Inverters need to simulate this alternating current and basic inverters do it using crude electronic switches . These basic inverters are called ‘ modified sine wave inverters ’. This rapid switching of the power is no good for sensitive electronic devices . A pure sine wave inverter uses complex electronics to smooth out this alternating or switching current , making the output power more like the power supply you get at home . The below shows the difference in power output displayed as a graph .
Pure sine wave inverters are standard fare for RVs these days but you need to be aware of the other type as they are usually much cheaper than pure sine wave inverters . If you ’ re shopping around for an inverter and the price seems comparatively cheap , it is likely to be a modified sine wave inverter . Avoid them .
WHAT SIZE INVERTER DO I NEED ?
Determining the size inverter you need is much the same as sizing a generator . Inverters are generally rated in watts . Fortunately , almost all 240V appliances will also be rated in watts . You can find this rating in the specifications of the device , which will normally be printed on the serial number label on the device itself or in the owner ’ s manual .
Let ’ s say we have a power supply for a laptop computer and on the label showing a rating of 50W . To power this , you will need an inverter of at least 50W . If you have a 300W inverter , theoretically you could power six laptops from it . However , there is one small complication : most inverters will have two ratings . One is the peak output ; the other is the nominal output . The peak output refers to what the inverter can output for a short period of time , whereas the nominal output is what the inverter can sustain for
DIFFERENCE BEWEEN PURE SINE WAVE AND MODIFIED SINE WAVE INVERTER OUTPUT
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