swingjun...@gmail.com wrote:
Thanks to all who responded,
The article Marco references, is the one referenced in the tinyurl in
my original post. I did not find anything of significance in the
previous Solar Pro issues. Based on the responses it seems there is no
good data out there to
Ian Woofenden wrote:
This is one of my pet peeves too...
A few snippets and observations from my frequently given electrical
terms presentation:
If I asked you How far is it to Vancouver? and you answered 45
miles per hour, everyone listening would know that someone was
confused. But we
Dan Fink said:
That's a tricky situation. There are only two possibilities for what's
causing the problem; sound or electromagnetic radiation
I'm betting that it's sound. Remember how you could hear televisions
singing
away at 15 kHz ?? That still gives some people headaches.
How old is
of an
ultrasonic alarm system back when I was in my 20's 30's - now I
just hear ringing in my ears.
Ron
On 4-Feb-10, at 1:30 AM, boB Gudgel wrote:
Dan Fink said:
That's a tricky situation. There are only two possibilities
for what's causing the problem; sound or electromagnetic radiation
I'm
sound occasionally. I used to be able to hear the sound of an
ultrasonic alarm system back when I was in my 20's 30's - now I
just hear ringing in my ears.
Ron
On 4-Feb-10, at 1:30 AM, boB Gudgel wrote:
Dan Fink said:
That's a tricky situation. There are only two possibilities
ringing in my ears.
Ron
On 4-Feb-10, at 1:30 AM, boB Gudgel wrote:
Dan Fink said:
That's a tricky situation. There are only two possibilities
for what's causing the problem; sound or electromagnetic
radiation
I'm betting that it's sound. Remember how you could
hear televisions singing
away
Nick Soleil wrote:
Hi Jeff:
I have had some similar issues with the Kohler generators in
recent years, after installing hundreds of air cooled and water cooled
generators from them. I have heard that they are less reliable now,
and the company is harder to deal with now.
Recently, I
.
Thanks guys.
boB
Jason Szumlanski
Fafco Solar
Southwest Florida
Original Message
Message: 3
Date: Tue, 30 Mar 2010 12:07:28 -0700
From: boB Gudgel b...@midnitesolar.com
To: RE-wrenches re-wrenches@lists.re-wrenches.org
Subject: Re: [RE-wrenches] Kohler Generator Issues
Message-ID
of
a backup. If they wanted to, they could just use the run time meter to
decide if it is warranty or not, maybe.
Thanks again,
boB
-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of boB Gudgel
Sent
Forwarding a message from Robin Gudgel...
Robin Gudgel wrote:
The CBI QY series of DC breakers have an arc shoot that is required to
quench a DC arc. This breaker would work just fine as an AC breaker although
is not marked as such. I am not sure if the AC breakers (QL, QZ and QZD
series) have
, but it isn't there. I'm going back to my myth!
Robin Gudgel
boB Gudgel wrote:
Forwarding a message from Robin Gudgel...
Robin Gudgel wrote:
The CBI QY series of DC breakers have an arc shoot that is required to
quench a DC arc. This breaker would work just fine as an AC breaker
although
Jeff Yago wrote:
First let me say that we almost never work on failed systems,
especially when its for somebody that picked our brains on pretense of
buying a system, then they went out and bought everything on the
internet, and when nothing worked they call us!
Also, let me say that the
toddc...@finestplanet.com wrote:
Don't you think the transformer is good for isolation?
Todd
I like transformer isolation, but I suppose as long as the neutral of
the generator is
tied to ground and battery negative you'll be OK.
As far as capacitors go, there is usually plenty of
Richard L Ratico wrote:
Interesting question, Mick. It may depend on the point in the cycle when the
transformer lost power and the duration of the blip.
Dick Ratico
--- You wrote:
Before I present a suggestion, here's a question:
If by chance William is able to energize the transformer
Darryl Thayer wrote:
That is a good question, I have not an answer, but of course it should
be based on the amp hour of the battery bank, absorb charging voltage,
and of course the charging source in the case of generators.
