Solar and A Brief Encounter with Leafy Shade
Morning solar with a tree 40’ away. 3x250W series poly panels and 3 bypass diodes per panel. Past 7:50 AM the MPPT controller is decreasing the array voltage as it seeks the maximum power from the arr...
Forum Discussion
Wiz,
For a given point it time with the given sun and panel temperature MPPT seeks the maximum power from the array. This is shown on the knee of the IV curves. The controller seeks this point with less power to the left (lower voltage and higher amps) and less power to the right (higher voltage and less amps).
Perhaps this is accomplished by adjusting the array resistance, voltage or amps. I'll see if I can find a better general explanation of how this is accomplished.
Generally MPPT can produce about 5% more power than PWM and tends to lose that advantage with increasing panel temperature.
For a given point it time with the given sun and panel temperature MPPT seeks the maximum power from the array. This is shown on the knee of the IV curves. The controller seeks this point with less power to the left (lower voltage and higher amps) and less power to the right (higher voltage and less amps).
Perhaps this is accomplished by adjusting the array resistance, voltage or amps. I'll see if I can find a better general explanation of how this is accomplished.
Generally MPPT can produce about 5% more power than PWM and tends to lose that advantage with increasing panel temperature.
