Our take
Panasonic NN-SD797S is a documented 1.6-cu.-ft. consumer microwave for countertop placement, with an optional cabinet route through a matching trim kit. Panasonic rates cooking output at 1,200 W and lists 1,460 W power consumption separately, so the historical title's 1,250-W figure should not be treated as microwave output. Sensor Cook, Sensor Reheat and Inverter Turbo Defrost are documented controls, giving this model a more feature-rich cooking path than a microwave with only timed presets. Its outside width, height and depth are 21 7/8, 11 15/16 and 19 7/16 inches. The exact historical ASIN page now identifies NN-SD797S / NNSD797S, so the tagged direct destination matches the model. Panasonic's materials do not establish the stainless finish printed in the title or the glass tray diameter; the marketplace's 15-inch tray field is left unconfirmed because its other wattage/capacity data conflict with the manufacturer documents.
Consider NN-SD797S when you want a larger 1.6-cu.-ft. countertop microwave with inverter operation, Sensor Cook/Reheat and a documented optional 27- or 30-inch trim-kit path. Check its 21 7/8 × 11 15/16 × 19 7/16-in. exterior against the counter or cabinet location and plan electrical service for its stated 1,460-W consumption. If tray clearance or exact finish is decisive, confirm those details from the rating label or a manufacturer parts source before buying..
Do not choose it when a manufacturer-confirmed stainless finish, known turntable diameter or certified commercial foodservice duty rating is required. For cabinet installation, do not assume a trim kit is included: verify the exact 27- or 30-inch kit, opening and ventilation instructions for the intended installation.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- The exact-model manual distinguishes 1,200 W cooking output from 1,460 W consumption at 120 V/60 Hz.
- Panasonic documents inverter defrost, Sensor Cook and Sensor Reheat, as well as ten power levels and Keep Warm.
- The model has both a documented countertop placement and optional 27- and 30-inch trim-kit paths.
What to weigh up
- The historical 1,250-W wording does not match Panasonic's 1,200-W cooking-power specification.
- Panasonic's exact-model materials do not confirm the stainless finish or a turntable diameter; Amazon's isolated 15-inch field is not used as authoritative evidence.
- Built-in appearance requires a separately matched trim kit and a cabinet opening that meets the installation instructions; the microwave's countertop documentation does not establish that every cabinet setup fits.
The key details
| Model covered | NN-SD797S |
|---|---|
| Capacity | Panasonic's exact dimension chart lists NN-SD797S at 1.6 cu. ft. and gives its outer dimensions. |
| Microwave output | The manual specifies 1,200 W cooking power and separately lists 1,460 W consumption at 120 V/60 Hz; the historical 1,250-W claim is rejected. |
| Cooking approach | Inverter, Sensor Cook/Reheat, ten levels, Turbo Defrost, Keep Warm and four-stage cooking are documented. |
| Installation options | Countertop placement and exact NN-TK929SF 27-in. / NN-TK939SF 30-in. trim kits are documented. |
| Finish and turntable | Removable glass tray; manufacturer does not state its diameter or confirm this suffix finish. |
Performance figures are manufacturer claims. Source checked October 4, 2026. Regional models and included accessories can differ.
What the features mean for you
Exact model identity and the limits of the historical title
Panasonic's support page is specifically for NN-SD797S, and the operating manual lists NN-SD797S alongside the larger NN-SD997S. Use only the SD797S column and model-specific trim-kit row where the manual separates the siblings. The current Amazon B000ON6HMS page also identifies Panasonic model NN-SD797S and manufacturer part NNSD797S, which supports a direct exact-model destination. The old title's word 'Prestige' is branding, while its stainless-steel finish is not independently confirmed by Panasonic's opened exact-model documents. The page's 1,250-W claim is also not the manufacturer's output rating.
Plan around the documented cavity and exterior dimensions
Panasonic lists 1.6 cu. ft. for NN-SD797S. Its external dimensions are 21 7/8 in. wide, 11 15/16 in. high and 19 7/16 in. deep, so compare all three measurements with the available counter space, keeping the manual's ventilation clearances in view. A capacity label describes the cavity, while the exterior measurements determine whether the appliance can sit in the intended location. The official chart reports the interior cavity dimensions too; do not substitute the sibling NN-SD997S dimensions for this model.
Separate microwave output from electrical consumption
The manual's specifications give 1,200 W cooking power and 1,460 W power consumption, supplied by 120 V/60 Hz. These figures answer different questions: compare 1,200 W when considering rated microwave output, and check the 1,460-W input requirement when planning the circuit. Panasonic's specification is the controlling source for this model; the historical 1,250-W listing text is not used as its cooking-output value. The output figure documents a rating, not a promise about an individual meal's heating time.