Following Ron's advise start at C/5 for SOC less than 50% then C/10
Joel Davidson wrote:
Interesting news item, but the link does not connect to the fire
fighter report. Does someone have the correct report link?
In May 2010 the Fire Protection Research Foundation (FPRF) completed a
one-year research project addressing photovoltaic (PV) power systems.
The
Jeff Oldham wrote:
I have seen this on my last 3 MX60 controllers and it is very
frustrating and looks to be a design flaw. I can calibrate the meters
to be accurate at either the Absorb point OR the Float point but NOT
both!! Not only that but the meter calibrations tend to drift a bit in
On 8/27/2010 7:51 PM, cvso...@aol.com wrote:
Help!
Has anyone delt with RF interference between a dog control device
and GVFX3524. It seems that some frequency in the inverter (or maybe
the FlexMax 80) is cancelling the emitted signal from a dog control
device which shocks the dog when
Hello Wrenches.
Do any of you know where to find shape library files for drawing RE pix
in Microsoft Visio ??
Solar, Wind, batteries, etc...
Thanks,
boB
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List Address: RE-wrenches@lists.re-wrenches.org
On 9/5/2010 9:32 PM, William Miller wrote:
boB:
I have a set of template and stencil files on my web site at:
http://www.millersolar.com/resources/resources.html
I never progressed beyond version 4.1T because it still works for me.
You are probably using a newer version, but these files
Of *boB
Gudgel
*Sent:* Monday, September 06, 2010 12:44 AM
*To:* RE-wrenches
*Subject:* Re: [RE-wrenches] RE Visio shapes files
On 9/5/2010 9:32 PM, William Miller wrote:
boB:
I have a set of template and stencil files on my web site at:
http://www.millersolar.com/resources/resources.html
I
On 10/8/2010 6:04 PM, Matt Lafferty wrote:
Hola Wrenches,
Does anybody know off the top of their head if the
/5-minute-wait-to-interconnect/ function is tested on 100% of
inverters produced? /(i.e. every single inverter is tested with AC
DC within the start parameters of the unit for at
On 10/9/2010 3:07 PM, Carl Hansen wrote:
Greetings,
Does anyone know if newer Macintosh computers are still
incompatible with Modsine inverters, and how about Mac loptops ?
Thanks,
Carl Hansen
HansenSun elect.
My Mac Book Pro (from early 2009) worked off of a
various aspects of the product for verification
-- including the software.
The overall UL1741 certification process is extremely complex, very
time consuming, and quite expensive.
Dan
--- On *Fri, 10/8/10, boB Gudgel /b...@midnitesolar.com/* wrote:
From: boB Gudgel b...@midnitesolar.com
On 10/20/2010 12:16 PM, jay peltz wrote:
Hi Jeff,
Its not the voltage but amps, the apollo is only 80amps, and the old
MX's you can push to 70 so no real advantage there.
j
I think that what he means is that by switching to a 48V battery you can
have (add)
twice as much array power
On 10/22/2010 10:25 AM, Allan Sindelar wrote:
Ray,
I don't think Robin has posted anything, it just came in a
conversation we had. As I understand it, service equipment must have
nothing interfering with designated working clearance, within a few
inches of depth allowed. With Outback, Magnum,
On 11/20/2010 4:36 PM, Mark Frye wrote:
From the 2006 white paper:
*
Polarization
*
Incorrect grounding of SunPower modules can inducea surface charge
which would lower the energyproduction. Previously SunPower has
announced the
discovery of the surface polarization effect which creates
On 1/28/2011 8:41 AM, Solar Energy Solutions wrote:
Joel,
Our company cannot survive without selling an entire system. When we
help the unqualified and untrained we legitimize unsubstantiated pv
businesses. We get a dozen phone calls a month from folks wanting us
to install their systems.
