Solar Panel Basics - Why your solar power is low
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- čas přidán 6. 09. 2024
- Showing how solar panels are constructed, and why you don't always get the power you expect. See the difference in power output when Amporhous or Monocrystalline panels are shaded.
Favorite Amporhous panels and kits
Solperk - amzn.to/3h6G0Y4
Sunforce kit - amzn.to/2GJvIkf
Powerfilm - amzn.to/35h0A5F
Favorite Monocrystalline and Polycrystalline panels
Grape Solar - amzn.to/3k5NqwL
Rich Solar - amzn.to/2FiDcdj
Renogy - amzn.to/3bDX8Dr
MXX Foldable - amzn.to/2ZklAEQ
Watt Meter - amzn.to/3k2buR1
MPPT Charge controllers
Rich Solar - amzn.to/3bJ2H3p
Renogy - amzn.to/3bCpQ7N
Meters Used
Klein MM5000 - amzn.to/333TBKA
Fluke 175 - amzn.to/35kIIHo
Kaiweets HT118 - amzn.to/3mby1Nl
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Really nice video Sir, showing the why and explaining it!
thank you sir.. your video might have saved me
very nice explanation. thanks
what if I have an old poly solar panel with 33 cells, and there are two in parallel, so I am measuring 18v Ovc and 5,6 Amp Isc, I do not have the panel data, but my problem is that when I connect the two solar panels to the PWM regulator, there is no current flowing, nothing, and all connections where redone. Also I changed all Schottky diodes (4). Any Idea?
Question please. I just added a Renogy 50amp DC-DC MPPT charger and have one 200w solar panel. After finding issues with how the mc4 wires were crimped at the factory and fixing these, I have approx 8 to 10amps coming from the panel, directly out of the 15a fuse at the panel, as well as the + and - wires at the MPPT charger. Even connected to the charger, I still have about the same amount of amps; but my monitoring system is showing very low amps, like 1.75 amps and the two 100ah lithium batteries are not charging. Any ideas what could be going on? This is a new set up and has never worked properly. I've confirmed no shade on any part of the panel, confirmed the connectors are good and get solid reads from my meter. All parts are Renogy - panel, batteries, mppt... TIA
Sir my solar panel has GOOD. Voltage but low amperes 15milliamps thanks for reply
Can you run grow lights from such a solar setup and if so how many (what number of pannels would you need)
Hello.
I am facing with a situation, where one panel is outputting half of the voltage of another one, in same enviroment conditions.
They are both tested out of circuit.
I cannot think, but it is a bad panel.
Thanks solved my problem!
Thats fascinating. They dont tell you these things.
Hi, Thanks for the great video. Question - I'm running two panels in series - 120 watts and 130 watts. I'm getting the voltage ok and the panels are not shaded on a sunny day but I'm only getting around 2/3 watts showing on my charge controller. I've tested both seperately and they both show low wattage, any idea's?
What type of charge controller are you using? PWM or MPPT?
The most common mistake I see in solar is people using PWM controllers, and not realizing those controllers will waste 30% of their solar energy.
Hey gang, I just throat punched myself after solving my problem, because I mocked up the system and kept that card board on the corners for both panels, was making 0.29A, then I removed the card board, boom 12.8 amps from 2x 100W panels in series
thank you for the video but don't solar panels come with built in diodes to prevent just one cell from taking out the entire panel
Some panels contain a bypass diode to skip the whole panel if cells are blocked, so other panels in the string still work. For example, if you had 4 panels in series, and none of them had blocking diodes, a few cells being blocked on one panel would take out all 4. But, if all the panels had bypass diodes, only that one panel would be bypassed, and the other 3 would work.
But, not ALL panels have those bypass diodes. Some have none, others may have 1 to bypass the whole panel, others may have 2, to bypass the half of the panel if that is blocked. I have never seen a panel with a bypass diode on each cell.
@@MultiMeterChannel correct thank you I think even the cheap 100 watt panels have multiple diodes these days so that one cell does not take out the entire panel, fingers crossed
So the issue I'm having with my small system is that I'm not getting enough amps through it. I have a small roughly 10 watt panel, 10 watt charge controller, and it charges my small 60wh lithium battery. I'm getting roughly 19.6 volts consistently in the sun and no lower than 18.5, but I'm only getting 0.1 amps according to the controller. My cord is about 10 feet long. Should I just try a new controller?
What is the short circuit current of you solar panel, without the controller? You need to verify if the panel is putting out the right current when it is alone in the sun. If it is, then replace the controller
Ty
man, where you been?
👍👍👍
That's why diodes are used to fix this problem. I mean you forgot 90% by not telling people about the diode that are used.
I had the same thought. He never discusses the bypass diodes that are in most of the larger panels. I guess this is what you get when you try ti find good information on the information highway.
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