Panasonic Microwave Oven NN-SU66LS
- Countertop Microwave Oven
- 1.3 cu ft
- 1100 watts
- Push button
- More reviewed than 60%
A solid, no-frills 1100 watt countertop microwave for tight spaces, with the caveat that some owners have seen it fail well before its tenth birthday.
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How it ranks among the 85 countertop microwave ovens we track
4.2★ across 467 Amazon ratings, Bayesian-smoothed toward the category average.
467 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 85 countertop microwave ovens we track - how the scorecard works · full countertop microwave ovens data report. Confidence: medium - useful but incomplete evidence.Last refreshed Jun 13, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The Panasonic NN-SU66LS is a countertop microwave built on Panasonic's 1100 watt platform, sized to fit smaller kitchens without dropping down to a lower wattage unit. It includes a turntable and standard touchpad controls.
Owners who bought it to replace an aging Panasonic often report it inheriting the brand's reputation for straightforward performance, though this generation drops the interior light that older models had and pairs it with a dark gray cavity that makes food harder to see. Longevity is where owner experience diverges: several reports of units dying between two and three and a half years sit alongside others still running well after multiple years.
- 1100 watt heating in a compact countertop shell
- Turntable rotates food through the cycle
- No interior light, unlike some earlier Panasonic models
- Dark gray cavity finish
Who it's for
Suited to buyers replacing a failed countertop microwave who want strong 1100 watt heating in a compact frame, particularly where counter or cabinet space is tight. Not a fit for anyone who specifically wants a lit interior to check on food while it cooks.
What buyers say
From Amazon customer reviews.
Owners who bought this to replace an older Panasonic often praise how closely it matches that model's reliability and simplicity, and several call the heating quiet and effective. The recurring complaints are the missing interior light, a dark interior that is hard to see into, and inconsistent longevity, with some units dying between two and three and a half years and one owner reporting interior rust after about two and a half years.
Strengths and trade-offs
Drawn from this product's published specifications.
- Full 1100 watt power in a smaller footprint
- Straightforward touchpad operation
- Turntable for even heating
- No interior light
- Dark gray interior makes food hard to see
- Some units reported failing within a few years
- Rust along interior seams reported by at least one owner
Performance notes
At 1100 watts on Panasonic's standard platform, it heats and reheats food at the pace typical of that wattage class, with a turntable that keeps food rotating through the cycle. Owners describe day to day use as straightforward, though several note the keypad is dim and the unit runs a bit loud in operation.
Specifications
| Brand | Panasonic |
|---|---|
| Model | NN-SU66LS |
| Dimensions & fit | |
| Item Weight | 35.3 pounds |
| Item Dimensions D x W x H | 17.4 × 21.2 × 11.8 inches |
| Capacity & performance | |
| Capacity | 1.3 cu ft |
| Defrost System Type | Auto Defrost |
| Heating Method | microwave radiation |
| Power & efficiency | |
| Wattage | 1100 watts |
| Number of Power Levels | 10 |
| Voltage | 120 volts |
| Energy Consumption | 1100 Watts |
| Power Consumption | 1100 Watts |
| Construction & materials | |
| Material Type | Stainless Steel |
| Inner Material | Stainless Steel |
| Color | Stainless Steel |
| Compatibility & installation | |
| Installation Type | Countertop |
| Human Interface Input | Keypad |
| Included components | |
| Included Components | Microwave, Turntable |
| Warranty & support | |
| Warranty Description | 1 year |
| Other details | |
| Control Type | Push button |
| Number of Programs | 7 |
| Cooking Program | Genius Sensor Cook, Auto Defrost, Reheat |
| Timer Function | Timer Function Available |
| Item Type Name | Countertop Microwave Oven |
| Additional Features | Genius Sensor Cooking |
| Frequency | 50 Hz |
| Recommended Uses For Product | Residential |
Other Panasonic countertop microwave ovens
How it compares
This product against the closest alternatives we track in countertop microwave ovens.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Panasonic Microwave Oven NN-SU66LSThis product | 4.2 / 5 | 467 | 4.1 / 5 |
| COMFEE' EM720CPL-PMB Countertop Microwave Oven with Sound On/OffCOMFEE' | 4.4 / 5 | 28,000 | 4.4 / 5 |
| Nostalgia RMO4BK Retro 0.9 Cubic Foot 800-Watt Countertop Microwave OvenNostalgia | 4.6 / 5 | 1,200 | 4.4 / 5 |
| TOSHIBA EM131A5C-BS Countertop Microwave Ovens 1.2 Cu FtTOSHIBA | 4.4 / 5 | 32,299 | 4.3 / 5 |
| BLACK+DECKER EM720CB7 Digital Microwave Oven with Turntable Push-Button DoorBLACK+DECKER | 4.2 / 5 | 22,300 | 4.3 / 5 |
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Questions about the Panasonic NN-SU66LS
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Does the Panasonic NN-SU66LS have a light inside the microwave?
No. Multiple owners note this model does not include an interior light, which is a change from some earlier Panasonic microwaves.
How powerful is the Panasonic NN-SU66LS?
It runs on Panasonic's 1100 watt platform, which owners describe as full power for a microwave in this size class.
How long does the Panasonic NN-SU66LS typically last?
Owner experience is mixed. Some report units running for years without issue, while others describe failures as early as two to three and a half years of ownership.