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Panasonic NN-SN77HS Microwave Review

Tested using Methodology v1.0
Reviewed Jul 10, 2024 at 10:13 am

The Panasonic NN-SN77HS is a big countertop microwave. Its cooking chamber is deep and wide but not as high as many microwaves', so keep that in mind if you need to reheat beverages in pitchers or bottles. Its controls don't stand out much from other microwaves but include sensor cooking and defrosting, a 'Standing Time' option, and a mute function.

Our Verdict

10 Power

The 1250-watt Panasonic NN-SN77HS heats food particularly quickly. It's faster than some microwaves with a similar advertised power output, like the Breville the Smooth Wave.

  • Very fast heating.
  • Wide and deep cooking chamber.
  • Sensor cooking and mute function.
  • Cooking chamber is a bit short.

Performance Usages

  • 10 Power
  1. Updated Jul 10, 2024: Review published.

Differences Between Sizes And Variants

This microwave comes in one variant. You can see the label for the unit we tested here.

If you encounter another variant, let us know in the comments, and we'll update our review.

Compared To Other Microwaves

The Panasonic NN-SN77HS is a big countertop microwave that heats food faster than most microwaves we've tested. If you need even more space in the cooking chamber, the Panasonic NN-SN975S is the only countertop microwave we've tested with a bigger chamber. This model's chamber is a bit short for its overall size. If you need more vertical space, consider the Panasonic NN-SN67HS or the Toshiba EM131A5C-BS, although these models heat food slightly slower.

If you're looking for a recommendation, check out the best over-the-range microwaves and the best microwaves.

Test Results

perceptual testing image
Height 11.9" (30.1 cm)
Width 21.9" (55.5 cm)
Depth Without Handle
19.1" (48.6 cm)
Depth With Handle
Power Cord Length 3.64 ft (1.11 m)
Cooking Chamber
Advertised Chamber Volume
1.6 cu. ft.
Turntable Diameter
15.0" (38.0 cm)
Chamber Height
8.5" (21.7 cm)
Chamber Width
16.5" (41.9 cm)
Chamber Depth
18.4" (46.8 cm)
Measured Chamber Volume
1.5 cu. ft. (0.04 m³)

The chamber is wide and deep but not that high. The light inside isn't bright enough to provide great visibility into the chamber.

Controls And Functions
Door Release
Cooking Sensor
Popcorn Button
Defrost Button
Add Time Button
Kitchen Timer
Mute Sounds Button
Lock Controls Button

Aside from a slightly different layout, its controls are very similar to other microwaves from the brand, like the Panasonic NN-SN67HS or Panasonic NN-SN975S. You can easily start a quick 30-second cycle, mute its controls, and it has plenty of modes aside from manual cooking. There are sensor reheat and defrost functions and 15 'Sensor Cook' programs. These modes use a sensor that detects steam and automatically adjusts the cook time. You can set it to keep your food warm at a low power setting, program a delayed start, or set a 'Standing Time' for foods like microwave dinners that are meant to sit after cooking. The main way its controls and programs stand out from other Panasonic models is the addition of a 'Coffee/Milk' button.

In The Box

  • Turntable
  • Turntable roller
  • User Manual

Inverter Technology
Advertised Microwave Output Power
1,250 W
Tested Heating Rate At 100% Power
806 W
Shallow Dish Heating Uniformity
Area Of Underheated Dinner Plate
Grayscale Range Dinner Plate
Area Of Underheated Turntable
Grayscale Range Turntable

All microwaves perform similarly when evenly heating food in shallow dishes. Heating evenness depends on what kind of food you're microwaving, how much of it, and in what container. If you're interested in knowing more about microwave performance, check out our investigation here.

Deep Dish Heating Uniformity
Min. Food Temperature (100% Power)
73 °F (23 °C)
Food Temperature Range (100% Power)
126 °F (70 °C)
Min. Food Temperature (50% Power)
82 °F (28 °C)
Food Temperature Range (50% Power)
121 °F (67 °C)

Like with shallow dishes, you won't notice a difference between microwaves when evenly heating food in deep dishes. Evenness depends on what you're heating, not what microwave you use. You can read more about our investigation into microwave performance here.