Welcome to the Solar Collector
Brainstorming and Development Page!


 

Home

Hot Air Collector

Hot Water Project 1

Hot Water & Space Heating

Solar Electric

Solar Construction 101

FAQs

Best Collectors

Simply Solar
Register Calendar Latest Topics
 
 
 


Reply
  Author   Comment  
pchiquit

Registered:
Posts: 4
Reply with quote  #1 
Hi guys:
     I've been considering Solar PV for a long time but has always been hesitant due to the amount of shade on my roof. Recently I came by the opportunity to acquire 50 panels of CIGS solar panels for $.050 per watt. I'm very tempted but If possible I would like the opinion of more experienced heads if this is going to work or not. I've heard that a-Si panels perform well under shade and I'm assuming that  CIGS panels also share that property, but I'm not a 100% sure. Any real world experience on that?
     So my question is a subjective one, but basically it is: if I can get the materials cheap, how much shade can I tolerate and still generate power?
     To help understand my shading problem I did a time lapse of the house that can be seen here (located in Durham, NC) : 

stmbtwle

Avatar / Picture

Registered:
Posts: 2,731
Reply with quote  #2 
This is one of the problems with solar.  We all love trees and the shade, BUT...

PV panels will generate in the shade, but at GREATLY reduced output.  While the panels are cheap, you still have to pay for racking, installation, and microinverters.   From your video my OPINION is that it wouldn't be worth the expense.   

Get a professional opinion/analysis.  You might also look around and see if there's a good location for a ground mount.



__________________
Solar is like the wind. It may be free, but putting it to work isn't!
Willie, Tampa Bay
pchiquit

Registered:
Posts: 4
Reply with quote  #3 

Thanks for the feedback. We already had a professional that said the payback would not work on a professionally installed one. I was hoping to lower the cost by getting these panels and doing the work myself, but it looks like I should spend my time on other projects.

 

tacman7

Registered:
Posts: 29
Reply with quote  #4 
My installation is in a clear area but the tree on the ridge have to be topped to keep from shading the array. I can get an extra hour in the afternoon from 2pm to 3pm if I keep them trimmed.

Which reminds me I haven't done that this year...SolarSetup.jpg 

Attached Images
jpeg SolarSetup.jpg (396.80 KB, 38 views)

colinmcc

Registered:
Posts: 153
Reply with quote  #5 
I'd agree with stmbtwle, with that amount of shading, the is no possibility of a return on your investment, (without a substantial cull of trees to the south of course).

.
Dieseldave

Registered:
Posts: 5
Reply with quote  #6 
If you can get 4 1/2 hrs of sun in dec and Jan you will be fine
pchiquit

Registered:
Posts: 4
Reply with quote  #7 

Thanks for the additional information. Against the odds I decided to go ahead and install 10 or 12 Jinka Solar EAgle MX panels: 

https://www.pv-tech.org/products/jinkosolars-optimized-eagle-mx-panels-replace-bypass-diodes-with-high-yield

The idea is to get a solar panel that will be able to produce even on irregular shading. I'm considering a fun project and not expecting a payback, so I'm going for a small 3kw system where I'll do all the work to see if I can stay at around US$1/kw.
Thanks again for all the feedback.

colinmcc

Registered:
Posts: 153
Reply with quote  #8 
Interesting panels.. What inverter or inverters are you going to use?
tacman7

Registered:
Posts: 29
Reply with quote  #9 
Where do you buy panels like that? I see a couple on ebay.

pchiquit

Registered:
Posts: 4
Reply with quote  #10 
@colinmcc I have not finalized that, but probably a string inverter like the SMA.
@tacman7 I thought that CivicSolar had that panel as they list on their website, but after calling them they say they don't have it in stock. So the challenge now is where to get the panels.
Thanks
Previous Topic | Next Topic
Print
Reply

Quick Navigation:

Easily create a Forum Website with Website Toolbox.

 

web statistics