Pure sine wave inverter

Pure sine wave inverter waveforms cross zero cleanly, while Modified Sine Wave waveforms ‘rest’on zero for a few milliseconds. The processor could interpret this rest as multiple zero crosses resulting in the time being calculated incorrectly. Many electronic devices utilize digital time calculations as a function of their operation. Other issues that can occur with MSW inverters are many models of electric blankets, coffee makers, laser printers and other devices that regulate heat using a microprocessor that may not operate correctly.

 How do I determine which power source is right for me,pure sine wave inverter OR Modified Sine Wave?

TECH DOCTOR: To answer that question, you really must consider how you want to use your inverter.
The more complex or state-of-the-art your demand is, the more likely you will want and need to consider a pure sine wave inverter inverter. If, on the other hand, your demand is simple power and you have no aspirations of utilizing today’s sensitive electronic devices either now or in the future, a Modified Sine Wave inverter is the more economical choice.
 More advice,which one you choose depends on what you are planning on running off of it. Pure sine wave is better, ,while modified sine wave will slightly reduce the life of the electrical device you are running off it.If you are only running very basic and cheap electrical devices such as kettles, toasters, cheap devices, save your money and buy a standard inverter. If you were to be running expensive devices such as fridges TV's etc, then spending a bit extra on the pure sine wave inverter is reccommended.