วีดีโอ

I have a touch question, what happen in the shaded part cells? does the current will blow in the lowset resistance single cell and make it hotter?

This is the best video explanation I have seen about the working of diode in solar module with IV curve interpretation. Cleared all my doubts about IV of half cut cell modules. Thanks! Also can you make a video on how diode becomes forward biased when a cell is shaded in a string please?

Amazing video, thank you

If the inverter performs its global MPPT sweep. Does that mean it will find the peak for the whole array? Will one panels being partialy shaded limit the current and even though the 2nd peak is better than with standard panels does that still mean every panel is still reduced to match? I.e If one panel in the array is partially shaded as shown at 6:26 reducing its maximum output to 180W I assume that still means that every panel in the array is reduced to 180W as well?

Hi ,sir please make a video during night condition, how diode bypass current or block

Why you wrote bad information about shade on half cut panel ? One 60Ws section above shadding you forgot. 300W no 240W. You must study before explained !!! Ou ou....

Very valuable info and well presented. Much appreciated.

what about affect of shading on bificial ?

Great video. That last example was what i was wondering. Is it expected that the string inverter with global MPPT will still attempt to sweep the current(?) and then notice that, with all other 8 modules unshaded, dropping the current (to recover some output on the affected module) will not be worth it since it would cut the other modules' output in half? Hypothetically if all modules had effectively similar shading, the MPPT would change the current to at least get something out of them? What about scenarios with not though minimum voltage from the string? There's just so many variables to the shading situation

THIS is the first site I've found that sufficiently explains to my EE brain how the diodes in half-cut function somewhat (potentially) better than full cut and the scenarios that have to play out to make it worth it. I wish I could give more than one thumbs up to this. bravo.

This is good if you are using Microinverters per panel, or if you have connected it in Parallel. Only two panels in series, will have huge power reduction, if MPPT cannot track the MPP of the whole string. So, as we know, one module is Divided into 3 strings using By-pass diodes, and those 3 strings are cut and connected in Parrallel. The problem even with two panels is, if there is some sort of shading in one part of the panel, 1/6, and if the MPPT controller is not able to lower its voltage. All the string will start working at 50% of the power, and if there is no proper sweep function in the MPPT controller, you will be stuck at 50% power unless that shaded part is cleared. Either that, or you will need a really good MPPT controller to properly track the MPP. From my setup, where I use two Half-Cut panels in Series. I get shading from a small wall next to the panels till 9AM in the morning. In somedays, the MPPT tracks 68V, and I get full output from both the panels, except that one string. However, some days, it keeps tracking at 84V, which makes the panels run at 50% of its power, when only one of the strings is shaded 1/12. If I talk in Watts, the total watts 1100 Watts, divided by 1/12, gives 91.6W each. So in my case, I should loose, 2/12 worth of power if its shaded on one part, which is 183.3W. However, due to MPPT not able to track the MPP, I am stuck at generating 6/12 worth of power, instead of 10/12. Which equats to 549.6W instead of 916W. Thats a 50% loss in power production, instead of 16%. So its better to avoid shading or get a really good MPPT controller, or use a Microinverters, or individual MPPT per panel.

Well done to include your own lingo and not just copying the original.

I wonder if someone did real IV measureemtns. Everywhere I see only simulations and mind games. It looks like the only way is to do experiment myself.. My Hoymiles microinverter does not search for global maximum - it just cuts half at small shading. And gives 0 output at shading of 2 cells - one on each side of the panel at. Potentially it should have activated diode, but Hoymiles microinverter does not feel it..

What happens if we lay the panels on landscape setup ?

How do I enroll in the training online. Chatting from Nigeria, west Africa 🌍

Thanks for the video. Got cleared with the doubts regarding fuse selection. It would be of great help if you make a video on contactor sizing and selection for the battery pack

Gg

I have 9x 550w half cut solar panels in a string (4.95kw) ground mounted. And i experience multiple types shading in the winter. Light scattered shading from a tree, total shading from the house (morning only) and single half pannel shading from the apex of my neighbours house. Total shading ruins output... 200-400watts Total Total shading over half the panels is pretty much the same until only 1 or 2 panels are shaded when outout rockets from 300/400watta up to 2kw. Recently with the low sun ive noticed the triangle shadow of the apex of me neighbours house on a single panel. Curious of the output ive seen my sunsynk inverter display show fluctuations in current by as much as 1 or 1.5amps and then some rapid voltage adjustment when the sunlight is pretty consistent. I had a feeling the inverter was searching for a maximum power point... and I'm guessing this is due to the half cut panel characteristics... I have ordered Tigo TS4s as this should help further mitigate some of the shading. Your video explains exactly what I am seeing with shading and I understand why I see the shading effects in power output. Thank you!