On 2/8/2011 3:40 PM, David Brearley wrote:
However, the term panel does appear in the NEC in the context of Article
690 Solar Photovoltaic Systems. (You'll have to submit a proposal to the
Code Making Panel to change the name of the Article, Michael.) Panel is
defined a collection of modules
On 3/19/2011 7:53 AM, Drake wrote:
Hello Wrenches,
I had an inquiry concerning the effect of EMP on photovoltaic
systems. We are heading for a period of solar activity that likely
will produce this effect. According to a local AEP (American Electric
Power) representative, the utility is
On 4/25/2011 8:56 AM, Mark Frye wrote:
Folks,
I have an Enphase D380 micro inverter sitting on my workbench (such as
it is).
With my ohm meter I can detect continuity between the chasis and the
AC equipment ground pin, between the chasis and the DC- pin, and
between the AC equipment
On 4/27/2011 3:51 PM, benn kilburn wrote:
Wrenches,
I have been asked about sizing PV systems for a couple different music
festivals that have been run solely off of generators in the past.
The problem i'm having is determining the energy consumption of
music/stage (amps, speakers, lights,
On 4/27/2011 4:50 PM, Starlight Solar, Larry Crutcher wrote:
Benn,
I've had requests like this in the past and have found in EVERY case
the customer has no idea that it will take a
$$$multi-tens-of-thousands to replace the generator power. If you have
the estimating experience, throw out a
Just as an aside, today's inverters are pretty much a Class D audio
amplifier anyway.
An inverter ~could~ actually be used for a subwoofer amplifer in some
cases.
I've always wanted to have an inverter with an audio jack on it just for
that and actually
did try that back a Trace
boB asked:
Does this customer have another charging source besides a generator, like PV?
Mick says:
No...that is unfortunate because the customer doesn't want to allow
the generator to grind away for the additional hours required for a full
recharge.
boB says: That's certainly
boB says:
I forgot one possibly important thing !!
Mick says:
The battery string is 400 amp hours, which also happens to be the
Magnum default. This setting pre-disposes the Magnum charger for a 120 minute
absorption period before shifting to float. 2% of 400 is only eight amps, so
I'll bet the
Hi David.
Gary Baxter says he apologizes for not having that exact wiring diagram
for the Kohler RES generator
and the answer you got over the phone. (we gotta get him on this list
too soon)
Magnum Energy does rely somewhat on customers to help with different
generator wiring if they
boB Gudgel wrote:
Hi David.
Gary Baxter says he apologizes for not having that exact wiring
diagram for the Kohler RES generator
and the answer you got over the phone. (we gotta get him on this
list too soon)
Magnum Energy does rely somewhat on customers to help with different
generator
From: The Office of Tom Duffy [EMAIL PROTECTED]
About 28 years ago I read a study, by either Niehoff or Prestolite, on the
pros and cons of soldering or crimping, heavy duty starter cables, for over
the road trucks.
The finding was, that a properly crimped lug made a solid (molecular)
Kelly Keilwitz, Whidbey Sun Wind wrote:
Hi All,
Xantrex is gone from Washington. I’m fairly sure that it’s complete.
They’ve been moving out since they bought Trace. Perhaps the Xantrex
rep can confirm.
-Kelly
I know that there is at least one (1) Xantrex person still here in
Ian Woofenden wrote:
Great stuff, Dan
I realize this subject should go to another list, but I had to mention
that if you receive flu shots, then you more than likely are also
injecting mercury by way of the preservative, Thimerosal, which in the
doses they give, are only insignificant if
Peter Parrish wrote:
Bill,
I looked into this several years ago, and I was able to get some digitized
I-V data. I can't find that now (but I will). The data supports my claim.
Vmp does change with irradiance. It just changes very little. Depends
on your definition of change I guess.
Date: Mon, 05 Jan 2009 16:07:58 -0500
From: Nicholas Ponzio npon...@buildingenergyus.com
I just got this email forwarded from a coworker that volunteers as a
firefigher. Your comments are welcome:
I agree that fire access may be restricted, but a bunch of this report I
would say is
Chris Schaefer wrote:
Also Robin at Midnight Solar has been promising to come out with a higher
VOC charge controller too. How about it Robin? I'll be needed one for this
spring for use at our Design and Training Center for use in a class. Be
happy to do some Beta testing for you.
