How much power do your appliances use?
Before you purchase any solar backup system, or solar generator, it’s important to know who much power your appliances use, and what you’ll be using in an emergency situation. This help you to size your solar backup system correctly to get the most efficiency and prolong the life of your system.
Please note that the wattage’s given below are estimates. The actual wattage required for your appliances may very substantially from these listed. Check the nameplate on the appliance to determine actual wattage, or better yet, measure the amperage draw with a clamp-on ammeter or Kill-A-Watt meter. Multiply the hours used on the average day by the wattage listed below. This will give you the watt-hours consumed per day.
Also, appliances and tools with induction motors such as well pumps, washing machines, compressors, etc., 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. Also, air conditioners are a very difficult load because of the high start-up surge.
Once you know your wattage usage, our Solar System Calculator can help you calculate the size of your solar backup system.
|Oven||3,000||Standard TV||188||Well Pump 1/3 hp||750 (Running) 1400-3000 (Starting)|
20 cu. ft. (AC)
16 cu. ft. (AC)
1411 watt-hours/day* 1200 watt-hourrs/day*
|LCD Monitor||80-150||Well Pump 1/2 hp||1000 (Running) 2100-4000 (Starting)|
15 cu. ft. (Up)
15 cu. ft. (Chest)
1240 watt-hours/day* 1080 watt-hrs/day*
|Desktop Computer (Standard)||80-120||Sump Pump 1/3 hp||800 (Running) 1300-2900 (Starting)|
|Dishwasher||1200-1500||Desktop Computer (Gaming)||400-1000+||Sump Pump 1/2 hp||1050 (Running) 2150-4100 (Starting)|
|Electric Clothes Dryer||3,400||Laptop Computer||40-120||Drill (1/4"-1/2")||250-1000|
|Gas Clothes Dryer||300-400||Clock Radio||7||9” disc sander||1200|
|Washing Machine||500-1000||Plasma TV||339||3” belt sander||1000|
|Microwave||1,500||LCD TV||213||12” chain saw||1100|
|Toaster oven||1,200||iPad / Tablet||10-20||14” band saw||1100|
|Hot Plate||1,500||Satellite dish||30||Circular Saw||1400-1800|
|Electric Skillet||1000-1500||Cell Phone - recharge||2-10||Jig Saw||300-700|
|Toaster||1,100||Radiotelephone - Transmit||40-150||Chop / Cut Off Saw||1500-1800|
|Coffee Machine||1,500||Radiotelephone - Receive||5||210 MIG Welder||6,500|
|Blender||300-1,500||100 watt incandescent bulb||100||Air Compressor 1 hp||2000|
|Vacuum Cleaner||500||50 watt DC incandescent||50||Central Air Conditioner||1000-1500 (Running) 2200-5000 (Starting)|
|Dehumidifier||350||25 watt compact fluor. bulb||28||Room Air Conditioner||1,100|
|Humidifier||300-1000||20 watt DC compact fluor.||22||Furnace Blower||300-1000|
|Portable Fan||100||CFL Bulb (60-watt equivalent)||18||Portable Heater||1500|
|Ceiling Fan||100||CFL Bulb (100-watt equivalent)||30||Stock Tank Heater||100|
|Curling Iron||90||Electric blanket||200||Garage door opener||350|
|Hair Dryer||1,538||Water Heater||479||Shop Vac 6.5 hp||1440|
* TV’s, computers, VCR’s, and other devices left plugged in, but not turned on, still draw power.
**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.