Originally Posted by boat_alexandra
Is there some reason you can't just measure current
from the panel and work off that? Obviously it might turn the wrong way but it would immediately know and correct this.
One time I got above 100% rated power when the sun is low in the horizon because additional light reflected off the water onto the panel.
Measuring current (or more accurately, power) is no help as it varies second to second. Simplest active tracker uses two light sensitive resistors separated by a small vertical blade attached to the panels
with the blade perpendicular to the panel around the axis of rotation. A simple circuit compares the resistance and moves the panels
so that neither resistor is in shade. Does not work so well on cloudy days though.
The active smart tracker on my home array increases output by 30 to 40%, it knows where the sun is every hour of every day of the year regardless of the clouds and it angles the panels appropriately . No use on the boat though.
Interested that you got over 100% output from reflection. Did not know you could do this. I sometimes see 110% from our Kaneka home panels but I assume that will stop happening over time as the panels age.
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