Chris
David Katz wrote:
Hi Allan,
This is not an unusual problem. i have seen it with conventional
forced air heating systems. The burner controls would not run on A
Xantrex or Outback sine wave inverter. There is something about
waveforms from inverters designed by Trace legacy engineers. I
Travis Creswell wrote:
While were on the subject of magic boxes. Watch the top video in below
link. On the residential and commercial installs he tells you to watch the
power factor (which does improve) but at the top of the meter you also see
kW which they do not highlight. You'll have to
boB Gudgel wrote:
Mark Dickson wrote:
Hi Bob, From what I understand the State 108 code means that the
grid frequency is out of whack.
Frequency and voltage windows are both related to anti-islanding
detection, so I don't doubt you would receive this message.
I would be surprised if the error
Orion Thornton wrote:
Wrenches,
Can anyone help me to determine the commutation type and rated power
factor (%) for a Fronius 4000 IG. These are required line items on a
permit application. The options for commutation type are forced and
line. I feel like this may apply to older
paul wilkins wrote:
congratulations, ezra
Gee... I thought Ezra ~WAS~ already the head of all NAPCEP ??
Congrats anyhowz, Ezra !
boB
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Options
Larry Crutcher, Starlight Solar wrote:
If the SB50 is like other Solar Boost products, there is a zener diode
on the PV input that will open if the voltage exceeds the Voc maximum.
The controller will not burn up or be fried but you will have to
replace the diode. Why it has not happened yet
Wind-sun.com wrote:
Yes, it is a poor design. though you may not have any problems there
with the heat de-rating of the panels. If the panel temperature gets
under about 40C you may blow out the input. As long as you have a load
on the output of the contgroller, it will keep the voltage down,
solar...@aol.com wrote:
This is a brand new 5000 US. EMT on all dc runs. The radio is a
BOSE...and is 27 feet away. The interference is runs 24/7... so it
must be AC related.
Does the radio noise go away when you completely disconnect the SMA
inverter ?
boB
solar...@aol.com wrote:
It disappears when the breaker is thrown.
Pat Redgate
OK, is that the AC breaker or the PV input breaker ?
How about when you throw the PV input breaker (when not MPPTing) ? Does
that help ?
i.e. We know now that it's the inverter's auxiliary power supply, but
is
Allan Sindelar wrote:
Randy,
We have a very clean, very early used takeout SW4024 (serial #255 or
so) with Rev 1.0 firmware (and a few Rev. 4.01 chipsets to match
yours). It appears to have worked flawlessly for 15 years (there’s a
way to tell with the earliest ones). Contact me offlist if
Larry Crutcher, Starlight Solar wrote:
Hi Jay,
An interesting quandary indeed.
This is another good example of an application that I was trying to
grill Sunpower about --- as far as grounding their modules that need to
be positive grounded
in order to take advantage of their higher
, boB Gudgel wrote:
Larry Crutcher, Starlight Solar wrote:
Hi Jay,
An interesting quandary indeed.
This is another good example of an application that I was trying to
grill Sunpower about --- as far as grounding their modules that need
to be positive grounded
in order to take advantage
Allan Sindelar wrote:
Dan,
My understanding is that CBI breakers aren't based on a temperature-related
mechanical action, but a magnetic-hydraulic function. I recall that this
was marketed (by Outback? Robin?) as superior to thermal-trip mechanisms as
it was not prone to heat-induced nuisance
Nick Lucchese wrote:
Wrenches,
While we're on the subject of CBI breakers does anyone know a sure way
to distinguish between the AC and DC versions? Depending on the order
we get our stock from both Outback (or Outback vendors) as well as
directly from Midnite. It's obvious with Midnite's
factors.
Not 100% sure, but I think GT inverters would help not hurt the PF
problem in most situations.
