ELECTRICAL DATA ARCHIVE · 50+ BENCHMARKED APPLIANCES
Appliance Wattage, Surge & Duty Cycle Database
Direct Answer: Running Watts vs Starting Surge Explained
IEEE 1547 & NEC Article 430
Electrical appliances have two distinct power ratings: Running (Continuous) Watts, which represents the electricity consumed during steady-state operation; and Starting (Surge/Inrush) Watts, which represents the brief 100ms–500ms current spike demanded when electric motors (refrigerator compressors, sump pumps, well pumps, air conditioners) start from a dead stop. Surge demand is typically 3× to 6× higher than running wattage. Your backup inverter or generator must exceed the highest simultaneous starting surge in your home to avoid tripping overcurrent protection.
| Appliance & Equipment | Category | Running Watts | Starting Surge (Watts) | Typical Duty Cycle | Daily Energy (Wh/day) | Minimum Inverter Class |
|---|---|---|---|---|---|---|
| Modern Refrigerator (Energy Star, 20 cu ft) | Kitchen | 100W – 150W | 800W – 1,200W | 33% (20 min/hr) | 1,000 – 1,200 Wh | 1,500W Pure Sine |
| Chest Freezer (Medium 10 cu ft) | Kitchen | 60W – 90W | 500W – 750W | 25% (15 min/hr) | 400 – 550 Wh | 1,000W Pure Sine |
| Countertop Microwave Oven (1000W output) | Kitchen | 1,400W – 1,600W | 1,800W | 100% (Intermittent, 15 min/d) | 350 – 400 Wh | 2,000W Pure Sine |
| Electric Drip Coffee Maker (12-cup) | Kitchen | 800W – 1,200W | 1,200W | 100% (15 min/brew) | 250 – 300 Wh | 1,500W Pure Sine |
| Instant Pot / Electric Pressure Cooker | Kitchen | 1,000W | 1,000W | 50% (Duty heating cycles) | 400 – 600 Wh | 1,500W Pure Sine |
| Kitchen Blender (High Power / Vitamix) | Kitchen | 1,200W | 1,800W | 100% (5 min/day) | 100 Wh | 2,000W Pure Sine |
| Electric Toaster (2-slice) | Kitchen | 850W | 850W | 100% (5 min/day) | 70 Wh | 1,000W Pure Sine |
| Submersible Well Pump (1/2 HP, 240V) | Pumps | 800W – 1,050W | 3,500W – 4,500W | Intermittent (1 hr/day total) | 900 – 1,100 Wh | 4,000W 240V Split-Phase |
| Submersible Well Pump (1.0 HP, 240V) | Pumps | 1,500W – 1,900W | 6,000W – 7,500W | Intermittent (1 hr/day total) | 1,600 – 1,900 Wh | 8,000W 240V Split-Phase |
| Sump Pump (1/3 HP Submersible) | Pumps | 600W – 800W | 2,200W – 2,800W | 15% (Storm cycling) | 1,800 – 2,500 Wh | 3,000W Pure Sine |
| Sewage Ejector Pump (1/2 HP) | Pumps | 900W – 1,100W | 3,200W – 4,000W | Intermittent (15 min/day) | 250 – 300 Wh | 4,000W Pure Sine |
| CPAP Machine (Humidifier & Tube Heat OFF) | Medical | 25W – 35W | 40W | 100% (8 hrs sleep) | 200 – 280 Wh | 300W (or 12V DC direct) |
| CPAP Machine (Humidifier & Heated Tube ON) | Medical | 70W – 100W | 110W | 100% (8 hrs sleep) | 560 – 800 Wh | 1,000W Pure Sine |
| Stationary Oxygen Concentrator (5 LPM) | Medical | 280W – 360W | 800W | 100% (24 hrs continuous) | 6,700 – 8,600 Wh | 2,000W Pure Sine (Dedicated) |
| Portable Oxygen Concentrator (Recharge) | Medical | 90W – 120W | 120W | 100% (4 hrs recharge) | 400 – 500 Wh | 300W Pure Sine |
| Electric Hospital Bed (Actuator Motor) | Medical | 150W | 350W | Intermittent (5 min/day) | 20 Wh | 500W Pure Sine |
| Nebulizer Compressor | Medical | 75W – 100W | 150W | 100% (30 min/day) | 40 – 50 Wh | 300W Pure Sine |
| Natural Gas / Propane Furnace (Blower Motor 1/3 HP) | HVAC | 400W – 600W | 1,400W – 2,000W | 40% (Winter cycling) | 3,800 – 5,800 Wh | 2,000W Pure Sine |
| Window Air Conditioner (8,000 BTU, 115V) | HVAC | 700W – 900W | 2,200W – 3,000W | 50% (Summer cycling) | 8,400 – 10,800 Wh | 3,000W Pure Sine |
| Box Fan / Pedestal Fan (3-Speed, 20-inch) | HVAC | 45W – 75W | 90W | 100% (10 hrs/day) | 450 – 750 Wh | 300W Pure Sine |
| Electric Space Heater (Ceramic, Low Setting) | HVAC | 750W | 750W | 100% (Continuous run) | 18,000 Wh/day (Impractical) | 1,500W (High Battery Drain) |
| Electric Heated Mattress Pad / Blanket (Single) | HVAC | 40W – 60W | 60W | 100% (8 hrs sleep) | 320 – 480 Wh | 300W Pure Sine |
| Home Wi-Fi Router & Fiber ONT Gateway | Comms | 12W – 20W | 20W | 100% (24 hrs continuous) | 288 – 480 Wh | 150W Inverter (or 12V DC) |
| Starlink Satellite Terminal (Gen 3 Standard) | Comms | 50W – 75W | 90W | 100% (24 hrs continuous) | 1,200 – 1,800 Wh | 300W Pure Sine |
| Smartphone Rapid Charger (USB-C PD 30W) | Comms | 30W | 30W | 100% (1.5 hrs/charge) | 45 Wh per charge | USB-C Port Native |
| Laptop Computer (Web Browsing / Work) | Comms | 45W – 65W | 65W | 100% (6 hrs/day) | 270 – 390 Wh | 150W Inverter (or 100W PD) |
| NOAA Weather Radio (Recharge Battery) | Comms | 2W – 5W | 5W | 100% (3 hrs recharge) | 10 Wh | USB-A Native Port |
| LED Television (55-inch 4K UHD) | Comms | 75W – 110W | 110W | 100% (3 hrs news watching) | 225 – 330 Wh | 300W Pure Sine |
| LED Light Bulb (60W Equivalent) | Tools | 8W – 10W | 10W | 100% (6 hrs evening) | 48 – 60 Wh per bulb | 100W Inverter |
| Circular Saw (15 Amp, 7-1/4 inch) | Tools | 1,800W | 3,600W | Intermittent (30 min total) | 900 Wh | 4,000W Pure Sine |
| Cordless Drill Battery Charger (18V/20V) | Tools | 60W – 90W | 90W | 100% (1 hr per pack) | 75 Wh | 300W Pure Sine |