Ebay solar

Hi,

Anyone been checking the solar panels on ebay, they are cheaper and appear to be similar specs to known brands. Anyone with a background in this area willing to give some comments?

Thanks
Back Expand Un-Read 0 Moderator

Reply By: Member - Graham H (QLD) - Wednesday, Jun 03, 2009 at 21:02

Wednesday, Jun 03, 2009 at 21:02
Its the efficiency rating that matters.

Its also very easy to cut and paste specs from someone elses website and put it in your listing as itss tooooooo late when you get it home and it doesnt do what it should.

Check their feedback Ask them a question as to where you can see the article on a makers website.

Above all be very careful.

Post the sellers name as I haunt there a fair bit.
AnswerID: 368302

Follow Up By: Austravel - Thursday, Jun 04, 2009 at 09:46

Thursday, Jun 04, 2009 at 09:46
Hi Graham,

Here are the panel specs.

# Technical Data
# Nominal Power 80w
# Nominal maxium output voltage 17.6v
# Nominal maxium output current 5.01amp
# Open circuit Voltage 21.8v
# Short circuit current 5.83amp
# Diamentions (tolerance +4/-1mm) 1210 x 540
# Thickness (tolerance +1/-1mm) 28mm
# Weight 19kgs
# Packing 2pcs/ctn
# Size 125 x 11.7 x 62.5cm
# Type of Solar cells Monocrystalline 125mm x 125mm
# Connection box with bypass diodes 90cm leading cable
# Temperature
# Power -0.47% c
# Open circuit voltage -0.38% c
# Short circuit current +0.10% c
# Limits
# Max System voltage 1000Voc
# Opening module Temp -40 ...... +90 c
# Max Load 5400N/M2
# Tolearance +5% - 5%
0
FollowupID: 635917

Follow Up By: Maîneÿ . . .- Thursday, Jun 04, 2009 at 10:16

Thursday, Jun 04, 2009 at 10:16
The main thing to look for is the MANUFACTURER'S name !!!

After all the manufacturer nominates the warranty and conditions, not the supplier.


I notice the "Nominal maxium output current 5.01 amp" is rated much higher than a 'BP 80 watt' panel which from memory is only ~4.8 Amps by comparison, the person who buys on untested (technical) information would say it must be a much better Solar panel than the BP panel ??

Maîneÿ . . .
0
FollowupID: 635921

Follow Up By: Member -Signman - Thursday, Jun 04, 2009 at 12:31

Thursday, Jun 04, 2009 at 12:31
Mainey
Less than 5% is bugga all for a comparison.
A light cloud cover would give a bigger difference than that !!

0
FollowupID: 635932

Follow Up By: Maîneÿ . . .- Thursday, Jun 04, 2009 at 13:17

Thursday, Jun 04, 2009 at 13:17
Yes, I agree with what you have posted !!!

However, the information states the 'unknown' panel is rated even higher than a BP Solar panel.
This indicates the 'unknown' panel is superior to a BP panel - doesn't it ?

As to "light cloud cover" I can't agree with you here, "light cloud cover" will very often, if not most often, INCREASE the Amps available not decrease Amps, with the better quality Solar panels that opperate very well in low light conditions.

Maîneÿ . . .
0
FollowupID: 635938

Follow Up By: Austravel - Thursday, Jun 04, 2009 at 22:39

Thursday, Jun 04, 2009 at 22:39
Best I can make out is the manufacturer might be KLT. Have done a bit of searching but can't come up with a manufacturer's site only reference to them.
0
FollowupID: 636038

Reply By: Member - DW (NSW) - Wednesday, Jun 03, 2009 at 21:20

Wednesday, Jun 03, 2009 at 21:20
I would go with the BP Solar panels. After having a 56 panel array on a farm Remote Area Power Supply, these are very much the same. Not sure about the others though. Ensure you have a regulator connected too otherwise the batteries will boil dry quite quickly.
Good luck.
AnswerID: 368304

Reply By: Maîneÿ . . .- Wednesday, Jun 03, 2009 at 21:36

Wednesday, Jun 03, 2009 at 21:36
Solar panels have their rating stated as ?? Watts (64 Watts and 80 Watts being some popular numbers) as these are the easy to ascertain number because they are the absolute 'maximum' watts attainable.

However the *most* important number is the number of Watts the panel delivers in 'low light' (cloudy, early morning or late afternoon) which is really never mentioned simply because it can't be replicated *exactly* on a regular or continuous basis to give one number like the maximum number of Watts.

