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Appliance Watts/Amps Calculator
Electricity is measured in units of energy called watts, named after James Watt, the inventor of the steam engine. Watts is generally defined as the amount of power (or energy) an appliance uses (consumes) when operated at its maximum capacity for 1 hour . Amps on the other hand is defined as how much energy an appliance draws, or the rate of energy that flows through wire when an appliance is used for 1 hour. Finally, volts is what energizes the appliance or it is the force that pushes electricity through wire to the appliance. You can determine power characteristics of an appliance if watts rating is not provided, by the following equation: V (Volts) X A (Amps) = Watts (Ohm's Law)
A=W/V
V=W/A
To determine Amps consumed by a 25watt 12V light bulb, for example, use the equation A=W/V or (25/12=2.1Amps). Therefore, adding up amps figures for the various appliances you intend to plug into a Sunrnr will give you the total electrical load you will put on the equipment (or demand that it powers).
Please note that the proper selection of AC or DC appliances is an important factor, because it is better to have the power source and appliance working at the same voltage, so that, in a manner of speaking, nothing is lost in the conversion. For instance a 12V DC electrical circuit that supports a refrigerator will use power more efficiently if the refrigerator also operates at 12V DC. The efficiency level is lessened if a 12V AC powered refrigerator is connected to a 12V DC electrical circuit using an inverter.
Also, LED (light-emitting diodes) bulbs and Energystar rated appliances consume less energy and operate more efficiently. You can therefore run more of these types of appliances on a Sunrnr. Appliances that run at 240V AC- such as electric water heaters, cook-stoves, furnaces and air conditioners, are impractical loads to run on solar- whether generator or grid-tie. Alternatives such as LP or natural gas for water/space heating or cooking, evaporative cooling instead of compressor based AC units, and passive solar ideas are cost-saving options. The rule of thumb in the renewable energy industry is that for every dollar invested replacing inefficient appliances, three dollars is saved in the cost of a renewable energy system to run them.
LED bulbs replace 75W-100W incandescent bulbs with equal light output while consuing a ere 3W-13W. They last upward of 50,000 hours meaning if you leave a new LED bulb on for 8 hours/day it would not need to be changed for over 10 years. They are very efficient, use little electricity and therefore result in an immediate decrease in your electric bill.
Your utility bill, supplied monthly by your electric provider, is reported in Kilowatt Hours (KWh) of use (1 Kilowatt = 1000W).
To determine KWhs, multiply Kilowatts by number of hours of use. Therefore, a 60W light bulb used 5 hours a day consumes 300 watt hours or 0.3KWh of electricity.
Electricity is measured in units of energy called watts, named after James Watt, the inventor of the steam engine. Watts is generally defined as the amount of power (or energy) an appliance uses (consumes) when operated at its maximum capacity for 1 hour . Amps on the other hand is defined as how much energy an appliance draws, or the rate of energy that flows through wire when an appliance is used for 1 hour. Finally, volts is what energizes the appliance or it is the force that pushes electricity through wire to the appliance. You can determine power characteristics of an appliance if watts rating is not provided, by the following equation: V (Volts) X A (Amps) = Watts (Ohm's Law)
A=W/V
V=W/A
To determine Amps consumed by a 25watt 12V light bulb, for example, use the equation A=W/V or (25/12=2.1Amps). Therefore, adding up amps figures for the various appliances you intend to plug into a Sunrnr will give you the total electrical load you will put on the equipment (or demand that it powers).
Please note that the proper selection of AC or DC appliances is an important factor, because it is better to have the power source and appliance working at the same voltage, so that, in a manner of speaking, nothing is lost in the conversion. For instance a 12V DC electrical circuit that supports a refrigerator will use power more efficiently if the refrigerator also operates at 12V DC. The efficiency level is lessened if a 12V AC powered refrigerator is connected to a 12V DC electrical circuit using an inverter.
Also, LED (light-emitting diodes) bulbs and Energystar rated appliances consume less energy and operate more efficiently. You can therefore run more of these types of appliances on a Sunrnr. Appliances that run at 240V AC- such as electric water heaters, cook-stoves, furnaces and air conditioners, are impractical loads to run on solar- whether generator or grid-tie. Alternatives such as LP or natural gas for water/space heating or cooking, evaporative cooling instead of compressor based AC units, and passive solar ideas are cost-saving options. The rule of thumb in the renewable energy industry is that for every dollar invested replacing inefficient appliances, three dollars is saved in the cost of a renewable energy system to run them.
LED bulbs replace 75W-100W incandescent bulbs with equal light output while consuing a ere 3W-13W. They last upward of 50,000 hours meaning if you leave a new LED bulb on for 8 hours/day it would not need to be changed for over 10 years. They are very efficient, use little electricity and therefore result in an immediate decrease in your electric bill.
Your utility bill, supplied monthly by your electric provider, is reported in Kilowatt Hours (KWh) of use (1 Kilowatt = 1000W).
To determine KWhs, multiply Kilowatts by number of hours of use. Therefore, a 60W light bulb used 5 hours a day consumes 300 watt hours or 0.3KWh of electricity.
