How to test and replace diodes in solar modules

  Рет қаралды 50,730

EnergyUME

EnergyUME

Күн бұрын

Learn how to evaluate and replace the internal bypass diodes within the junction box of a solar module.
⏱️Timestamps:
0:07 Intro
0:54 Shading impacts
1:25 Diode purpose
3:04 Safety precautions
3:36 Panel specifications
4:46 Locating the diodes
5:28 Measuring voltage
6:14 Measuring current
7:12 Diode continuity
9:22 Replacing diodes
10:25 Other videos and resources
🗎 Working on Solar Panels and Power Output (FS-2022-0646)
extension.umd.edu/resource/wo...
🌐For additional information, visit:
go.umd.edu/FarmSolar

Пікірлер: 25
@andremaier5816
@andremaier5816 16 сағат бұрын
i hope you read the comments here as i have some disturbing info for you..The first ad to pop up from utube on your vid here was about a dual belt drive generator scam and the guy in it stresses not to buy solar.Your vid was educational and just what i needed to sort out a problem.The scam ad should be reorted but it wont let me on my end.
@davidoflight1313
@davidoflight1313 10 ай бұрын
Drew, Thank you for actually showing the technique you used to open the JBox; this crucial step is omitted in many solar module stories. 🥇
@rhumb
@rhumb 8 күн бұрын
Merci à vous pour ce tutoriel très explicatif...
@Ben-ww1zq
@Ben-ww1zq 2 ай бұрын
So I have 25-year-old solar panels and they don't have diodes so I think you've just cleared me in to why my system continues to test low, plus I was testing on DC which I thought was accurate and getting a low reading so thank you for pointing that information out I love how in-depth you are
@CharlieArehart1
@CharlieArehart1 Жыл бұрын
Thanks so much, Drew. The first couple of minutes were really valuable, as that info on the negative impact of panel shading was not something I'd seen presented in any other videos (and I've seen many). That said, the rest of the video did veer more into EE-land, reminding me why I switched out of that degree to IT instead! :-) But hey, for those who have the knowledge of electronics or are prepared to obtain it, it seemed to be great info. And go Terps!
@solargoat
@solargoat Жыл бұрын
Love the video… trying to figure this out and glad to see others have done this all before.
@perfectcs9759
@perfectcs9759 2 ай бұрын
Thank you for this is what I need, just tested my 50w panel today as you explained it showing me 2.3A on the sun seems to me ok
@cronosh2o
@cronosh2o Жыл бұрын
Great video, Thanks!
@ImASurvivorNThriver
@ImASurvivorNThriver 6 ай бұрын
Good stuff ‼️ Thanks for sharing.
@sienervanrensburg6644
@sienervanrensburg6644 Жыл бұрын
Great video, thank you very much
@MrBruce0777
@MrBruce0777 Жыл бұрын
Very well described
@shamanking5195
@shamanking5195 10 ай бұрын
Hi I think the connections can get very hot what kind of soldering wire is recommended ???
@sairym3607
@sairym3607 Жыл бұрын
My brand new 130w flexi solar panel shows zero amps and zero volts output, if i can access the panel connection box, when the panel has been in full sun, will i get a shock?
@thesurvivalist.
@thesurvivalist. Жыл бұрын
I have 8 solar panels with 3 diodes each, that are burned out. The junction boxes have been melted.
@douglasheld
@douglasheld 4 ай бұрын
8:11 The probes are in exactly the same position as in 7:36. I don't understand this.
@kingerz
@kingerz Жыл бұрын
As clear as mud.
@maxpower9340
@maxpower9340 Жыл бұрын
Brillant, but my panels are generating 36V which is correct but only 0.4amp. This is on both when tested separately. What could be wrong? They both worked a month ago - cheers
@winovmc
@winovmc Жыл бұрын
They are failing under load. Could be the diodes in the junction box on the back of the module. If they are good, the cells could be bad. Do you have lines on any of the cells that resemble snail trails? If so, get new mods.
@L3X369
@L3X369 Жыл бұрын
why not use a small diode between every cell?
@ekstrapolatoraproksymujacy412
@ekstrapolatoraproksymujacy412 Жыл бұрын
You need the same size diodes in that case because it still have to be capable of dissipating the same amount of power because the same current will flow through it no matter how many cells it bypasses (cells are in series, ther is just "one" current flowing thrugh all off them). Big diode for each cell would be very expensive not just because of the cost of the diodes, but maybe more because of the complicated construction of such panel, if something cost 50% more but doesn't result in at least 50% more performance (more annual energy generation or better longevity) it shouldn't be there.
@e9999qwe
@e9999qwe 10 ай бұрын
Wow! Messed up! He connected the probes the same way in both cases (red on LHS, black on RHS) at 7:33 and 8:07 and the connection to the meter appears to be the same (bit of red showing on the POS side) in both cases and yet he got 2 ostensibly different results on the meter in the video. How is that possible you ask? Well, it isn't. So, what gives? Well, if you go frame by frame at 7:33 you'll see that the images have been changed at some point. On one frame the meter starts to show a reading then the frames are changed (and no longer moving, tellingly) and it now shows OL. Basically, it appears he messed up and did not actually swap the probes as he should have done, or lost the footage, and they then manipulated the video to show the "correct'" answer by inserting a still image. Odd...
@fightintheshade
@fightintheshade Жыл бұрын
Did i miss something? You replaced two diodes with one diode?
@roelsteenbergen-seuterschipper
@roelsteenbergen-seuterschipper Жыл бұрын
First he showed the junction box with 2 diodes with screws and then he showed another junctionbox with one diode, which was soldered
@laryangel4082
@laryangel4082 Жыл бұрын
R
@tittiger
@tittiger 7 ай бұрын
USELESS information without some links on how to procure proper replacement diodes for my sized panel! Why bother when you only go half way? I suspect when I need to replace them that they Internet will have been taken down also. So no new info and no ordering of diodes when you really need them.
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