The Yamaha EF1000iS inverter generator is the ultimate in lightweight portable electricity that is quiet, durable and convenient. Designed to supply high-quality and clean power, the EF1000iS was built to be quiet and durable. Designed with an all-new ergonomic style and fitted with a compact alternator and inverter unit, the EF1000iS weighs in at a class-leading 27lbs, making it extremely portable. Noise Block, acoustically designed sound reduction system helps to make the EF1000iS the quietest portable generator in its class. The EF1000iS… lightweight, powerful, clean and quiet. A powerhouse performer at your fingertips.

CLEAN OUTPUT
The EF1000iS - with its inverter system - features Pulse Width Modulation (PWM) so Voltage stability is within ± 1%, and Frequency stability is ± 0.1 HZ. Its pure sine wave is as clean or cleaner than commercial power, improving the efficiency and versatility of your electronic equipment and accessories compared to other portable power.

NEW!

The combination of the world's first aluminum die-cast frame on a portable generator, an aluminum TCI rotor and other weight-saving measures have produced a powerful and compact generator that weighs only 70 pounds. Using the engine from our larger models achieves the highest output level in the class—enough juice to power up most 13,500 BTU air conditioners.

Using that powerful engine also means it can run at lower rpm; Smart Throttle™ automatically adjusts engine speed to match the load. The result is quiet running, maximum fuel efficiency, and a run time of over 8.5 hours at 1/4 capacity load. The aluminum flywheel allows the engine to respond quicker to changing loads. Special, Field Effect Transistors in the electronic controller respond more quickly for greater big-appliance starting capacity, and a cast iron cylinder liner means increaed reliability and superior heat dissipation for longer engine life.

Clean power is key. The EF2400iS uses Pulse Width Modulation (PWM) to produce high-quality electricity on the same level as that supplied by public utility companies. That means you can use this generator with confidence as a power source for microcomputer-controlled power tools and appliances with built-in computer functions.

LESS NOISE
Generators can be loud and annoying — and that can be a problem whether you're providing backup power at home, camping in the wilderness, or working on the job site. With the EF2800i, Yamaha has created one of the most quiet generators in its class. The engineers looked at the total design and then made changes where they would be most effective — i.e., engine operating speed, intake noise, exhaust noise, and valvetrain noise. The most important addition is something we call "Economy Control." Here's how it works: Typically, after starting a generator — as it's generating power — the generator operates at a constant rpm to produce peak power. This is usually the loudest noise level. With "Economy Control," the engine speed automatically changes to match power demand. Therefore, if you're powering only some small appliance or lights, the generator runs at a low engine rpm. Then, as power demand increases, the engine revs up accordingly.

LIGHTWEIGHT
It's not uncommon to have generators weighing over 120 lbs. And weight usually corresponds to power output. That is, until Yamaha created the EF2800i. Tipping the scales at just 64 lbs., it's the lightest generator in its class. The key is its multipole rotor with a small stator and Pulse Width Modulation inverter. This design is smaller and lighter than a conventional two-pole alternator and large stator — and it makes the EF2800i extremely portable.

CLEAN OUTPUT
Most generators can't power anything with microcomputers or sophisticated electronics — their generated power has too many spikes and irregular wavelengths that can destroy sensitive equipment. The EF2800i — with its inverter system — features Pulse Width Modulation (PWM) so wavelength distortion is less than 2.5 percent — it's ideal for equipment that requires stable frequency and voltage.

Strengthening the core of our inverter lineup are the Yamaha EF3000iSE and the EF3000iSEB, two of the most revolutionary inverter models available today. Ever need a little boost - extra power that gets your tool or air conditioner started quickly and efficiently? Well, now you can get that "boost" thanks to the EF3000iSEB generator from Yamaha. The “B” on EF3000iSEB means it features Yamaha Boost Technology™, which provides additional power when you need it. Perfect for the RV enthusiast, the iSEB is an ideal source of power for either a fifth-wheel or travel trailer system. The Boost Control Unit in the generator automatically senses when additional boost is needed and it uses power from the internal 12-volt battery to produce additional amperage. In fact, the additional amps boost the alternator's 3000-watt output for up to 10 seconds, increasing the output so it's comparable to a conventional 3500-watt generator. Supplying that extra boost for 10 seconds is ample time to power equipment that may need that extra kick to start quickly and efficiently, such as a 13,500 btu air-conditioner or other trailer appliances. However, if you find yourself not needing that little extra kick, you can take advantage of the Yamaha EF3000iSE, which includes all the features of the EF3000iSEB but without our Boost Technology feature. Both the iSE and the iSEB include Yamaha's performance enhancing features, such as Inverter Technology, Smart Throttle and Noise Block. So both are capable of producing clean, high-quality electricity with extremely quiet operation (quietest in the industry). Both units also feature a fresh, new ergonomic design with easy control access, effortless electric starting and built-in wheels so they're remarkably portable - providing convenient power to the locations you need it most, whether around the home or at a campsite. The EF3000iSE and EF3000iSEB - generators on the leading edge of technology.

EF4500iS

The all-new EF4500iSE picks up where our extremely successful EF3000iSEB leaves off, with even more power and fuel efficiency in a quiet, portable package. The EF4500iSE is designed for maximum fuel efficiency and minimum noise, qualities which make it the ultimate RV accessory. The most powerful engine in its class allows our biggest inverter to run at the very low engine speed of just 2600 rpm—1000 rpm lower than other generators in its class, and that slow engine speed pays off in reduced fuel consumption as well as less noise, vibration and engine wear. Naturally, it’s got all the features you expect from Yamaha including an optional wireless remote control.