Reply
 
Thread Tools Display Modes
 
Old 08-20-2011, 12:11 AM   #1
Senior Member
 
jage's Avatar
 
Join Date: Apr 2007
Location: Franktown, CO
Posts: 7,601
Shade, Shadow and Junk on a Kyocera 185w panel

The following is mostly raw footage of my amperage fluctuation as I covered or shaded the panel with various "experimental test objects" to see what would happen. Interesting that you can halve the output with a small piece of cardboard, or zero it by covering less than half the panel. This is all done in full sun, and orientation does seem to matter- although my testing was largely random.

[youtube:vy4l2mjn]
__________________

__________________
and then
everything changed
jage is offline   Reply With Quote
Old 08-20-2011, 12:58 AM   #2
Senior Member
 
cellularSTEVE's Avatar
 
Join Date: Oct 2007
Location: SoCal
Posts: 1,069
Re: Shade, Shadow and Junk on a Kyocera 185w panel

I am surprised how it drops so much with such a small coverage (i.e. cardboard).

Roof rack shadow isn't as bad as I suspected but a rooftop box will likely make it zero, as shown in the half blanket example.

Thanks for posting this!

steve
__________________

__________________
'05 Ford V-10 4x4 SMB "50" White
'00 Jeep Cherokee 4x4 Highly Modified
'04 Jeep Grand Cherokee- wife won't let me modify it. :-(
Does anyone really read this stuff other than surfgeek?
cellularSTEVE is offline   Reply With Quote
Old 08-20-2011, 05:50 AM   #3
Senior Member
 
Pntyrmvr's Avatar
 
Join Date: Jul 2011
Location: GTA, Ontario
Posts: 927
Re: Shade, Shadow and Junk on a Kyocera 185w panel

Jage;

Outstanding experiment. That black tee shirt must have been making 20 amps or volts or whatever!

How much did that panel cost you? Almost 10 amps with no moving parts sure keeps the fridge running.

Regards,

Gavin
__________________
"Talk is cheap. Whiskey costs money."
Pntyrmvr is offline   Reply With Quote
Old 08-20-2011, 07:01 AM   #4
Senior Member
 
cygvan's Avatar
 
Join Date: Oct 2010
Location: Bergen County, NJ
Posts: 219
Re: Shade, Shadow and Junk on a Kyocera 185w panel

does your panel have bypass diodes? if not, i wonder what youd get with them.
__________________
Red Zeppelin - 2003 Chevy Express 2500 6.0L 2WD RB
cygvan is offline   Reply With Quote
Old 08-20-2011, 08:41 AM   #5
Member
 
Join Date: Nov 2009
Posts: 39
Re: Shade, Shadow and Junk on a Kyocera 185w panel

Great experiment. I now have a better understanding of the effects of bird poop on my panels. I need to get up there today!! DocD
docd is offline   Reply With Quote
Old 08-20-2011, 08:57 AM   #6
Senior Member
 
twogone's Avatar
 
Join Date: Aug 2010
Location: Taylor, Mississippi
Posts: 1,648
Re: Shade, Shadow and Junk on a Kyocera 185w panel

Dang! Ida lost some bets on those tests. Apparently the entire interaction of the panel is required to get voltage. My 15 year old panel really falls off sharply when a little cloud coverage happens. I wouldn't have bet 8" square of cardboard was so severe. Thanks a bunch for some real world understanding of the panels
__________________
'95 SMB E350 Quigley 7.3
https://www.taylorarts.com
... If you have to ask, you'll never understand...
"... torpedo'd, because we don't generally cotton to bullshit around here." -jage
"... do they ooch apart in the night?" -Dia
twogone is offline   Reply With Quote
Old 08-20-2011, 09:33 AM   #7
Site Team
 
Ford_6L_E350's Avatar
 
Join Date: May 2007
Location: Washington - Ridgefield
Posts: 4,725
Re: Shade, Shadow and Junk on a Kyocera 185w panel

Shade seems to have less effect than I would have thought. While blocking one cell has a much bigger effect than I would have imagined.

Nice demo. Thanks Jage!

Mike
__________________
SOLD04 EB350 Custom Floorplan
6.0 PSD 4.10 Posi
Salem Kroger coil spring 4wd
SMB Trailer w/AT Air Suspension
Alaska to Key West, Labrador and more
130685 miles 16.65 mpg average

Prostate cancer survivor. viewtopic.php?f=8&t=11099
2015 VW GTI
Leaving CA for WA
Ford_6L_E350 is offline   Reply With Quote
Old 08-20-2011, 09:36 AM   #8
Site Team
 
WVvan's Avatar
 
Join Date: Jul 2009
Posts: 1,293
Re: Shade, Shadow and Junk on a Kyocera 185w panel

Excellent! I love a good experiment. I was really surprised how much of a difference the plastic pipe made if it was laying directly on the panel as opposed to being just above.
The biggest surprise was how you get no amps with a partially covered panel. I wonder if the parts of the panel that are getting no light start acting like resistors so that whatever energy that is being produced by the uncovered panels is being blocked.

I'm just guessing. Is there anyone here on the board who knows about solar cells and would like to comment?
__________________
Open the pod bay doors Hal.

Once I exit Hal, this is what I do.
https://larry.wvnet.edu/~van/pics/lic...late-small.jpg
WWW.WVBIKE.ORG
WVvan is offline   Reply With Quote
Old 08-20-2011, 09:37 AM   #9
Site Team
 
BroncoHauler's Avatar
 
Join Date: May 2007
Location: Southern New Mexico
Posts: 9,241
Re: Shade, Shadow and Junk on a Kyocera 185w panel

Well sure it was informative, but incomplete. What's the panel output when the entire solar panel is completely covered?

Great info, and yeah, surprising results.


Herb
__________________
SMB-less as of 02/04/2012. Our savings account is richer, but our adventures are poorer.
BroncoHauler is online now   Reply With Quote
Old 08-20-2011, 10:40 AM   #10
NRL
Senior Member
 
NRL's Avatar
 
Join Date: May 2007
Posts: 475
Send a message via Yahoo to NRL
Re: Shade, Shadow and Junk on a Kyocera 185w panel

Nicely Done.
I would think multi panels would have better results. For example, two panels or even four panels in parallel...
__________________

__________________
96 RB E-350 460v8 4x4 Custom RestoMod
Warn12kWinch,FFloater,LSlip,Pwtrx Locker 4.10 305x70x16 ToyoMTs,Eagle Alloys,Stove,4CF Ppane Fridge, Air CompTank,Supersprings, Bilstein Shocks,Deavers,CastIron Diff Case, Bullet Proof ReBuilt Transmission, Tubulator DeRale Trans Pan Cover, SSExhaust, KyoceraSolar, Tripplite UPS, 8D AGM, TivoHD, 24in HDLED
95 FJ80 ARB/Kaymar/Emu
2005 AMG CL65 691hp 875tq
NRL is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Sportsmobile Registry

Vandiesel II

vandiesel

MCSporty

MSD
Add your Sportsmobile
Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by Sportsmobile SIP or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 08:38 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
×