null

Appliance Wattage Calculation

Common Appliance Wattages

Power Consumption Charts

POWER CALCULATIONS:

Some items are only used for a short amount of time and not continuously throughout the day. A 300-watt appliance used for 5 minutes per day will only consume 25-watt hours per day.

How Much Power Do Your Home Appliances Use?

The table below shows approximate appliance wattage ratings for the items listed. Keep in mind that your specific appliance may vary and this table is just a guideline. For more accurate appliance wattages, check the rating on the appliance or use a kilowatt meter to measure the energy usage. Multiply the hours used on an average day by the wattage listed below. This will give you the watt-hours consumed per day.

Some items are only used for a short amount of time, and not continuously throughout the day. A 300-watt item used for 5 minutes per day will only consume 25- watt hours per day. Newer, more efficient models may require less power consumption. Most appliances are now equipped with an energy star rating that will tell you the appliance wattage usage per month and year.

Surge Rating

When sizing your DC to AC power inverter, be sure to plan for the surge rating on your appliance. An 800-watt washing machine has a surge rating of 3000 watts, be sure to choose a power inverter that will handle the surge rating. In this case, a 1500 watt inverter should do.

 

Kitchen Appliances

Appliance Watts Appliance Watts
Blender 500 Coffee Machine 1000
Dishwasher 1200-1500 Chest Freezer (15 cu.ft.)* 1080 Wh/Day
Refrigerator (16 cu.ft.)* 1200 Wh/Day Garbage Disposal 450
Microwave 1000 Electric Oven 1200
Toaster 850 Toaster Oven 1200

 

For low power consumption, higher efficiency DC refrigerators and chest freezers, click here!

*To estimate the number of hours that a refrigerator actually operates at its maximum wattage, divide the total time the refrigerator is plugged in by three. Refrigerators, although turned "on" all the time, actually cycle on and off as needed to maintain interior temperatures.

 

Lighting

Appliance Watts Appliance Watts
CFL Bulb: 40W Equivalent 11 LED Bulb - 40W Equivalent 10
CFL Bulb - 60 W Equivalent 18 LED Bulb - 60W Equivalent 13
CFL Bulb: 75W Equivalent 20 LED Bulb - 75W Equivalent 18
CFL Bulb: 100W Equivalent 30 LED Bulb - 75W Equivalent 23
Incandescent 50 Watt 50 Halogen - 40 Watt 40
Incandescent 100 Watt 100    


Task lighting typically consumes less power than overhead lighting because task lights give you more flexibility than a large central light. Timers are great for making sure lights are not left on longer than intended and motion sensing lights will only run when you really need them. You can find DC timers and LED Floodlights on our website to optimize your lighting efficiency.

 

Heating & Cooling

Appliance Watts Appliance Watts
Box Fan 200 Furnace Fan Blower 800
Ceiling Fan 120 Space Heater NA 1500
Central Air Conditioner - 24,000 BTU NA 3800 Window Air Conditioner 12,000 BTU NA 3250
Central Air Conditioner - 10,000 BTU NA 1200 Window Air Conditioner 10,000 BTU NA 1200


Water

Appliance Watts Appliance Watts
Well Pump - 1/3 1HP 750 120V 50 Gal Water Heater - Electric 1125
220V Tankless Water Heater - Electric 18000 240V 50 Gal Water Heater - Electric 4500


Using a natural gas or propane heater will reduce the amount of electricity you'll have to produce using wind, solar or hydropower.

 

Laundry

Appliance Watts Appliance Watts
Electric Clothes Dryer 3000 Top Loading Washer 800
Gas Clothes Dryer 1800 Iron 1200

 

Office

Appliance Watts Appliance Watts
Desktop Computer (Standard) 200 LCD Monitor 100
Laptop 100 Modem 7
Printer 100 Router 7
Smart Phone - Recharge 6 Tablet - Recharge 8

 

Living Room / Electronics

Appliance Watts Appliance Watts
LCD Television 150 Blu Ray DVD Player 15
Plasma Television 200 Standard DVD Player 15
Satellite Dish 25 Cable Box 35
Stereo Receiver 450 Video Game Console 35


TVs, Computers, and other devices left plugged in but not turned on still draw power. Using a power strip with an on/off switch will ensure that you fully power down phantom loads on appliances.

 

Tools

Appliance Watts Appliance Watts
Band Saw: 1/4" 1100 Disc Sander: 9" 1200
Belt Sander: 3" 1000 Drill: 1/4" 250
Chain Saw 1100 Drill: 1" 1000
Circular Saw: 7 1/4" 900 Hedge Trimmer 450
Circular Saw: 8 1/4" 1400 Weed Eater 500

 

Cleaning & Personal Care 

Appliance Watts Appliance Watts
Vacuum 1000 Clock Radio 7
Sewing Machine 100 Hair Dryer 1500
Dehumidifier 280 Electric Shaver 15
Humidifier 200 Curling Iron 150
Electric Blanket 200    

 

Phantom Loads

Secret sources of power consumption

A phantom load is energy consumed by an appliance when switched "off." Some electronics feature displays or LED lights or are continuously searching for a signal. These loads consume very little power, but over time they waste a lot of energy. Unplugging appliances such as TVs, DVD players, stereos, etc. will save power and reduce the overall amount of power you have to produce and store.

Using a simple power strip that can be unplugged or switched off is an easy way to eliminate phantom loads.

Missouri Wind and Solar BBB Business Review