What happens to input power when inverter switched off?

AI Thread Summary
When an inverter in a photovoltaic (PV) system is switched off, the input power effectively becomes zero because the current (I) produced by the PV panels drops to zero, regardless of the voltage (V) remaining relatively stable. This indicates that when the inverter is off, it does not draw power from the panels, leading to no power output (P=VI=0). The discussion raises questions about the inverter's disconnection from its source and the implications of resistance changes, but ultimately, the key point is that power production halts when the inverter is not operational. The inverter's operational state directly affects the system's ability to generate usable power from solar energy. Understanding these dynamics is crucial for optimizing PV system performance.
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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?
 
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says said:
What happens to input power when inverter switched off?

define that question clearer ... switched off ... where ?
before or after the input ?
what sort of inverter ?then this Q may be answered better
says said:
I noticed that voltage does not change much but the current does. Does this mean the resistance increases?
Dave
 
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.
 
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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