Energy Watts/Amps Guide (Estimated)
110V AC Appliances- Watts to Amps Conversion (A=W/V)
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WATTS DC Amps
Blender 300 30.0 Blow Dryer 900 90.0 Cappuccino machine 1250 125.0 Clock 1 0.08 Coffee maker (brewing) 800 80.0 CD/DVD Player 35 3.5 Compact Fl. Light Bulb-CFL 40W equiv. 11 1.10 CFL- 60W equiv. 15 1.5 CFL- 75W equiv. 20 2.0 CFL- 100W equiv. 26 2.6 Computer- Laptop 60 6.0 Computer-Desktop 100 10.0 Computer inkjet Printer 70 7.0 Crock Pot- 6 Qts. 270 27.0 Curling Iron 1000 100.0 Dish Washer 1200 120.00 Electric Blanket 200 20.0 Electric Fan- 21" Box (High) 166 16.60 Electric Fan- 21" Box (med.) 117 11.70 Electric Fan- 21" Box (Low) 87 8.7 Electric Skillet 1000 100.0 Fan-table 18 1.80 Freezer 500 50.0 Hair Dryer 1500 150.0 Iron 1000 100.0 Light- Incandescent 40 4.0 Light - Incandescent 60 6.0 Light- Incandescent 75 7.5 Light- Incandescent 100 10.0 Light- Incandescent 40 4.0 Light - Incandescent 60 6.0 |
WATTS DC Amps
Light- Incandescent 40 4.0 Light - Incandescent 60 6.0 Light- Incandescent 75 7.5 Light- Incandescent 100 10.0 Light- 60W LED 3 0.30 Microwave- 1000W 1100 110.0 Power tool- Belt Sander 500 50.0 Power tool- Bench Grinder 370 37.00 Power tool- Chain Saw 1200 120.00 Power tool- Circular Saw 1320 132.00 Power tool- Drill, Jig Saw 360 36.0 Power tool- Portable Charger 5 0.50 Power tool- Soldering Iron 20 2.0 Radio Telephone- Receive 5 0.50 Radio Telephone- Transmit 40 4.0 Refrigerator- 14 to 20 cu.ft. 30 3.0 Satellite Dish 30 3.0 Shaver- electric 15 1.50 Space Heater 1200 120.00 Stove- electric 800 80.0 Sump Pump- 1/6 HP 880 88.00 TV- 12" B&W 30 3.0 TV/VCR Combo- 13" Color 50 5.0 TV- 25" Color 100 10.00 Toaster 1000 100.00 Toaster Oven 1200 120.00 Vacuum- handheld 150 15.00 VCR 40 4.0 Waffle Iron 1200 120.00 Washer 600 60.00 Water Heater 4500 450.00 Well Pump 1000 100.00 |
Common 12V DC Appliances
Amps to Watts conversion ( V x Amps=Watts)
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DC Amp Draw
Autopilot 2.0 Bilge Pump 4.0 Blender 8.0 CD/DVD Player 3.2 Coffee Maker 10.0 Curling Iron 1.3 Depth Sounder (Backlit) 0.1 Fan- 14" Box (High) 2.8 Fan- 14" Box (Low) 1.2 Fan- 7" (High) 1.3 Fan- 7" (Low) 0.6 Food Processor 9.0 GPS- Fixed Mount 0.5 Grill- Similar to G.Foreman 15.0 Hair Dryer 14.0 Heated Blanket- single 4.2 Heated Blanket- double 6.7 Heater- ceramic 15.0 Laptop Computer 3.0 Electric Marine Head 1.3 Light- 5W 0.4 Light- 10W 0.8 Light- 20W 1.7 Light- 25W 2.0 Light- 55W sealed beam 4.6 Light- 16W Fluorescent 1.4 Light- 30W Fluorescent 2.2 |
DC Amps Draw
Light- 400,000 Candlepower 5.5 Light- 300,000 Candlepower 10.0 Microwave- 450W 65.0 Popcorn Maker 13.0 18V Power tool- 12V recharger 4.0 Radar Antenna 3.0 Radio- handheld rechargeable 2.5 Refrigerator- LP Gas Mode 1.6 Refrigerator/Freezer- 9 Cu. Ft. 2.9 Refrigerator/Freezer- 11.4 Cu. Ft. 5.8 Refrigerator/Freezer- 14.4 Cu. Ft. 5.8 Refrigerator/Freezer- 17.4 Cu. Ft. 9.7 Sandwich Maker 5.0 Saucepan- Eletric 13.0 Television- 13" 4.5 TV Antenna Booster 1.0 Toaster Oven- High 10.0 Toaster Oven- Low 7.3 Vacuum- 1 gal. Wet/Dry 10.0 Vacuum- Hand Held 13.0 Vari Speed Ceiling/Vent Fan 4.0 VCR Recorder/player 2.0 VHF Radio- transmit 5.0 VHF Radio- Standby 0.06 Water Pump- 1 gal/m 1.0 Water Pump- 2 gal/m 5.5 Water Pump- 3.5gal/m 8.5 |
What appliances can the Sunrnr run and for how long? And how does the Sunrnr compare to other generators?
