To select a Home Standby Generator
Blizzards, Ice Storms, Tornados, hurricanes, a sloppy driver who strikes a power stick theres no end to the natural and artificial disasters that can turn off the power of your home. In the past people would light some light, cook the gas stove and toughen it. But now, with most homes that are almost 100% electric, lost power can be more than an inconvenience. It can be life threatening.
Fortunately, standby power generators, once exclusively used by factories and large companies, are within reach of any homeowner. They are safe, quiet and effective. In fact, the only problem is: Which generator is right for you?
What is Watt?
Generators are sold by wattage rating. If you were absent from school that day, you may not know that wattage is a kind of electricity that corresponds to horsepower. Remember Ohms team? Do not worry, I did not either. Anyway, Watt = Volt x Ampere and Amps = Watt / Volt. While theoretical knowledge is a wonderful thing, here are some more practical tasks that help you choose the right home standard generator for you.
Most electrical appliances have a tag somewhere that will tell at least two of the numbers you need to calculate the right size emergency generator for you. If you have voltages and amps, you can use Ohms team to calculate watts.
Of course, if they list the wolf, youre completely almost. Electric motors require up to four times as much wattage to boot up as they do to keep running. It has something to do with inertia and friction, but I was also absent on that day. So, a good rule of thumb is to multiply the watt on the label or the watts you calculated by 4 if you work with any electrical devices that have a motor.
When it comes to calculating the watt required to run electric lighting, you may have been absent from school for the whole year and get this right. It is printed right there on top of the bulb. This means that if you want to power a 60 watt bulb, then you will consume ... yes, 60 watts of power.
The following chart shows the average effect of the average household appliances. Use these numbers only as a guideline because your devices can be exceptionally common.
Typical Appliances Wattage Requirement Apparatus
multiply watt x 4 to determine the starting requirements for appliences with motors
Coffee maker 1750
0 Dishwasher no heat 700 2800
1400 Electric Fry Pan 1300
Electric Range 8inch element 2100
Microwave 625 watts
Fridge or Freezer 700 2800
Washing machine 1150 4600
Electric Tumble Dryer 5750 23,000
Oven gas or fuel oil 1/8 horsepower 300 1200
1/6 Horsepower 500 2000
1/4 Horsepower 600 2400
1/3 Horsepower 700 2800
1/2 Horsepower 875 3500
Light as printed on light bulb
Radio 50 to 200 0
Color TV 300
10,000 BTU Central Air Conditioning 1500
If you planned to run everything listed above then you might think at first glance that you need a generator of 30,000 watts. Perhaps buying a small nuclear reactor would make a bigger sense. But wait! See what happens when you use a small power management logic to the formula.
Power management 101
The first thing to remember is that maximum power for all motor drives is only used when the engine first starts. Moment later, it falls to the normal running wattage. Then you need to select a generator that outputs enough wattage to handle the device with the highest boot rating. Then, make sure that no two devices are started at the same time and you can dramatically reduce your computation.
The other thing to remember is that the total running column column is just a matter if you plan to drive each device simultaneously and all day and night. So you see, by simply charting a reasonable energy management schedule, you can cut back the size of your requirements. For most, a 2500 watts generator will do the trick.
Although dieselpowered generators are available, they are usually used in commercial and industrial environments. For us homeowners, there is a choice between gasoline and liquid propane gas LPG. As a rule of thumb, the LPG models run quieter than the gasoline models. Fuel consumption varies depending on the engine power of the generator. An 8 HP model will drive about 10 hours + at full load, while a corresponding LPG model runs 1 hour for each 5 kg of fuel it burns.