Backup Power | Watts Used by Appliance

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Assure you have the electricity when you need it!

HOW MANY WATTS DO YOU NEED?

The speed (amps) and pressure (volts) of electricity are measured as watts (Amps * Volts = Watts).  So a 60 watt light bulb uses 120 Volts times 0.5 Amps for each hour it is left running (typically 7PM to midnight as an average).  Now batteries are rated by their storage capacity and are listed as either “Amp Hours” or Total Wattage, before the batter is completely drained.  The higher the wattage of an appliance the more energy it uses per average hour.

Note: The wattages 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.

Common Appliances

ApplianceEst. WattsApplianceEst. Watts
Coffee pot (10 cup)1200VCR40-60
Coffee pot (4 cup)650CD or DVD Player35
Toaster800-1500Stereo30-100
Cappuccino Maker1250Clock Radio50
Coffee Grinder100AM/FM car cassette8+
Blender300Satellite dish30+
Microwave (600 to 1000 W cooking power)1100-2000W (elec. consumption)Vacuum cleaner300-1100
Waffle iron1200Mini Christmas lights (50)25
Hot plate1200Space Heater1000-1500
Frying pan1200Iron1000
Toaster Oven1200Washing machine920
Blow dryer900-150012″ 3 speed table fan230
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/Freezer600Game Console (X-Box)100
*Freezer500-800*Furnace Fan (1/3hp)1200

Common Tools

ToolEst. WattsApplianceEst. Watts
Jig Saw3001/4″ drill250
Band Saw12003/8″ drill500
Table Saw18001/2″ drill750
6 1/2″ circ. saw1000Shop Vac 5 hp1000
7 1/4″ circ. saw1200+*Sabre Saw500
8 1/4″ circ. saw1800*Portable Grinder1380
Disc Sander1200*Electric Chain Saw 14″1200
Makita Chop Saw1550*Airless Sprayer 1/2 hp600
Makita Cut Off Saw1000*Air Compressor 1 hp2000

Pumps and Air Conditioners

A brief word on running power versus starting power.  To Select an Inverter that has enough power for your site, add the watts for items you may want to run at the same time. Use the total wattage, plus 10% to 20%, as your minimum power requirement.  * 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.

PumpRunningStarting
*Well Pump 1/3 hp7501400-3000
*Well Pump 1/2 hp10002100-4000
*Sump Pump 1/3 hp8001300-2900
*Sump Pump 1/2 hp10502150-4100
Air Conditioner: *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).

For more information about:

Portable Battery Backup Power Click Here

Solar Charged Batteries Click Here

Backup Generators Click Here

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