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Pure Sine Wave Inverters vs. Modified Sine Wave Inverters
Jun19

Pure Sine Wave Inverters vs. Modified Sine Wave Inverters

True Sine Wave or Modified Sine Wave?Because the AC electricity from the electric grid is in the form of sine wave, the inverters we use aim to produce a current that is as close to sine wave as possible.  While modified sine wave inverters present an inexpensive alternative, there is no comparison to the clean, undistorted sine wave provided by pure sine wave inverters.   Pure Sine Wave Inverter    A pure sine wave inverter, also known as a true sine wave inverter, produces a clean, undistorted electrical output.  Depending on the manufacturer of the product, pure sine inverters have a perfect sine wave output that’s in phase with the AC grid of the utility company.  Because of the sinusoidal form, pure sine wave inverters are used for grid-tie solar systems and work for virtually any AC load.  Cotek SK3000-148, 3000 Watt 48V Pure Sine Wave Inverter Because they produce no harmonic distortions in the frequency, pure sine wave inverters allow any electronic device to function well without overheating or creating an irritating “buzz” sound.  Though pure sine wave inverters are undoubtedly the best and most versatile kind of inverter, they are more expensive than modified sine wave inverters.   Pure sine wave inverters are necessary for highly sensitive products such as digital clocks, audio equipment, and video-game consoles.  As a general rule of thumb, if you’re powering any electronics, you’ll probably want to stick with a pure sine wave inverter.  The image below displays the difference between a pure sine wave and a modified sine wave.   Modified Sine Wave Inverters   The cheaper alternative to a pure sine wave inverter is a modified sine wave inverter.  A modified sine inverter converts DC electricity to a nonsinusoidal AC wave that is “modified,” or distorted.   When an inverter produces modified sine wave, the voltage output (represented in the Y axis of the image) essentially jumps from zero volts to positive, where it plateaus and drops back to zero, to negative voltage, and then back to zero again. This is signified in the image by the squared edges seen in the modified sine wave, which is contrasted by the smooth oscillation of a voltage that is produced by a pure sine wave inverter.  The modified sine wave is a stepped waveform that is designed to mimic a true sine wave.  Because it is not a clean form of energy, modified sine wave does generate a certain kind of interference called harmonic distortion (though not as much as a square wave). Modified sine wave inverters can work for the majority of low-end appliances, but take caution when using them for your...

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Off Grid Inverters – Modified Wave vs. Pure Sine Wave

Designing an off-grid solar power or wind turbine systems can be confusing, because of figuring out the sizing requirements of the system by conducting a load calculation off all the appliances that reside within a building. Also you have to understand the difference between Modified Wave and Pure Sine Wave inverter to figure out what type of inverter is right for your renewable energy power generation project. Modified Sine Wave is a rough, noisy electrical signal that does not work with all appliances, although Modified Sine Wave inverters are much more affordable then their Pure Sine Wave counterparts. Have you ever heard a florescent light bulb make that annoying buzzing sound? Well that is the type of feedback you will get when running lights, computers, tvs and most other electronics on a Modified Sine Wave signal. Most electrical equipment will work but will no perform as well as pure sine wave, appliances such as microwaves will not work, laptops may power on be crash often due to the dirty signal Pure Sine Wave is clean electricity, similar to the electricity we get from our utility company. Compatibility is the major advantage of pure sine wave because every appliance and electrical equipment is made for Pure Sine Wave signals. With this type of inverter, you will not have to guess if what you are plugging into your AC outlet will work with your solar power or wind turbine system. The advantages of clean electricity also comes with a higher price...

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