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Electronics => Renewable Energy => Topic started by: Simon on July 06, 2018, 11:11:49 pm

Title: dodgy solar panels?
Post by: Simon on July 06, 2018, 11:11:49 pm
I bought 6 of these panels here: https://www.ebay.co.uk/itm/142829791758 (https://www.ebay.co.uk/itm/142829791758)

Yes they have clearly been hanging around but I am a bit concerned about the markings inside the panels that looks like moisture to me corroding the collector wires.

Should i exert the powers of PayPal and my credit card company on this seller ?
Title: Re: dodgy solar panels?
Post by: ahbushnell on July 07, 2018, 06:30:04 am
I bought 6 of these panels here: https://www.ebay.co.uk/itm/142829791758 (https://www.ebay.co.uk/itm/142829791758)



Should i exert the powers of PayPal and my credit card company on this seller ?
Good luck!
Title: Re: dodgy solar panels?
Post by: Simon on July 07, 2018, 07:07:01 am
Are the panels any good ?
Title: Re: dodgy solar panels?
Post by: Simon on July 07, 2018, 07:14:29 pm
Well I messaged him and got a very fast response saying that he does indeed have a pile of rejects and a pile of good ones (2 of 6 are indeed good) and the person he left in charge of shipping picked the wrong ones and he will send replacements. So hopefully all will be well and i may even end up with 4 spares a couple of which are not so bad but I'd not trust to put them in a string of 14 and have one panel fail the lot.
Title: Re: dodgy solar panels?
Post by: IanMacdonald on July 08, 2018, 08:14:58 am
If they were described as New then this is unacceptable. All depends on the description.
Title: Re: dodgy solar panels?
Post by: Seekonk on July 08, 2018, 08:33:07 am
I had two bad panels where a section in each got week.  Test the voltage across the bypass diodes.  Each panel still has a good section and I used the two good sections in series to make the equivalent of one good 12V panel.  Alas, two years later those other sections had failed too.
Title: Re: dodgy solar panels?
Post by: blueskull on July 08, 2018, 10:13:37 am
Looks like shit to me.
Title: Re: dodgy solar panels?
Post by: Simon on July 08, 2018, 06:25:41 pm
Well that is under the epoxy and the wires appear corroded. I don't know if it is unmixed compound that is acidic unless mixed.
Title: Re: dodgy solar panels?
Post by: station240 on July 09, 2018, 06:14:24 am
The solar installers online have been calling these "snail trails".
Believed to be caused by microcracks in the cells during install, eg from people walking on the panels.
Title: Re: dodgy solar panels?
Post by: Simon on July 09, 2018, 06:24:33 am
So why the colour and apparent corrosion? it does not look cracked, just like there is something wrong with the potting.