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How to choose a generator?

Introduction of selecting the proper generator.

STEP 1 The timing, location, and purpose of operating the generator.

First, the scenario and/or objective in which a generator is operated should be clearly identified to select the type of the generator that is most suitable for the scene and/or objective in question.

Example

STEP 2 The power consumption and startup power of electrical equipment should be checked.

The power consumption and startup power of the electrical equipment that will be used should be checked. It should be noted that equipment may require startup power that exceeds the power consumption and that is three to four times the power indicated on the nameplate.

(Example)
Electrical product with a startup power identical to the power consumption
Examples include PCs, 37-inch TVs, and electric pots.

Electrical product with a startup power that is 1.1 to 2 times the power consumption
Examples include microwave ovens, household electrical fans, and electric circular saws.

Electrical product with a startup power that is 2.1 to 4 times the power consumption
Examples include household refrigerators, air conditioners, and mercury lamps.

Approximate startup power: One time of power consumption
Electrical product power consumption(W) approximate startup power(W)
Notebook PC 200W 200W
37-inch TV 300W 300W
Coffee maker 650W 650W
Electric pot 1,000W 1,000W
Electrical product power consumption(W) approximate startup power(W)
Halogen heater 1,000W 1,000W
Household rice cooker 1,300W 1,300W
Hot plate 1,300W 1,300W
Approximate startup power: 1.1 to 2 times the power consumption
Electrical product power consumption(W) approximate startup power(W)
Household electrical fan 50W 100W
Halogen light 250W 500W
Electric drill 300W 600W
Impact wrench 500W 1,000W
Electrical product power consumption(W) approximate startup power(W)
Electromotive circular saw 600W 1,200W
Microwave oven 1,000W 1,800W
Electric planer 1,200W 2,400W
Electric nailing machine 1,500W 3,000W
Approximate startup power: 2.1 to 4 times the power consumption
Electrical product power consumption(W) approximate startup power(W)
Household refrigerator (small) 100W 400W
Small cooler 200W 800W
Household refrigerator (large) 250W 1,000W
Electric lawn mower 400W 900W
Electrical product power consumption(W) approximate startup power(W)
Mercury lamp 400W 1,600W
Submersible pump 500W 2,000W
Air compressor 750W 3,000W

STEP 3 Add the startup powers of all the electrical equipment that was used simultaneously, and select the generator that is most suitable for a given need

Adding the startup powers of electrical equipment that could be simultaneously used will help in determining the type of generator that can provide the required power. This is followed by comparing the total power with the rated output power shown in the catalogue. The rated output power (or simply “output”) is the power that the generator can stably generate, and it is denoted as “VA” in the unit.

The rated output is shown at the top of the product catalogue.

Watt (W) vs. Volt–Ampere (VA)

Both these units of measurement express the quantity of electricity consumed in a second, which is also known as electric power. However, they have different units, namely, W for power consumption and VA for rated output. That is, electric quantity consumed by electrical equipment is expressed as Watt (W), and electric quantity generated by a generator is expressed as Volt–Ampere (VA).

STEP 4 The generator is chosen from three types: “Inverter,” “FW,” and “Standard.”

Yamaha generators can roughly be classified into three configurations, i.e. "Inverter," "FW," and "Standard," each with different characteristics. The type will be selected to match the application situation. First, the Standard type adopts a simple structure, which is inexpensive and yields high output. The Inverter type provides high-quality electricity and can also be used safely in precision equipment such as a personal computer with a built-in microprocessor; it consumes low amounts of fuel and is compact. The FW type can be considered as a generator with intermediate characteristics; that is, it produces better-quality electricity than the Standard type and has a more reasonable price than the Inverter type.

The generator can be made more versatile by using relevant accessories.

The generator can become more versatile by using accessories including a special cord to allow parallel generator operations and canisters that enable easy generator transportation.

Points to be noted

Use the generator only after having read the instruction manual carefully.

Models recommended according to use and scenarios

Leisure
Home Carpentry
Outdoor events
Construction work
Emergency use in the events such as natural disasters (General household)
Emergency use in the events such as natural disasters (Office)
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