We've worked with a local distributor and have been able to design the "kits"
ourselves with all the familiar components we've found most trustworthy over
the years. If we need anything specific for any particular installation, a
phone call changes that particular "kit" It's work well...
Max
Joel,
We use pre-packaged systems when working with out of state electricians. We
have used SunWize kits in these cases and have been happy with them. Good
engineering design, solid components and good documentation/manual.
For our own local installs we find that working with individual compone
Matt, Right-on. I meant solid smaller gauge wire and multi-stranded larger
gauge wire as compared to finely-stranded wire.
Dave, Almost every electrician has nipped off a strand or more to get a
conductor to fit into undersized connectors. Older model charge controllers and
inverters were notor
When we do ampacity calculations, we always use Table 310.16 in Section
310.15 for wire in raceway (EMT, PVC, FMC, LNFC, LMFC), and MC cable. Of
course we use Table 310.15(B)(2)(a) in a raceway or cable with more than
three conductors.
A colleague asked me about the applicability of table B.310.1.
Joel,
Changing any wires connected to a SW to solid core would be virtually
impossible because of the almost impossible to connect with stranded
wire connection blocks. Remember how ^$*! tight the spaces are in those
babies? Living with a marginally relevant inefficiency from stranded
seems a
Allan,
I remember you speaking at that Xantrex event. As I recall, you were a
Charter member?
And I bet Pagan remembers me grilling her at one of the picnic tables
in the hot sun for about an hour. I was trying to determine what my
$300 and
a 4 hour test was going to do for me! Not much..
Hello Ezra,
This is not good news. I have a lot of customers with 10 year old SW4048 and
SW4024 inverters. What is the most reliable and simplest swap-out?
Joel Davidson
- Original Message -
From: Ezra Auerbach
To: RE-wrenches
Sent: Wednesday, August 05, 2009 5:48 AM
Subject
> are we talking about 2% voltage drop, resistance, or power loss?
No- I was talking about the 2% difference in resistance between two
wires, which is not the same thing as 2% voltage drop. What I got from
this discussion was that solid copper wire will help your voltage drop
by about 0.05%, a
Dave, I agree. but are we talking about 2% voltage drop, resistance, or
power loss?
What I got from this discussion about solid vs. stranded wire (1) use solid
copper wire and (2) keep I2R losses low and (3) if you use stranded wire, be
very diligent when tightening connectors. Anything else?
Called again at 11:29 AM PDT, muzak for 5 min and rolled over to voicemail.
_
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Peter
Parrish
Sent: Wednesday, August 05, 2009 9:15 AM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches]
Jeff,
Around 2001 Trace/Xantrex set up its Certified Dealer Program (it happened
while Xantrex was taking over Trace). It was a good attempt, long before
NABCEP, to set up a way for better installers to set themselves apart and
market accordingly. Pagan MacKay set it up under Ezra Auerbach's initi
Hi Ezra,
How did it work in stand by mode?
I couldn't get one to work with 250 watts of 4' tubes, even at the
lowest search setting.
I tried tech, but they only offered a link to old Trace "hard to use"
items.
jay
peltz power
On Aug 5, 2009, at 5:48 AM, Ezra Auerbach wrote:
Hi Folks,
I
Joel, we've been working with a local Dist (so cal) and have been getting
packaged systems in the 2-10 Kw range. Contact me off list.
Max
760-403-6810
- Original Message
From: Joel Davidson
To: RE-wrenches
Sent: Tuesday, August 4, 2009 8:42:33 PM
Subject: [RE-wrenches] Packaged On
Hello wrenches,
I'm getting tired of shopping for parts and want to spend less time talking
to vendors and more time with customers. Some manufacturers and distributors
offer packaged on-grid residential PV systems that include modules, mount,
inverter, etc. I know some wrenches are don't like
Hi Folks,
I had an XW on my off grid system for a number of months, at the
insistence of my partner it has been taken out and our old SW Plus is
back doing homestead power duty. The reason we took the XW out of
service was because it had an unreasonably high tare loss and it
didn't work w
Just to drive a stake in the ground.I was on hold for 18 minutes this
morning (9:01 AM to 9:19 AM before someone picked up). - Peter
Peter T. Parrish, Ph.D., President
California Solar Engineering, Inc.
820 Cynthia Ave., Los Angeles, CA 90065
CA Lic. 854779, NABCEP Cert. 031806-26
peter.parr..
Jeff:
The plug was included in a bag of screws, cover plates, bushings etc. I
suggest that rather than manufacturer's be burdened with providing each
individual part, they offer a replacement bag of parts as included in the
original shipment. Mark Edmunds is out of town, but I hope for a rep
Friends:
While not perfect, my experience with Xantrex technical support has been
pretty good. The phone is answered within 4 or 5 minutes and I get
somewhat differing but reasonable answers.
William Miller
Please note new e-mail address and domain:
William Miller
Miller Solar
Voice :805-
We, too, do about 5 XW AC coupled systems per year and they can definitely
be issue prone. The latest issue that we have is a system with 2 Sunpower
3300x (positively grounded GT3.3's) inverters and an XW6048. The system
operates as expected when the grid is present but when the grid goes down
cr
hi all
In minnesota we get about 1400 Wh/Wp/yr (no losses) , if a system is designed
for 3% voltage drop loss, this is 42 Wh/yr/Wp or 1050 Wh/Wp for 25 yrs. if the
wire is solid instead of stranded this saves 1Wh/yr/Wp or about 25 Wh/Wp for 25
years. In terms of money if the customer is payin
Thanks to all. William Miller had a spare plug left over from another job and is sending it to me so for now I am back on track.
However, this still does not resolve my initial question and comments from several others on the list. Over the years when installing and later servicing different br
Hi Peter,
The Outback inverter will not regulate battery charge while AC
coupled. The SMA is the only system designed to give a regulated
charge to batteries in the AC coupled mode. The Outback axillary
relay can be used to drive a relay that will disconnect the input to
the inverter, to reg
Thanks DAve yes I meant 2% more for stranded than the voltage drop for solid.
So the number is very small. Your example was right on.
Darryl
--- On Wed, 8/5/09, Dave Click wrote:
> From: Dave Click
> Subject: Re: [RE-wrenches] solid vs stranded AC vs DC
> To: "RE-wrenches"
> Date: Wednesd
2% loss is significant, but I think that Darryl was saying that the
resistance for stranded wire was 2% higher than solid. So if you had a
3% voltage drop in your system with stranded wire, you could rewire the
system with solid wire and have a voltage drop of (3% x 0.98) 2.94% at
peak producti
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