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What happens to input power when inverter switched off?

  1. Apr 24, 2016 #1
    In a PV system, what happens to input power when an inverter is switched off?

    I noticed that voltage does not change much but the current does. Does this mean the resistance increases?
     
  2. jcsd
  3. Apr 24, 2016 #2

    davenn

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    define that question clearer .... switched off .... where ?
    before or after the input ?
    what sort of inverter ?


    then this Q may be answered better

    Dave
     
  4. Apr 24, 2016 #3
    After the input power. So the sun is still shining on the PV panel, but the inverter is switched off.
    I don't know much about inverters to answer your last question, sorry.
     
  5. Apr 24, 2016 #4

    anorlunda

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    If you disconnect a PV panel from its load, no power is produced. Power P is voltage times current, ##P=VI##. Therefore if ##I=0## then ##P=0##.regardless of ##V##.

    If you wish, you can view an ideal switch as a device that changes resistance from ##R=0## when closed to ##R=\##infinity when open.

    Does an inverter really disconnect from its source when off? I'm not sure about that.
     
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