What happens to input power when inverter switched off?

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SUMMARY

When an inverter in a photovoltaic (PV) system is switched off, the input power becomes zero because the current (I) drops to zero while the voltage (V) remains relatively constant. This is based on the power formula P = VI, where if I = 0, then P = 0, regardless of the voltage level. The discussion highlights that disconnecting a PV panel from its load results in no power production, emphasizing the relationship between current and power output in the system.

PREREQUISITES
  • Understanding of photovoltaic (PV) systems
  • Knowledge of inverter operation and types
  • Familiarity with electrical power formulas (P = VI)
  • Basic concepts of electrical resistance
NEXT STEPS
  • Research the different types of inverters used in PV systems
  • Learn about the impact of load disconnection on PV panel performance
  • Explore the concept of electrical resistance in circuits
  • Study the role of maximum power point tracking (MPPT) in inverters
USEFUL FOR

Solar energy engineers, electrical engineers, and anyone involved in the design or optimization of photovoltaic systems will benefit from this discussion.

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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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