Sensor functions and inverter defrost are real model features
Panasonic's manual has separate Sensor Cook and Sensor Reheat sections and documents Inverter Turbo Defrost. It also lists ten power levels, Keep Warm, a popcorn function and up to four-stage cooking. Those features support an answer route for shoppers who prefer sensor-controlled reheating or staged programs. Their presence does not mean every task must use a sensor cycle: manual power and time selection is also available. No personal cooking test or buyer-review claim is being made here.
Countertop use and built-in trim kits are distinct installation choices
Panasonic provides a counter-placement guide and states that a compatible trim kit is used for cabinet installation. Its manual lists NN-TK929SF for a 27-inch trim and NN-TK939SF for a 30-inch trim for NN-SD797S. Choose and verify the exact kit and opening; a generic 27- or 30-inch kit should not be assumed compatible. The option to install with a trim kit does not mean the trim is included or that the appliance can be placed in any cabinet without the specified clearances.
Keep tray size, finish and duty questions explicit
The manual confirms a removable glass tray but does not state its diameter. Amazon currently shows a 15-inch tray field, but the same marketplace information conflicts with Panasonic on power and capacity, so the tray measurement remains null pending stronger evidence. Panasonic also does not confirm the historical title's stainless finish for the exact suffix. The manual says the oven is not intended for industrial or laboratory use, and its Canadian warranty excludes commercial use; this is a consumer model, not a manufacturer-rated foodservice microwave. Verify the rating label or manufacturer parts records if tray size or finish is a deciding constraint.
What else to compare
GE Profile PEM31SFSS is a smaller 1.1-cu.-ft. countertop option with 800 W IEC output, sensor cooking, a 10.625-in. turntable and documented stainless trim kits. Tundra MW700 is much smaller at 0.7 cu. ft. and is described for sleeper-truck use, with 700 W cooking output and inverter compatibility. NN-SD797S provides the documented 1.6-cu.-ft. capacity and 1,200-W output with sensor functions. Compare the actual capacity, output basis, installation plan and confirmed tray dimensions instead of relying on names such as 'Prestige.'
Before you buy
What is the NN-SD797S cooking output?
Panasonic specifies 1,200 W cooking power and separately lists 1,460 W power consumption at 120 V/60 Hz.
Does it have true sensor cooking?
Yes. The exact model manual documents Sensor Cook and Sensor Reheat controls.
Can NN-SD797S be installed in a cabinet?
Panasonic lists optional exact-model NN-TK929SF 27-inch and NN-TK939SF 30-inch trim kits; follow the compatible-kit and opening instructions.
Is the tray 15 inches and the finish stainless steel?
The exact manufacturer sources reviewed confirm a glass tray but not its diameter or the exact suffix's finish; both remain unconfirmed despite the marketplace/title wording.
Is the historical Amazon ASIN an exact model match?
The current B000ON6HMS product-information fields identify NN-SD797S / NNSD797S, supporting a tagged direct model link; Panasonic's manual governs specifications.
Where can I check the current price?
Use the Amazon link for current offers. Check the exact model, seller, product condition, delivery, and return terms. This page does not display a live price or confirm stock.
Sources & review basis
We use the following manufacturer documentation for the product features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- Panasonic NN-SD797S model support page, official operating manual and dimension comparison; current Amazon exact-model details ↗ — checked October 4, 2026.
- Panasonic exact-model support page: model identity, discontinued status, counter-placement instructions, manual links and trim-kit support ↗ — checked October 4, 2026.
- Panasonic official NN-SD797S/SD997S manual: power input/output, inverter, sensors, controls, glass tray, exact trim-kit codes and commercial-use warranty exclusion ↗ — checked October 4, 2026.
- Panasonic official dimension comparison listing exact NN-SD797S capacity and outer dimensions ↗ — checked October 4, 2026.
- Current Amazon item title and product information identify Panasonic NN-SD797S, MPN NNSD797S and ASIN B000ON6HMS; marketplace wattage fields are not used ↗Paid link · We may earn a commission. — checked October 7, 2026.
The decision
Panasonic NN-SD797S is a verified 1.6-cu.-ft. countertop inverter microwave rated at 1,200 W cooking output and 1,460 W consumption, with Sensor Cook/Reheat and optional 27- or 30-inch manufacturer-listed trim kits. The exact historical ASIN page identifies the model and supports a tagged direct link. The historical 1,250-W claim is rejected; finish and turntable diameter remain unknown, and commercial foodservice use is not supported.
Is it the right fit?
Check the exact model and today’s offers on Amazon.