Correct me on any and all of this, Oh fellow wrenches,
R. Walters
Solarray.com
NABCEP # 04170442
On Jul 30, 2009, at 9:19 AM, boB Gudgel wrote:
Ron Young wrote:
Ok, so all seem
or at least very low.
boB
boB Gudgel b...@midnitesolar.com wrote:
Matt wrote:
Possibly a PF question, or maybe one for Magnum - boB,
One of the guys at work is (almost) running a 3/4 hp sub pump with a Magna AE
48. Or rather, he isn't. According to him when he first fired
On Jul 30, 2009, at 4:03 PM, Matt wrote:
Unh - hunh, but it will run on the generator. If it didn't, I would
go for the bad starter or motor, but it seems like the PF could be
an issue??
Matt T
boB Gudgel b...@midnitesolar.com wrote:
Matt wrote:
Possibly a PF question, or maybe
...@lists.re-wrenches.org] On Behalf Of boB Gudgel
Sent: Thursday, July 30, 2009 4:45 PM
To: Matt
Cc: RE-wrenches
Subject: Re: [RE-wrenches] Power Factor
Matt wrote:
Possibly a PF question, or maybe one for Magnum - boB,
One of the guys at work is (almost) running a 3/4 hp sub pump with a Magna
North Texas Renewable Energy Inc wrote:
August
I made a service call to a residential PVinstallation several years
ago that I did not install. The vintage Trace, size I don't recall,
had quit working. The Delta surge suppressor had actually ruptured
along it's radial seam, a result I had
jay peltz wrote:
Hi Darryl,
But what are the differences and when do they come into play?
Question interruptus and my 2 cents worth, Jay...
Except for REAL long lines, like utility transmission lines, the AC skin
effect, which is what I think
you might be referring to here, is probably
not), a
motor starter problem or an inverter issue? I have to admit to being
somewhat baffled by this one because it ran the pump once, but not after.
Matt T
boB Gudgel b...@midnitesolar.com wrote:
boB Gudgel wrote:
So, because of the different ways of specifying PF, it is always best
Larry Crutcher, Starlight Solar wrote:
Hey Matt,
I sure wish their techie's would get to the bottom of it. I am getting
gun-shy about selling Magnum and they are about the best available for
small 12 volt systems. I have spend hours trying to solve the problem.
My customer is still not a
the peak
DC voltage seen at the inverter terminals due to L-C resonance.
boB
--- On Sat, 8/1/09, boB Gudgel b...@midnitesolar.com wrote:
From: boB Gudgel b...@midnitesolar.com
Subject: Re: [RE-wrenches] Magnum inverters (not really a power factor issue)
To: RE-wrenches re-wrenches@lists.re
Wind-sun.com wrote:
See http://en.wikipedia.org/wiki/Eddy_current
The practical effects of running a single wire in 98% of the systems
that any solar installers will ever see is probably just about zero,
and it also only applies to AC currents (or rapidly varying DC, which
is not common).
Matt Tritt wrote:
Darryl,
Say what?! This would seem to indicate that solid core is actually
better for DC than stranded wire. Can this possibly be true??
Matt
The reason that stranded is higher resistance than solid is that there
is more air in between the strands. Solid
wire doesn't
Marv Dargatz wrote:
Check out the following link. Just ONE example of what the utility
must deal with.
http://tdworld.com/customer_service/power_new_technology_solves/
I'm not defending the utilities. They definitely have their faults
(argh, argh), but they have some severe challenges that
Drake Chamberlin wrote:
One question about power factor:
We know it is the ratio of the real power to the apparent power, and
that most utility meters only register real power (watts). Reactive
power doesn't dissipate as heat like power loss through a resistor.
The question is: What is
temperature
superconductors will play a big roll in reducing all losses.
boB
Brian Teitelbaum
AEE Solar
-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of boB Gudgel
Sent: Wednesday, August 19, 2009 9:28 PM
Conrad Geyser wrote:
We always fill any conduit at the point of building penetrations for
air sealing. Otherwise in winter, not only will the conduit get house
moisture condensing inside of it, but it will act a a nice thermo
siphon for pulling warm air out of the house…..
