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.
Appliance Est. Watts
Appliance Est. 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
– pc & monitor
TV – 25″ color
– 19″ color TV or monitor
– 12″ b&w
13″ color TV/VCR Combo
*Refrigerator/Freezer 600 Game Console (X-Box) 100 *Freezer 500-800 *Furnace Fan (1/3hp) 1200
Tool Est. Watts
Appliance Est. 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
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.
|*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|
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