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How Many Watts Do You Need?

To select an inverter from DonRowe.com that has enough power for your application, add the watts for items you may want to run at the same time. Use the total wattage, plus 20%, as your minimum power requirement.

Note: The wattage's given below are estimates. The actual wattage required for your appliances may differ from those listed. Check the nameplate on the appliance to determine the actual wattage required.

* Appliances and tools with induction motors (marked * in tables) may require from 3 to 7 times the listed wattage when starting. The start-up load of the appliance or tool determines whether an inverter has the capability to power it. Be sure to check the specific wattage requirements and operating instructions for appliances / tools to be used.

F.Y.I. ..... (conversion formula: Watts รท 120 = Amps ........ Amps x 120 = Watts)


Common Appliances

Appliance Estimated Watts
Appliance Estimated Watts
Coffee pot (10 cup) 1200 VCR 40-60
Coffee pot (4 cup) 650 CD or DVD Player 35
Toaster 800-1500 Stereo 30-100
Cappuccino Maker 1250 Clock Radio 50
Coffee Grinder 100 AM/FM car cassette 8+
Blender 300 Satellite dish 30+
Microwave (600 to 1000 W cooking power) 1100-2000W
(elec. consumption)
Vacuum cleaner 300-1100
Waffle iron 1200 Mini Christmas lights (50) 25
Hot plate 1200 Space Heater 1000-1500
Frying pan 1200 Iron 1000
Toaster Oven 1200 Washing machine 920
Blow dryer 900-1500 12" 3 speed table fan 230
Computer
- laptop
- pc & monitor
- printer-inkjet

50-75
200-400
60-75
TV - 25" color
- 19" color TV or monitor
- 12" b&w
13" color TV/VCR Combo
300
160
30
230
*Refrigerator/Freezer 600 Game Console (X-Box) 100
*Freezer 500-800 *Furnace Fan (1/3hp) 1200


Common Tools

Tool Estimated Watts
Tool Estimated Watts
Jig Saw 300 1/4" drill 250
Band Saw 1200 3/8" drill 500
Table Saw 1800 1/2" drill 750
6 1/2" circ. saw 1000 Shop Vac 5 hp 1000
7 1/4" circ. saw 1200+ *Sabre Saw 500
8 1/4" circ. saw 1800 *Portable Grinder 1380
Disc Sander 1200 *Electric Chain Saw 14" 1200
Makita Chop Saw 1550 *Airless Sprayer 1/2 hp 600
Makita Cut Off Saw 1000 *Air Compressor 1 hp 2000


Pumps and Air Conditioners

Pump Running Starting
Air Conditioner
*Well Pump 1/3 hp 750 1400-3000 *7000 BTU to 10000 BTU
Running: 1000-1500. Starting: 2200-5000.
(A/C's are a very difficult load because of the high start-up surge. Use the Locked Rotor Amps to determine the start up surge requirement).
*Well Pump 1/2 hp 1000 2100-4000
*Sump Pump 1/3 hp 800 1300-2900
*Sump Pump 1/2 hp 1050 2150-4100