Some California residential PV contractors say permit, fire marshal,
interconnect, and rebate paperwork adds $1/W to the retail CEC-AC price.
- Original Message -
From: "Wind-sun.com"
To: "RE-wrenches"
Sent: Friday, June 05, 2009 8:15 PM
Subject: Re: [RE-wrenches] sales to-date
For
For us, the stimulus has been - and is expected to be in the future - a big
joke. We were lucky in that we get quite a few local off-grid installs and
upgrades, because the grid tie market has dropped by over 50% in the past 6
months or so. While panel prices have dropped, it seems like almost a
Dick,
Kudos for the contributions to the magazine. I do hope as John W.
speculates that this will all be sorted out in NEC 2011.
In the meantime, while I can see the validity of your method, I don't think
it is well supported by NEC 2008. Specifally at 690.43 (which would overide
the more genera
I agree with Kelly and others that all grounding electrodes should be bonded
together. My experience in lightning country with PV systems with a ground rod
at the array and separate ground rod at the BOS and no wire connecting the
ground rods has always resulted in fried equipment. The same sys
Kelly,
I always install a grounding electrode at the array. I always run a continuous
(not spliced), properly sized, or oversize (usually #4), bare, copper conductor
from the array modules and frame, to that electrode, then continue it,
direct buried, to all of the other grounding electrodes i
IRS Guidance on Electing ITC
(Copyright 2009 Stoel Rives LLP)
On Friday, June 5, 2009, the Internal Revenue Service issued Notice 2009-52,
which provides guidance informing taxpayers how to elect to claim the
Investment Tax Credit ("ITC") under IRC § 48 in lieu of the Production Tax
Credit ("P
Kelly,
I can currently not installing the 690.47D equipment. My inspector is not
asking for it. I personnal feel 690.47D is one of a few unmitigated
disasters contained within NEC 2008. Perhaps I use too strong a term, but as
the AJH's face an increasingly contadictory Code, they will continue to
Brian,
Thanks for your thoughts. Have you changed your installations to meet
690.47D? If, so, how?
On 6/5/09 1:45 PM, "Brian Crise" wrote:
> Kelly,
> It is my understanding that all types of grounding electrodes, whether
> supplementary or not, for lightning protection or PV array grounding sha
Mark,
Yes, it's confusing. Which is why I wanted to know what the Wrenches are
actually DOING in their installations to meet 690.47D.
On 6/5/09 1:19 PM, "Mark Frye" wrote:
> Thanks Kelly,
>
> I haven't gotten the handbook, but I think I am getting the picture.
>
> How nice of the handbook to
Hey All,
Has anyone heard of any NABCEP approved seminars being offered
between the Small Wind Conference and the MREA fair in Wisconsin this
month ? Thursday June 18 is an open day that would be good for some
of us to get in a full day seminar. I need some CEU's for my upcoming
NABCEP r
Kelly,
It is my understanding that all types of grounding electrodes, whether
supplementary or not, for lightning protection or PV array grounding
shall be bonded together to form the grounding electrode system.
(250.106, 690.47(A) which sends you to 250.50, NFPA 780-2008 4.14).
If you
Thanks Kelly,
I haven't gotten the handbook, but I think I am getting the picture.
How nice of the handbook to let us know that the new GE and GEC that "shall
be installed" according to 690.47D is nothing more than an "optional
supplementary ground electrode". And furher, if you do choose to ta
This dialogue provides a barometer that helps business owners measure
performance and make plans. Still, I am copying it over to RE-Markets.
Industry consultants predict generally lower sales in 2009. See
http://www.greentechmedia.com/articles/read/u.s.-solar-market-so-promising-except-for-2009
Mark,
I don't think that the 690.47D "PV GE" is part of the premises AC & DC
ground electrode system.
IMO, in order to function to properly as ³enhanced protection from lightning
induced surges² as described in the 690.47(D) section note in the 2008 NEC
Handbook, the ³optional supplementary groun
Kelly,
The question is, if the AJH had required you to run the new array DC GED
directly to an additional DC array GE, would that new DC GE system need to
be bonded with the exisitng AC GE system with a bonding wire other than the
new EGC running from the array to new DC GE?
Unfortunately, NEC 20
Rick,
I don't see that applying to Kelly's question.
He said that the AHJ is not requiring the separate array grounding in his
case. The discussion has to do with the number and sizing of conductors run
in various parts of the system in order to accomplish various "grounding"
requirements.
Mar
Kelly,
If I read you right you are talking about two different things. The EGC
running with the PV DC circuit conductors are just that, EGC's and are
sized to the largest PV DC conductor. Applying 690.47D to these conductors
is incorrect.
There is a conductor running from the inverters to the m
Wrenches,
Aside from the fact that Chinese solar cells are being assembled all over
the world into modules with varying degrees of quality, what specific
Chinese brand solar modules do you use based on them meeting their stated
physical and electrical specifications, construction, durability, b
Dick,
Thanks for your take on this.
The problem I see with using the existing AC/DC system GE for the PV GE is
that the EGC will run in parallel with it, separate, but connected at each
end (at the array and at the GE). This could set up a ground loop and still
leaves the electronic imperiled.
I
Hi Drake,
Up to now, like you, we've been using the SMA DATA SHEETS
(the glitzy ones with the color graphics) to size our wiring and
breakers. But, those sheets make no mention of a
MAXIMUM OUTPUT FAULT CURRENT.
MAXIMUM OUTPUT FAULT CURRENT is specified only in the very last pages
of the inst
Hi Dick,
Thanks for the suggestion. I will run the concept by the SMA tech
people. I did use the SMA spec sheets in sizing the wiring, but
maybe opening the relays creates fault current at a voltage that will
jump the gap.
Drake
At 10:50 PM 6/4/2009, you wrote:
Hi Drake,
I'm sending you
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