This Pulse Width Modulation (PWM) type inverter are cheaper mostly used in off-grid solar in households and commercial applications. PWM inverter works on switching basis with following operation philosophy with help of contactor,

  • During the battery deep discharge, contactor ON & inverter work as boost mode.
  • Contractor flicked ON & OFF as needed to hold the battery voltage at the absorption voltage.
  • Contractor OFF at the end of absorption while the battery voltage drops to the float mode.

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