Thank you. That was very clear.

We want to give us this opportunity, I'm sure we are the wrighte community

I need for those courses for free as we are teenage who loves to learn about Solar

Very well made video!!

Chainsaw

shingled is the new tech, better than half cut imo

Thanks a lot. I'm really amazed by the way you explain this topic. 👏

Great info that was not included in the salesdeal of my 22 new AEG-AS-M1202B-H(M6)-370W Mono Full Black/ Half cel panels icw with Solaredge S500B power optimisers. New subscriber.

Thank you so much for this video, tracing the current through the sections of the panel was so informative

I am studying the layout for my 6 485w panels and my pitched roof is poorly oriented as it starts to get shadding diagonally at 6pm. If i instal the panels portrait oriented, they will start to shade the top left half, then the bottom left nearly at the same time the top middle half and so on. Is still portrait the best option here? I am glad I found this video as I was almost starting to install them in landscape orientation? They will get installed in sets of 2 for the best exposure.

"inside of the Mobius strip" made me laugh out loud.

Thank you! Among the very best PV explanation videos I've seen. My pleasure to recommend your chan to all my pV friends.

Before I viewed this presentation, I saw one from a guy who was attempting to make a point about how string inverters performed nearly was well as microinverters when panels were shaded. To make his point, he measured open circuit voltage, Voc, then short circuit current, Ish, for two cases, namely with a panel shaded and with all panels illuminated. Since Voc and Ish were similar for both the above cases, this guy then claimed that shading a panel in a string inverter system did not appreciably reduce power production. Unfortunately, I suspect this analysis was WRONG because as your video demonstrates, the I-V curve of solar panels is HIGHLY NONLINEAR. The Voc and Ish can be converted to maximum power delivered ONLY if the system has a linear I-V curve. Thanks again for clarifying this!

Great explanation!

I don't understand why the unshaded area gets half the current instead of the full current while the voltage is equivalent of the unshaded.

Lost credibility showing part shaded 60c as no voltage and current. That's not true. I also don't think the examples are really a true account of shading in the real world. I was wondering about the spilt panels. I did notice that you didn't do any string examples. Because that 10a to 5 in a. String is a pull down.

Is this course available ?

I have a defective half cell 360W panel. First 1/3 of the left side in portait will melt snow faster and that particular panel output voltage is 2/3 of rated open circuit. There are 2 series of 8 identical panels with no partial shading. The power loss (120W from that panel + 120w from the unbalanced string) is not that concerning. Is it the first bypass diode being shorted?

You've earned a new subscription ! Great video 👍

Gday folks, Can you tell me if Half-cut modules are ok to fit into an off-grid array. I am considering upgrading my old 185w panels with 390w panels.

Great video 👍🏼

In properly orienting half-cut panels, does it matter which end is up in a portrait orientation? Or does proper orientation only mean portrait vs landscape -- and which end is up doesn't matter? I noticed that with my panels (all in portrait orientation), some have the serial number sticker at the top, and others at the bottom -- arbitrarily. (Some of my panels have the top half in shadow for a period of time, so want to make sure they're oriented properly.)

The half shaded single panel in a serial string will halve the current through the shaded bypass diodes but it will not increase the serial string voltage significantly. However, if it was two split panels in parallel, then the split panel shading would reduce losses significantly over a conventional panel.

Liedar and truthdar, nice!

Great no nonsense video! You guys should make more such videos. Thanks a lot.

Good info 👍 Buying a half cut is not enough... Orientation of panel also matters when it's installed in site prone to shading... Something new for me..😊

Great video! I learned a lot.

This is basically the only video (or article) I've found online that wasn't a bunch of half truths and misconceptions regarding solar panel shading, but actual practical data applicable to the real world.... Thank you.

Thank you! Very clear and logic explanations with good examples.

The 120 half cut solar module that you are showing does not have 120 cells. If you count, you'll notice.

Omg. This is one of the best solar vids out there!! Thanks a ton for doing it!!