Panasonic NN-CD58JS is a mid-sized convection, grill and microwave oven

What Geeks like in 2019

The Panasonic NN-CD58JS is a convection oven. It is also a grill. It is also a microwave. And, it does all these things very well. Add them together in combo cooking and the whole is greater than the sum of its parts.

GadgetGuy is about lifestyle tech, and one wonders why we like to review microwaves, coffee makers, home and other kitchen appliances. The answer is that if it plugs in, makes life easier then we will review it – all the better if there is an app for that.

We are quite expert at microwaves having reviewed LG, Panasonic, Sharp, KitchenAid, Samsung, Breville, Whirlpool, AEG, Miele and more. Our review paradigms have changed over the years. Long ago it was all about which microwave oven could nuke food fastest, e.g. Watts power. Then we saw the addition of steam that left vegetables and meats juicier. Some had auto weight functions and some auto cook.

Evolution: combination ovens

Why? As housing gets more expensive, space becomes a premium. Kitchens are smaller – much to Uber Eats and Deliveroo’s delight. Evidence of that is more single draw and half-size dishwashers, two-plate cook tops and often no oven at all – replaced by a fancy built-in combo-one-size-fits-all oven.

Of the four combos last year the Sharp R890E impressed us most scoring 4.3-out-of-5 for overall features, value and functionality. In the second spot was the KitchenAid Bake Assist that while a competent microwave focuses on baking – mmm yummy cupcakes.

In the last place was an under-powered, undersized, overpriced ($2K+), European ‘fashion’ brand that would not be out of place in a swanky kitchen showroom. It was so bad to average at everything we decided not to review it. Yes, we should tell you the brand, but they have powerful lawyers.

For most of us it is getting used to serial cooking that takes the most effort – the result is pretty much the same!

A word on combo-cooking

For the right people, it can and does replace a traditional /microwave/oven/grill. With a little planning, you can avoid using the big power sucking oven or grill element.

But there are a few observations, and we will compare it with our current favourite Sharp.

  • Combo cooking is a serial form of cooking. Cook item one, cook item two etc. It is harder to get everything cooked to serve hot at the same time (but you can plate and reheat so no big issue). Both brands are on par here.
  • At 27L it is at the top-end of equivalent mid-size units. The Sharp at 25L fits a little less.
  •  It has a 34cm turntable compared to the Sharp with a 31.5cm. These suit a single or couple – it is not a family sized oven. Don’t try it on a big roast although the extra 2.5cm (one inch) allows for a little more flexibility.
  • Combination microwave/fan-forced oven/grill needs entirely different cooking pans. Both ovens come with a baking pan and a rack to adjust the height of the food. But you will need to buy more ‘round’ cooking plates and pans to make the most of turntable cooking.
  • The primary advantage of a fan-forced oven is the minimal pre-heat time compared to a full oven of often 20-30 minutes. Panasonic pre-heats a smidgen faster than the Sharp.
  • In all other respects use the same cooking time as you would in a larger fan-forced oven or grill.
  • The grill will produce crispy golden cheese on toast a little faster than the Sharp. The upside to both is no preheat time.
  • And it is possible to use a combination of technologies to get the result. For fear of oversimplifying a frozen pizza can be microwave defrosted, oven baked and grilled for a crispy cheese top in the one device.

Details: Panasonic NN-CD58JS stainless steel, 3-in-1 combination microwave

Size 520 (W), 395 (D) x 310 (H)
It is a little deeper than most due to the ‘baby-bump- at the rear
Capacity 27 litres or 395 x 352 x 217 mm internal space.
A slightly more usable space
Turntable 34cm
The largest in its class. All cooking uses a rotating turntable.
Microwave 1000W – 100, 270, 300, 440, 600 and 1000W settings
Convection 1300W – 40° (keep warm), 100-220° in 10° increments with pre-heat feature
Grill 1300W – three power settings – no preheat
The grill and oven use the same dual quartz  heaters
Combo modes Microwave and grill
Microwave and convention
Features Menu button for up to 29 pre-programmed menus (8 for kids)
Auto roast button
Auto cook button
Turbo defrost button
Timer button
Quick 30 (seconds) button can be added to by further presses
Rotary time dial (easier to use) Standing time
Start delay
Accessories Glass turntable, enamel baking tray, wire rack
Finish Stainless steel fascia and full stainless steel interior
Manual A comprehensive manual, recommended cooking times and cookbook

Panasonic Australia website

Microwave cooking

99.9% of Australians know how to nuke food. What they don’t know is how long to nuke it to achieve the best results.

For example, my wife cooks morning porridge on full power for three minutes often resulting in the contents overflowing the bowl. A little exploration of the manual’s cooking charts shows setting it at 600W for three minutes is best – Voila.

Note: It also has porridge with milk (or water) auto-settings that selects the right power and time for perfect porridge.

We tested a variety of fresh and frozen vegetables and times were in line with any other similar quality 1000W microwave.

Auto settings

A little exploration of the auto-cook function reveals 29 pre-programmed settings for typical bread, meats, vegetables (fresh and frozen), takeaway, pasta, pancakes (pikelets), pizza (fresh and frozen) and more.

Panasonic NN-CD58JS

We tested a 1kg lamb leg mini roast that in a Webber BBQ takes about 1.5 hours. The Auto-settings produced a perfectly cooked roast in 40 minutes using a combination of 300W microwave to par-cook and a 180° oven to roast. We did use the grill to caramelise the roast and vegetables after.


A fresh pepperoni pizza with extra cheese was done to perfection – select preheat oven to 220° and then cook for 10 minutes – Bellissimo. Just needed some Chianti to go with it.

Panasonic NN-CD58JS

We tested frozen pies and fresh pies, and all cooked to perfection at the times/temperatures stated on the package. Pre-heat was nice, but we found adding a couple of minutes to cooking times eliminated the need for that. Pre-heat is fast anyway.


The Grill (and convection oven) uses two ceramic elements in the top, and the turntable rotates the foods for even grilling. We only tried cheese on toast, and it was beautifully cooked and brown in around three minutes.


We cooked fresh lasagna (Woolworth’s variety) using Combi microwave 440W and 220° oven. It took 12 minutes for a beautifully browned top and tender pasta.

Panasonic NN-CD58JS – cooking tests passed with aplomb

The oven has a solid feel, and obvious Panasonic build quality. It will rate marginally better than the Sharp because of its slightly larger turntable and capacity and foods cook a little faster. Other than that, they are neck-and-neck.

Panasonic NN-CD58JS has a recommended price of $549 but astute shoppers will find it at places like Myer for $424.15 including delivery, and that is a real bargain.

The Sharp R890E has a recommended price of $399 (White) and $429 (Stainless), and you will find that from $349.

GadgetGuy’s take

The Sharp and Panasonic are both excellent brands and performance wise there is little between them. I bought the Sharp last year and it is perfect for me and my wife’s needs. Had the Panasonic been available at that time I would probably have paid more a for a slightly bigger capacity.

I also like the Panasonic Ideas Kitchen that has over 70 crowd-sourced and tested microwave recipes.

The real issue is combo cooking is the next big thing. Panasonic also has 32 and 42L versions at $1119 and $1329.

Value for money
Ease of Use
Love the deeper design for added capacity
Fast combo cooking
Handled all convection and grill tests perfectly
Inverter means precision microwave cooking
Intuitive controls – no manual needed
Comprehensive manual covers cooking types, utensils, and cooking times for most popular foods
Short power cable
Accessing Autocook memories takes a lot of button pressing - where is OK Google when you need her?