Panasonic NN-SD78LS Cyclonic Inverter Microwave 1.6 Cu Ft
- Capacity: 1.6 cu ft
- Wattage: 1250 watts
- Turntable Diameter: 15 inches
- Heating Method: Microwave Radiation
Last refreshed Jun 13, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
Owners who've had it two-plus years report it still cooking and defrosting evenly, though a serious fire report during normal popcorn use is worth weighing against otherwise strong reliability feedback.
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ASIN: B085T6RKF4Model: NN-SD78LSCategory: Countertop Microwave Ovens
More from this brandAll Panasonic countertop microwave ovensOverview
A 1.6 cu ft, 1250-watt countertop microwave with cyclonic inverter technology and 20 auto-cook sensor presets, close in size to Panasonic's NN-SN76LS but with a rotary dial control layout.
It runs on the same inverter and Genius Sensor platform as Panasonic's other cyclonic models, with more preset options and a dial-based interface instead of a full keypad.
- 1.6 cu ft capacity, 1250 watts
- Cyclonic inverter with 10 continuous power levels
- 20 auto-cook sensor presets
- Turbo defrost and sensor reheat
Who it's for
Buyers replacing a long-serving Panasonic microwave who want continuous variable power. Not for those wanting the simplest possible push-button interface.
Pros and cons
- Control knob and layout called unintuitive
- Fan vents air out front, blows items off counter
- One reported fire during normal popcorn use
Specifications
| Brand | Panasonic |
|---|---|
| Model | NN-SD78LS |
| Dimensions & fit | |
| Turntable Diameter | 15 incheshigher than 78% of 47 countertop microwave ovens |
| Item Weight | 36.8 poundshigher than 81% of 32 countertop microwave ovens |
| Item Dimensions D x W x H | 19.4 × 21.9 × 11.9 inches |
| Capacity & performance | |
| Capacity | 1.6 cu fthigher than 85% of 94 countertop microwave ovens |
| Heating Method | Microwave Radiation |
| Defrost System Type | Defrost |
| Power & efficiency | |
| Wattage | 1250 wattshigher than 92% of 79 countertop microwave ovens |
| Number of Power Levels | 10 |
| Power Consumption | 1250 wattshigher than 89% of 64 countertop microwave ovens |
| Energy Consumption | 1250 wattshigher than 89% of 67 countertop microwave ovens |
| Voltage | 120 volts |
| Construction & materials | |
| Inner Material | Stainless Steel |
| Material Type | Stainless Steel |
| Color | Stainless Steel |
| Compatibility & installation | |
| Installation Type | Countertop |
| Included components | |
| Unit Count | 1 |
| Included Components | Microwave, Turntable |
| Warranty & support | |
| Warranty Description | 1 year |
| Other details | |
| Number of Programs | 20 |
| Control Type | Knob |
| Timer Function | Timer Function Available |
| Recommended Uses For Product | Residential |
| Item Type Name | Microwave Oven |
Closest rivals on specs
TOSHIBA Countertop Microwave Oven 1.6 Cu Ft- Turntable Diameter 15 vs 13.6 inches (+10%)
GE GCST16S1WSS Countertop Microwave 1.6 Cu Ft- Turntable Diameter 15 vs 13.6 inches (+10%)
GE JES1460DSWW Countertop Microwave 1.4 Cu Ft- Capacity 1.6 vs 1.4 cu ft (+14%)
- Energy Consumption 1250 vs 1100 watts (+14%)
- Power Consumption 1250 vs 1100 watts (+14%)
Frequently asked questions
How is the Panasonic NN-SD78LS different from a standard microwave?
Inverter technology gives it continuous variable power instead of pulsing fully on and off at lower settings.
How long do owners report it lasting?
At least one reviewer reports 2.5 years of reliable daily use as of their review.