Just a note
Jason Lerner wrote:
Hi Bob,
I put on an old Todd charger with Voltage regulation, but not absorb
and float. I can change the voltage up or down as needed. Changing
out the remote is a good idea. I do have another Magnum inverter at
another location, but was trying to avoid another
boB Gudgel wrote:
Jason Lerner wrote:
Hi Bob,
I put on an old Todd charger with Voltage regulation, but not absorb
and float. I can change the voltage up or down as needed. Changing
out the remote is a good idea. I do have another Magnum inverter at
another location, but was trying
Jeff Yago wrote:
There have been some good advice related to battery bank sizing and a better
description of how Sunny Islands work with SunnyBoys, but I am afraid we are
getting away from my original post that started this and that was:
Since a battery based inverter has a battery charging
Brian Teitelbaum wrote:
William,
The SW Parallel Stacking Interface (SWI/PAR) was much more than just a
cable (like the Series Stacking Cable -SWI). it was a separate box,
like the Grid Tie Interface (GTI) unit was. It retailed for about $345.00
Good luck finding one.
Brian
Antony Tersol wrote:
Assume 3 parallel battery stings, with identical batteries of internal
resistance r.
Assume identical wire leads of resistance R.
Then when the batteries have the same state of charge and their
internal resistances are equal, one can solve for the current in each
OK, I've been hearing for years now that one battery string is best and
maybe two but no more should be used.
What is the reason for this fear ???What is the experience with
multiple strings in parallel ??
If it is because of current sharing of the strings, that shouldn't be an
was system
reliability and redundancy and the idea of a single string failure was
a big worry which is why I never would consider it.
Tom
*From:* boB Gudgel mailto:b...@midnitesolar.com
*Sent:* Tuesday, May 31, 2011 8:16 PM
*To:* RE-wrenches mailto:re-wrenches@lists.re-wrenches.org
*Subject:* Re: [RE
business.
Larry Crutcher
Starlight Solar Power Systems
11871 S Fortuna Road, #210
Yuma, AZ 85367
la...@starlightsolar.com mailto:la...@starlightsolar.com
(928) 342-9103
On May 31, 2011, at 11:16 PM, boB Gudgel wrote:
OK, I've been hearing for years now that one battery string is best
and maybe
with the imager.
I just wish they were cheaper !
boB
boB Gudgel wrote at 01:00 AM 6/1/2011:
This might be a good reason for an installer to have one of those FLIR (or
similar) thermal imager cameras.  They're a bit on the expensive side, but
could
really be helpful for so many things. Â
it for finding uninsulated spaces, but cannot
attest to its durability or suitability for the other uses
mentioned above.
boB Gudgel wrote at 01:00 AM 6/1/2011:
This might be a good reason for an installer to have one of those
FLIR (or similar) thermal imager cameras.  They're a bit
Bank comparison
From: boB Gudgel b...@midnitesolar.com mailto:b...@midnitesolar.com
Date: Thu, June 02, 2011 8:56 pm
To: RE-wrenches re-wrenches@lists.re-wrenches.org
mailto:re-wrenches@lists.re-wrenches.org
Nobody mentioned this in this thread, but it occurs to me
On 6/30/2011 8:35 PM, Nick Vida wrote:
Hi wrenches.
I had an interesting case today that I have been thinking about since
it happened. I dont have all the details because the homeownter had to
leave before I was done with the service call, but here is what I do
know. SB5000 with 2 strings of
...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *boB
Gudgel
*Sent:* Thursday, June 30, 2011 10:19 PM
*To:* RE-wrenches
*Cc:* Nick Vida
*Subject:* Re: [RE-wrenches] how would you measure a partial short circuit
On 6/30/2011 8:35 PM, Nick Vida wrote:
Hi
On 6/30/2011 8:35 PM, Nick Vida wrote:
Hi wrenches.
