Inverter generators are a special class of generator that use an electronic inverter module to convert energy from the engine alternator to an AC voltage and frequency.
The inverter technology delivers very accurate sine wave output which is regulated to meet the load demand. It can also control the engine RPM so that at lower loads, the engine speed is reduced to lower engine noise and fuel consumption.
Determining Your Energy Needs
With a Generator Size Matters
This section will assist you in estimating the power requirements so you can purchase the generator that will satisfy your needs.
Once you have the list, you can estimate the highest demand that will be put on the generator under the "worst-case" conditions. With this figure, you can determine the appropriate model Yamaha generator for your particular needs.
WARNING: Electrocution, severe personal injury or death can occur: Do not connect any generator to any building's electrical system unless an isolation switch has been installed by a licensed electrician. Refer to the Generator Owner's Manual.
CAUTION: Property damage can occur: Do not connect any generator to any building's electrical system unless an isolation switch has been installed by a licensed electrician. Refer to the Generator Owner's Manual.
TAKE IT STEP-BY-STEP
1. Identify the wattage requirements for the tools and appliances that you want to power. The power requirement for the tool or appliance can be found on its identification plate or in the Owner's Manual. If the power requirement is given in amps, multiply the amps times volts to derive the required watts.
Amps x Volts = Watts
2. Add up the required watts of all the tools and appliances you expect to operate simultaneously.
3. The total watts derived in step 2 is the size Yamaha generator you need. These three simple steps will "size" a generator.
The Additional Guidelines section explains the procedures to calculate and size for motor starting.
This chart lets you immediately add up all of the appliances you will most likely utilize:
CONVERTING AMPS OR HORSEPOWER INTO WATTS
Watts = Amps x Volts
Running Watts* = Horsepower x 932** (for motors)
Remember, this worksheet lists average power requirements — a particular manufacturer's device may use more or less than the listed wattage.
If your customer plans to operate devices that use electric motors, list both the starting and running requirements of each.
When listing items that use motors, take them in the order of highest-to-lowest starting requirements, as shown in the example below. Motor A, for instance, has a starting requirement of 2,600 watts, so it's listed first, followed by Motor B at 1,300 watts, and Motor C at 1,000 watts.
Once you have compiled an accurate list of what you will be operating, you can calculate the maximum power requirements. There are three different calculations you can make, depending upon the kinds of tools and appliances on the list, and their intended use:
NO ELECTRIC MOTORS
NOTE: The EF1600's rated output is 1,400 watts, so its output would be too low to handle this load on a continuous basis.