My Sharp polycrystalline panel starts working in much lower light than my multycrystalline BP panel does !!
(yes technically they are both multycrystalline panels)

Maîneÿ . . .
AnswerID: 368312

Reply By: Mandrake - Thursday, Jun 04, 2009 at 11:31

Thursday, Jun 04, 2009 at 11:31
I will be as careful as possible here for fear of getting "moderated" for advertising ..

So here goes -

I buy my Mono Panels 80w and 140w from Rich Solar in China - the specs are
on my mini website for all to see and I have brochures available if requested .

Before releasing a panel I test it for output both Volts and Amps and so far
the spec sheets are spot on - This info is then stuck to a label on the panel .

Not foolproof I know but at least I know the panel was good when it left my care.....

It seems a lot of people are now buying panels from China and selling then
through ebay etc...

If anyone wishes to check the specs here is the website - Please do not look at the pricing as that will cause me to be moderated.... LOL

www.solarsteve1950.com

Rgds

(I'm really not promoting or advertising !!)

Mandrake
AnswerID: 368369

Follow Up By: ExplorOz - David & Michelle - Saturday, Jun 06, 2009 at 16:09

Saturday, Jun 06, 2009 at 16:09
Mandrake you have the choice to not respond to posts where you have a conflict of interest so if you don't want to be moderated please don't promote your business interests. If however you become a Business Member you are more than welcome to respond in the manner in which you have done in this and in other posts.
David (DM) & Michelle (MM)
---------------------------------
Always working not enough travelling!

Lifetime Member
My Profile  My Blog  My Position  Send Message
Moderator

0
FollowupID: 636229

Follow Up By: Mandrake - Saturday, Jun 06, 2009 at 20:47

Saturday, Jun 06, 2009 at 20:47
Cheers David and Michelle - I shall from henceforth be silent in regards to all things Solar Powered .. I cannot afford the Business Membership and am not sure if the benefit outweighs the cost anyway - A silent member I shall be ..

Rgds

Mandrake aka Steve ..
0
FollowupID: 636271

Reply By: Maîneÿ . . .- Thursday, Jun 04, 2009 at 13:24

Thursday, Jun 04, 2009 at 13:24
Maybe we need a test session organised for different brands / types of Solar panels :-)

Have 3 or 4 panels laying flat, all tested simultaneously in *ALL* light conditions
not just for maximum Amps available.

Maîneÿ . . .
AnswerID: 368378

Follow Up By: Rolly - Thursday, Jun 04, 2009 at 17:00

Thursday, Jun 04, 2009 at 17:00
Include a few dobs of pelican poop smeared across them or a couple of 10cm x 10cm pieces of card to see how well they go in partial shade.
0
FollowupID: 635964

Follow Up By: Maîneÿ . . .- Thursday, Jun 04, 2009 at 17:28

Thursday, Jun 04, 2009 at 17:28
Is difficult to obtain fresh poop, so should be a simple test of "low light" performance, not 'nil' light performance, because we all know (don't we) Solar panels won't work when not exposed to the sun.

Maîneÿ . . .
0
FollowupID: 635969

Follow Up By: Rolly - Saturday, Jun 06, 2009 at 15:42

Saturday, Jun 06, 2009 at 15:42
Reed wot i rit.

A *couple* of small pieces of card, or a *few* dobs of excrement.

To simulate the effects of partial shading that completely interrupts the current from some panels.

We all know about that problem, don't we ???

0
FollowupID: 636228

Follow Up By: Maîneÿ . . .- Saturday, Jun 06, 2009 at 18:02

Saturday, Jun 06, 2009 at 18:02
Rolly,
that's why I made the point of stating:
"Have 3 or 4 panels laying flat, all tested simultaneously in *ALL* light conditions not just for maximum Amps available"

I don't see any real or even perceived benefit in testing a Solar panel under conditions where we are already aware there will be no realistic current delivered by some elcheapo panels.

After all, I did post the test is for the amount of current produced in "low light conditions" being early morning and late afternoon (not the peak Solar performance times)

Maybe a shade test could also be organized at the same time, using a tree to give realistic results that could truly be expected when camping, as I'm sure some would be pretty 'upset' if they found "a *couple* of small pieces of card" sitting on the surface of there Solar panel in the middle of nowhere, that would be unrealistic.

Yes, obviously some may know the problem of 'shading' more than others !!

Maîneÿ . . .
0
FollowupID: 636244

Sponsored Links

Popular Products (14)