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| Effects of shading on one or two strings http://solar-guppy.com/forum/viewtopic.php?f=3&t=571 |
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| Author: | peter johnson [ Fri Aug 10, 2007 2:55 pm GMT EthGMT ] |
| Post subject: | Effects of shading on one or two strings |
Hi, I have a south facing roof that is clear for most of the day but is partially shaded by trees in the morning and evening. I'm trying to work around the shading, can anyone tell me which of these two options is better or does it matter? One option is to have one string of panels that would be partly shaded before 10am and after 4:30pm The 2nd option is to have two strings, and eastern string shaded before 10 and after 5:30, and a wester string shaded before 9:00 am and after 4:30. Thanks |
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| Author: | Solar Guppy [ Fri Aug 10, 2007 5:22 pm GMT EthGMT ] |
| Post subject: | |
First option for sure ... that way one array is always giving its most and the second comes in and out ... Sun from 9 to 4 will get about 60-90% of the clear view harvest, depending on the time of year ( summer are longer days and would be more impacted ) |
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| Author: | peter johnson [ Fri Aug 10, 2007 10:29 pm GMT EthGMT ] |
| Post subject: | |
Thanks for the quick reply. So if I understand you the single string is better, because it's going to get most of the full days sun anyway? Pete |
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| Author: | Solar Guppy [ Sat Aug 11, 2007 7:43 am GMT EthGMT ] |
| Post subject: | |
Yes, the shaded panels will just be bypassed ( internal diodes ) and the GT inverter will just track to the lower voltage .. this works best with a single string |
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| Author: | klacc [ Tue Nov 08, 2011 5:27 pm GMT EthGMT ] |
| Post subject: | Re: Effects of shading on one or two strings |
I agree with solar guppy. The first option is the better choice. |
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