problem to solar maximum power for resistive load
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![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1256497/image.jpeg)
first figure showed power is 315.1w which is maximum power for this solar panel.
when I changed irradiance from 1000 to 500, figure as blow
How come the power is only 87.59w (load keeps unchanged)?
How can I always find maximum point power as load is fixed but irradiance or temperature varys?
thanks.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1256502/image.jpeg)
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Salah
le 8 Jan 2023
You have a constant load in the figure, and you are calculating the power P = IV, so changing the irradiance will always change the output current from the cell thus the voltage, which will vary the power calculated and the load will still be constant.
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Salah
le 9 Jan 2023
You need a system with a feedback and a controller, a controller algorithm can be something like this: MPPT Algorithm - MATLAB & Simulink (mathworks.com)
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