zanydroid
Solar Wizard
Which page is that graph from?
Hyperion bifacial 400W panel string drops 80% when one panel shaded
- Thread starter axum
- Start date
Suijkerbuijk
I cannot be held responsible for this information.
Looks a nice explains.
Think about it the bifacial solar panels works.
Explained: Bifacial Solar Panels - Saur Energy International
Using Bifacial Solar panel may result in an increase in output by as much as 30%. Bifacial cells shared half the solar cells market in 2021.
www.saurenergy.com
Than one panel in a shaded that will have a good in pack on the rest
I had a similar situation where two panels would get shaded at different times throughout the day. The power would drop from 3000 to 200 watts when only one panel was partially shaded. From my what I’ve observed, the bypass diodes only worked when it was an overcast day or when the sun was no longer directly hitting the panels.
I ended up buying two Tigo Optimizers and installed them without the Tigo TAP and CCA.
It made a huge difference and with them the power only dropped to about 2500 watts. The Tigo Optimizers work much better with hard shading conditions where the bypass diodes never seem to work.
Last edited:
jpwhit
New Member
I just followed the link you posted and scrolled down just a little bit. It's the second illustration on the page where that link lands you.
jpwhit
New Member
I don't completely understand why bypass diodes are so often misunderstood. But is suspect a couple of factors that likely probably contribute.
First a lot of what written often talks about it from the theoretical simple case of one bypass diode per each cell. Because that's a lot easier to explain and understand. But they don't make a good association or transition to the practical world where panel makers can only cost effectively put a few number of diodes in the panel around a fairly large groups of cells.
Second, it involves negative voltages and putting a diode around an energy producing component which is a pretty unusual scenario. As a result, common sense tends to lead you astray when trying to wrap your head around it. It's a case where classic EE circuit theory analysis techniques helps keep you oriented.
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