I have posted this thread at a couple of places and every time I am missing a key component of the explanation... Here is the problem.

A solar panel is connected to a DC-DC converter with MPPT and then to a 400V DC microgrid. All is well. Now the MPPT tries to vary the duty cycle of the converter and by doing so it changes the way the panels experience the load hence changing the voltage on the side of the solar panels. But wait. Changing the duty cycle of a DC-DC converter changes the output hence you have a DC-DC converter with changing voltage at it's output. The load is constant (imagine a single resistor). The voltage at the microgrid is also constant 400V DC. I mean all grids suppose constant voltage. Then the missing link is how does MPPT even work when we have a constant voltage output.

I have not seen a single post yet explaining how exactly in real life this works. I can only see people explaining the idea. Yes the MPPT tracks the power point , yes it tracks the current and voltage and changes the duty cycle thus varies the load. But no one gives the exact explanation of how this actually works. Right now it seems to me that it does not work at all. With just a varying DC-DC converter duty cycle.

I want to have a solar panels with MPPT in a 400V DC microgrid with a constant load. How do we accomplish this. Theoretically.