into a wall socket. A microwave pulls a lot of current in short bursts, and putting it on a powerboard with a kettle or toaster is a good way to overload the board, especially a thin no-name one. A standard AU socket is rated at 10A, which is about 2,400W, and a microwave plus a kettle can go over that. If you must use a board, use a good one, like the ones in our surge powerboard guide, and keep the kettle elsewhere.

Look for the RCM mark on the rating plate. Every model in this list comes from a major brand sold through Amazon AU with an Australian plug, and the Panasonic listings say so in writing. Grey-import microwaves with a different plug or an adaptor are a bad idea, because the adaptor becomes the weak point in a high-current appliance, and warranty support usually isn't there when you need it.

Why you should never open one at home

This is the one appliance I'd tell anyone not to take apart. A microwave has a high voltage capacitor that can hold a dangerous charge for a long time after the plug's pulled out, and the transformer and magnetron circuit run at thousands of volts. People see a blown fuse online and think it's an easy fix, but the fuse usually blew because something else failed, and the capacitor doesn't care that you've unplugged it.

What you can safely do is check the outside. Look at the door seal for food build-up, check that the door closes firmly and the latches line up, and look for burn marks on the small grey or mica panel inside the cavity wall. That panel is the waveguide cover, and grease or food splatter on it is the classic cause of sparks and a burning smell. A dirty one can often be cleaned, and a burnt one is a low-cost part, but it needs fitting properly.

If the door is bent, the glass is cracked or the hinges are loose, stop using it. The door and its seal are what keep the microwave energy inside, and a damaged door isn't something to tape up and keep going with. Most of the time, a microwave with a damaged door or a dead magnetron is a replacement job anyway, because the part and labour costs get close to the price of a new 25 litre model.

The faults that are often worth fixing are a dead door switch, a failed turntable motor or a loose control panel connection. Those are relatively small parts. The question is always whether the repair is worth it on a machine that cost a couple of hundred dollars, and it's better to ask before buying a new one, because sometimes the answer is a $20 part and sometimes it really is time for a new microwave.

What I left out and why

This guide is about countertop microwaves only. I've left out built-in models, because they need a trim kit and a cabinet cut-out and they're usually installed with the kitchen. I've also left out convection and combination microwaves that grill or air fry, because they're a different buying decision with a heating element, a second fan and a lot more to go wrong. If crisping is what you're after, our air fryer guide is the better place to start.

Every pick is new and sold by Amazon AU. I skipped renewed and refurbished microwaves on purpose, because the door seal and the interlock switches are the parts that wear, and you can't check either from a listing photo. I also left out a Westinghouse 40 litre model that ranked well but had very little feature detail on its listing, since I'd rather recommend machines where the specs are written down.

The five that made it cover the main choices: a sensor inverter model for people who want the best reheating, a well-priced inverter for small kitchens, a flatbed for oblong dishes, a compact inverter with simple controls, and a big 34 litre standard model for families. If you're kitting out a new kitchen at the same time, the food processor picks follow the same logic of buying for the job you'll actually do most.

The 5 picks, $198 to $328

Prices are Amazon AU at time of writing (29 October 2026) and move week to week. Ranks are Amazon AU category sales ranks, checked the same day.

Side-by-side comparison

What we see fail in the workshop: microwaves

Microwaves are simple on the outside, but they run at very high voltage inside, so I'm careful about what I suggest people check themselves. When one stops working, it's usually one of three faults, and only one of them is a big one. Here's what typically goes wrong, why, and what you can safely look at before deciding whether it's worth fixing.

Decision tree: which one should you actually buy?

• Want the best all-rounder for a family that reheats and defrosts often? → The Panasonic NN-ST665B at $328 is the #1 microwave on Amazon AU, with a 32 litre cavity, inverter power and sensor cooking.
• Small kitchen, one or two people, and want inverter defrosting? → The LG NeoChef 25 litre at $198 is the best value inverter here and the #2 microwave on Amazon AU.
• Want the simplest possible controls? → The Breville Easy Wave LMO425 at $249 starts with one press of the dial and adds 30 seconds per press, with inverter power.
• Reheat in oblong containers or a casserole dish? → The Panasonic NN-SF564W flatbed at $298 has no turntable, so dishes can go right into the corners.
• Need to fit a full 30cm dinner plate? → The Russell Hobbs RHMO300 at $230 has a 34 litre cavity that fits a 30cm plate, though it's a standard, non-inverter model.
• Microwave sparking, dead or running without heating? → Don't open it, as the capacitor can stay charged. Bring it to our Erina workshop and we'll tell you whether it's a switch, a waveguide cover or a bigger fault, and whether it's worth fixing, before you spend anything.

Frequently asked questions

Is an inverter microwave worth it?

For most households that defrost meat or soften butter and ice cream, yes. A standard microwave can only run at full power, so it gets lower settings by switching on and off in cycles, which cooks the edges while the middle stays frozen. An inverter actually turns the power down, so low settings stay low the whole time and defrosting is far more even. If you only ever heat drinks and soup on high, a standard model is fine. In this list, the Panasonic, LG and Breville picks are inverters and the Russell Hobbs is standard.

What size microwave do I need?

Size it by your largest plate or dish, not the litre figure. A 23 to 25 litre microwave usually takes a plate about 25 to 27cm across, which suits one or two people. A 32 to 34 litre model fits a plate around 30cm, the common Australian dinner plate size, and suits families. Measure your biggest dish with its handles and allow a little clearance so it can turn without scraping the walls. Also check the outside width, because a 34 litre microwave can be close to 60cm wide.

Why is my microwave sparking?

The most common cause is food and grease built up on the waveguide cover, the small grey panel on the inside wall. It carbonises and then arcs. Metal trim on a plate, foil and twist ties cause sparks too, so check what's inside first. Stop using it, let it cool, and clean the cavity and the cover gently. If the cover is burnt or has a hole in it, it needs replacing. If sparks continue after cleaning, or there's a burnt smell from inside the case, have it checked rather than keep using it.

Can I fix my microwave myself?

I'd tell anyone not to open the case. A microwave has a high voltage capacitor that can hold a dangerous charge for a long time after it's unplugged, and the high voltage circuit runs at thousands of volts. You can safely clean the inside, check the door closes firmly, look for burn marks on the waveguide cover and replace a turntable plate or roller ring. Anything inside the case, including the fuse, door switches and magnetron, should be left to someone with the right training and tools.

Is a flatbed microwave better than a turntable?

It depends on what you cook in. A flatbed has no turntable, so oblong containers and casserole dishes can go right into the corners, and there's no plate or roller ring to clean or wear out. Panasonic says its flatbed design gives 31 percent more cooking area than its turntable models. Heating can be slightly less even near the edges, so stirring halfway helps. If you mostly heat bowls and mugs, a turntable model is fine. If you use rectangular dishes, a flatbed like the Panasonic NN-SF564W is worth it.

Can I run a microwave on a powerboard?

It's better to plug it straight into a wall socket. A standard Australian socket is rated at 10A, roughly 2,400W, and a microwave draws more at the wall than its cooking output on the box. Running a microwave and a kettle on the same powerboard can overload it, especially a thin no-name board. If you have to use a board, use a good quality one with overload protection and keep other high-draw appliances like kettles and toasters off it. Check the rating plate on the back for the real input wattage.

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