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RENEWABLE ENERGY SYSTEMS & COMPONENTS
Inverter
Waveforms
written
by James Cormican
When
shopping for an inverter, many folks ask about the practical differences
between modified square/sine wave inverters and those
advertised as sine wave or pure sine wave
inverters.
With
regard to functionality, all of the inverters will run most loads
just fine. The modified sine wave models may have some unexpected
side effects as a trade off stemming from their generally lower cost.
Modified
sine wave inverters may:
* Run resistive loads just fine
* Run motors hot
* Create a buzz or whine from motors
* Create interference with tv and radio reception
* Disrupt timers or digital clocks
* Disrupt washing machine controls based on timers
* Damage battery chargers or batteries, especially for rechargeable
power tools
* Damage high end stereo equipment
* Void warranty coverage on many appliances, electronic equipment,
or computers
Pure
sine wave inverters, on the other hand, with generally meet or exceed
the quality of electricity supplied from the power company. The peak
voltage, and RMS voltage of these waveforms from inverters will generally
match that of the grid or come very close. The quality of the sine
wave output for pure sine wave inverters, will generally ensure the
proper operation of all types of AC loads.
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