Thanks Harold!
MPP is definitely is around highest output current, however I see no
simple way to adjust feedback based on something that must be
dynamically sought up and down?
Constant input is just not a given when thinking about the moving
shades and reflections a moving vehicle is exposed to all the time!
However you do touch an important issue, as the normal circuit would
in the effort to achieve output target, possibly drag the input down,
way out of the MPP range!

Let me see what you guys think about this type of pseudo code for the
MPPT algorithm:

D=3DFeedbackScanVoltageStep (Positive or Negative)
F=3DFeedbackVoltage
loop:
  P=3DPreviousOutputCurrent(A)
  F+=3DD
  A=3DMeassureOutputCurrent()
  if(A>P) Direction might be good, continue loop
    else D=3D-D, continue loop



On 2/23/15, Harold Hallikainen <harold@hallikainen.org> wrote:
> One clever thing I learned from Linear Technology is that the maximum
> power point is very close to a constant voltage out of a solar panel. So,
> a very simple MPPT converter is a constant voltage converter where you
> take the feedback from the INPUT instead of the output. The switcher
> adjusts the duty cycle as required to keep the input voltage constant.
>
> Harold
>
>
>
>
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Tobias Gogolin
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You develop Sustainable Ranch Technology at
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