I had an interesting case today that I have been thinking about since
it happened. I dont have all the details because the homeownter had to
leave before I was done with the service call, but here is what I do
know. SB5000 with 2 strings of
On 6/30/2011 11:35 PM, boB Gudgel wrote:
On 6/30/2011 8:35 PM, Nick Vida wrote:
Hi wrenches.
I had an interesting case today that I have been thinking about since
it happened. I dont have all the details because the homeownter had
to leave before I was done with the service call, but here
On 7/1/2011 12:07 AM, boB Gudgel wrote:
On 6/30/2011 11:35 PM, boB Gudgel wrote:
On 6/30/2011 8:35 PM, Nick Vida wrote:
Hi wrenches.
I had an interesting case today that I have been thinking about
since it happened. I dont have all the details because the
homeownter had to leave before I
/2011 12:12 AM, boB Gudgel wrote:
On 7/1/2011 12:07 AM, boB Gudgel wrote:
On 6/30/2011 11:35 PM, boB Gudgel wrote:
On 6/30/2011 8:35 PM, Nick Vida wrote:
Hi wrenches.
I had an interesting case today that I have been thinking about
since it happened. I dont have all the details because
On 7/14/2011 1:43 PM, Allan Sindelar wrote:
Wrenches,
I'm stumped as to the best approach for a customer who wants a
non-grid-tied, batteryless PV-powered EV charging station. See below,
from one of our salespeople. Any ideas?
Thank you,
Allan
So, does this car in the car charging station
On 7/19/2011 2:34 PM, David Brearley wrote:
Presumably the latter---added as part of the cycle of revisions
initiated in 1987.
The array shorting requirement must have gone away near 1993 or 1994 as
I designed an opening and shorting of the array style GFPD version in
1994 while at Trace
On 7/26/2011 4:42 PM, Joel Davidson wrote:
Power factor less than 1.0 can shorten the life of and damage
equipment and reduce PV production. We installed a 200 kW PV system on
a facility with a lot of 3-phase motors and monitored the PV and the
grid. We measured around 0.7 PF being delivered
Do you just want to charge batteries and are these regular 120VAC SWs
?? 120/208 ??
If so, you should just be able to connect each SW from neutral to hot.
No stacking necessary.
A regular SW stacking cable won't work for delta connections because
that assumes
the phases are going to
On 7/28/2011 12:32 PM, William Miller wrote:
Friends:
First of all, the inverters are PS series, not SW.
Second, I have created a solution: I can acquire a transformer that
will connect a primary across two of the 208 generator phases and
create 120/240 off of the secondary. This will
Of *boB
Gudgel
*Sent:* Thursday, July 28, 2011 10:56 AM
*To:* RE-wrenches
*Subject:* Re: [RE-wrenches] 2 SW inverters on three phase
Do you just want to charge batteries and are these regular 120VAC
SWs ?? 120/208 ??
If so, you should just be able to connect each SW from neutral to
hot
On 8/15/2011 6:34 PM, Darryl Thayer wrote:
Hi wrenches, I have been informed off list that my system is not a
supported configuration, that one phase can be paralelled, but the
other two can not, one only on each of the other legs. So unless
Outback comes back with more info, I was wrong.
On 8/18/2011 11:10 AM, Marco Mangelsdorf wrote:
Evergreen Solar, one of the last remaining independent U.S. module
manufacturers, announced their plan to file for bankruptcy protection
this week.
Done in by plummeting module pricing no doubt.
I'm sure you all are getting the same kind of
I am sad to report that /Louis Valenta of interisland Solar in Hawaii
has passed away in the last few days.
Louis had a heart attack about a week ago and this is probably related
to that.
//He was a very good person, friend and also extremely knowledgeable in
our industry.
//
We will
On 9/3/2011 7:57 PM, Darryl Thayer wrote:
I have had one experiance with equalizers, the batteries be came very
unequal. (over time of course)
*From:* R Ray Walters r...@solarray.com
*To:* RE-wrenches re-wrenches@lists.re-wrenches.org
*Sent:* Saturday, September 3, 2011 5:55 PM
*Subject:* Re:
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