Wattage Estimation Guide

Transcription

1 Estimation Guide Tip: Don't just add up the total wattage for everything you want to power. See the section on power management to learn how to use a smaller generator to power more. Home Applications 240V required? Refrigerator or Freezer (Energy Star) Microwave Oven 650 watts watts watts Incandescent Lights as indicated on bulb (i.e. 60W) as indicated on bulb (i.e 60W) Furnace Fan, gas or fuel oil 1/8 Horsepower Y 1/6 Horsepower Y 1/4 Horsepower Y 1/3 Horsepower Y 1/2 Horsepower Y Television Tube type Flat Screen (20 ) Flat Screen (46") Coffee Maker (4 cup) Dishwasher (Cool Dry) Electric Fry Pan Electric Range (8-inch element) Y Automatic Washer Clothes Dryer (Electric) Y Radio 50 to to 200 Sump Pump 1/3 Horsepower Y 1/2 Horsepower Y Window Air Conditioner (10, BTU) Computer Laptop

2 240V required? Desktop Monitor (LCD style) Printer Hot Water Heater Y Garage Door Opener Recreational Applications Television Tube type Flat Screen RV Air Conditioner BTU BTU BTU RV Refrigerator Blender Electric Grill (tabletop) Slow Cooker Hair Dryer (1600 watts) Microwave Oven (650 watts) Coffee Maker Radiant Heater Laptop computer Satelite Receiver Radio 50 to to 200 Two-Way Radio 12A 360W 360W 23A 840W 840W 35A 960W 960W Fan (portable) DVD Player V required?

3 Contractor Applications Air Compressor 1/2 hp hp Bench Grinder (8 in.) Circular Saw (Heavy Duty, 7 1/4 in.) Concrete Vibrator 1/2 hp 840 (avg) 840 (avg) 1 hp 1080 (avg) 1080 (avg) 2 hp 1560 (avg) 1560 (avg) 3 hp 2400 (avg) 2400 (avg) Demolition hammer 1260 (avg.) 1260 (avg.) Drain cleaner 250 (avg.) 250 (avg.) Drills 3/8 inch, 4 amps /2 inch, 5.4 amps Electric Chain Saw (14 inches, 2 hp) Hand Drill (1/2 in.) High-pressure Washer (1 hp) Rotary hammer 1200 (avg.) 1200 (avg.) Table Saw (10 in.) Industrial Motors Split Phase 1/8 Horsepower /4 Horsepower /3 Horsepower /2 Horsepower Capacitor Start Induction Run 1/8 Horsepower ¼ Horsepower /3 Horsepower ½ Horsepower ¾ Horsepower Horsepower

4 1 ½ Horsepower Horsepower Horsepower Horsepower Capacitor Start Capacitor Run 1/8 Horsepower ¼ Horsepower /3 Horsepower ½ Horsepower ¾ Horsepower Horsepower ½ Horsepower Horsepower Horsepower Horsepower Fan Duty 1/4 Horsepower Farm Equipment Electric Fence, 25 miles Milk Cooler Milker (vacuum pump, 2hp) Portable Heater (kerosene, diesel fuel) 50,000 BTU ,000 BTU ,000 BTU Battery Charger 15 amp amp with 250-amp boost 1500/ /5750

5 Power Management: Get more power from a smaller generator Power management is a great way to maximize the efficiency of your generator. Using power management can help you to: Use a smaller, less expensive generator to meet your needs Use the generator more efficiently Power management works because of one simple concept: it is not necessary to power everything at the same time. Switching from one appliance to another will help to minimize the amount of power needed. Consider: What is most important to power? Does it have to be run continuously? Don't try to run everything at once. For instance, let's say you are using a generator to power your home. You want to run some lights, a refrigerator, a furnace, a television, and a microwave. Appliance Starting Running Refrigerator Furnace (1/4 hp fan) Lights TV Microwave Total If you only look at the total watts, you might think you need at 5300 watt generator to power your home. But that's not really the case. 1. Start appliances with high starting wattage requirements at different times. In our example, if you start the refrigerator and the furnace at separate times, you don't need 3200 watts of power - only If an appliance is only being used occasionally for short periods, run it by itself. Turn off the fridge and furnace for a few minutes while you use the microwave - a small tradeoff like this saves you 1500 watts. 3. Consider how willing you are to turn less important appliances off. If you don't mind turning off the lights and TV, you can use a smaller model. But if you don't want the hassle, opt for a larger generator.

6 Let's look at our example again. Continuous Power Need Running fridge 200 Running furnace lights 300 TV 300 Total 1400 Occasional Power Need Starting fridge 1600 Starting furnace 1600 Microwave 1500 Max 1600 In this case, a 3000 watt generator would be able to run everything easily. And you don't need to sacrifice a thing. Of course, you can get away with as little as 1600 watts - if you are willing to run the furnace and fridge at separate times, and turn off the TV and lights when you start up one or both of these larger appliances.