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How many panels ? ( to run 230 volt sprinkler pump 30 minutes a day?) - Page 15

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Posted by bealiba on July 14, 2008, 12:57 am
 

You have the formula, put in your chosen parameters.

If you like, It's closer to the truth than anything you have said

When was the last time you ever saw a panel of (Enter Number Here)
rated watts produce that rating outside of lab conditions. You name a
temperature and we can use it.

You name a temperature and we can use it.

Ah. you want to guess.

This is your best guess is it? From the standard test temp of 25C my
checking shows that at 45C:
1) there is an increase of around 1%in the short circuit current

2) A decrease of around 8.5% in the open circuit voltage

3) A decrease of around 6% in the maximum power.

Ah, no. That was your battery recommendation. If you will remember the
180 Ah was the minimum capacity required. Battery specs to be supplied
by user. You said T105s at 225Ah. Feel free to change this if you
like.

Is this the database that contains T105s and L16s as the worlds supply
of batteries.

You have the formula, go for it


Posted by Ron Rosenfeld on July 14, 2008, 8:46 pm
 
On Sun, 13 Jul 2008 17:57:39 -0700 (PDT), bealiba@gmail.com wrote:


Well, I gave you a serious opportunity to supply some clarification to your
incomplete specifications, so as to run a real-world simulation, and you
clearly are unable to do that.

I'd call that pretty sad for someone who purports to be a solar power
consultant.
--ron

Posted by Ron Rosenfeld on July 15, 2008, 1:56 pm
 On Sun, 13 Jul 2008 17:57:39 -0700 (PDT), bealiba@gmail.com wrote:


This post clearly demonstrates that George doesn't know what NOCT is, even
though he uses it in his useless spreadsheet.  He also doesn't know how to
measure or estimate it, nor does he realize the consequences of making
measurements at a test temperature of 25C vs measurements at a NOCT of
45C.
--ron

Posted by bealiba on July 15, 2008, 11:04 pm
 
3) NOCT Normal Operating Cell Temperature.  This is "C8" and is user
input from the manufacturer's data.

Posted by Ron Rosenfeld on July 16, 2008, 1:53 am
 On Tue, 15 Jul 2008 16:04:49 -0700 (PDT), bealiba@gmail.com wrote:


Unfortunately, many do not supply it.  So what will George do in that case?
--ron

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