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Old 02-17-2019, 06:13 PM   #1
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Default Partially covered solar panel output

If a solar panel was to be partially covered, say from 1 to 15%, with snow is the output of it going to be reduced proportionally, or is the entire panel gonna be at 0 watt output? 2 panels in series mounted side by side.
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Old 02-17-2019, 06:18 PM   #2
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No, it's way worse than proportional. A single shaded cell will reduce the current of the whole series string to the current produced by that shaded cell.


I think it can be something like 70-80% reduction in output.
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Old 02-17-2019, 06:20 PM   #3
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Not proportional. WAG 5% cover 30% or more loss.
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Old 02-17-2019, 06:28 PM   #4
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What CW said. I remember from PV class they kept making a big deal about shade, leaves, angle's, and any other thing that could possibly block maximum light from reaching the panel. Even a single cell could screw up the whole string. What you need is a giant hair drier on a cycle timer to melt the snow.
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Old 02-17-2019, 07:24 PM   #5
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Quote:
Originally Posted by glen1971 View Post
If a solar panel was to be partially covered, say from 1 to 15%, with snow is the output of it going to be reduced proportionally, or is the entire panel gonna be at 0 watt output? 2 panels in series mounted side by side.
it will be worst than you think on this .,,

just think of automotive battery with 6 cell in series if one gone bad the whole shenabang will go out once.

same way with solar panels if one is covered with snow the other will affect a bit.
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Old 02-17-2019, 07:30 PM   #6
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Worse than what is stated above. It can cause back feeding to the shaded panels and create kaboom.
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Old 02-17-2019, 10:38 PM   #7
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Solar farm I worked in Arkansas had small resistance heaters behind every panel.
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Old 07-16-2019, 08:59 AM   #8
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Solar farm I worked in Arkansas had small resistance heaters behind every panel.
I'd love to work at a solar farm
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