The Yamaha Inverter EF1000iS from Yamaha was designed to be convenient, versatile, durable, and applicable for many different uses. It is perfect for powering small refrigerators and microwaves either at home or on camping trips. It is extremely light at only 27.9 pounds. Which makes it also very mobile, many can easily carry it. This can partially be attributed to its small .66 gallon fuel tank. Nonetheless, it can operate on one full tank for up to 12 hours. This is due to Yamaha’s smart throttle load sensing technology, which monitors and regulates engine speed to increase efficiency.  This also aids in reducing noise levels. However, it is Yamaha’s Noise Block system that reduces totals to a range between 47dBA and 57 dBA. Often with larger louder models one must isolate them from others; however, 47- 57dBA is very tolerable even by those in close proximity.

Its OHV MZ50 engine with 50 cc of displacement and 2.2 hp produces a max AC output of 1000W and a 12V 8 amp DC output. The DC output comes in handy when recharging 12V batteries. It also comes with an inverter system with pulse width modulation control which ensures a consistent steady stream of clean energy. This enables one to power electronics with microcomputers. The dual coil alternator stator reduces fuel consumption by lowering the speed of the engine. The fuel petcock increases the carburetor’s life by allowing it to run dry. Overall, this is a highly convenient and efficient generator for smaller devices.

Specifics cited from:

http://www.yamahageneratorstore.com/premium.htm

http://www.yamaha-motor.com/outdoor/products/modelhome/442/0/home.aspx