<br>Interesting update.... I've installed dozens of non-isolated transformerless inverters <br>with LADWP customers since those genius inverters first became available from <br>Power-One's inverter ancestor, Magnetek. I don't remember ever having a conflict or <br>
technical issue with an engineer or inspector questioning the suitability of that class <br>of inverter, or even looking for the double-insulated solar wire that is supposed to be <br>required for the exposed solar wires. <br>
<br>/wk<br><br><br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Date: Mon, 16 Apr 2012 09:05:24 -0700<br>
From: "Joel Davidson" <<a href="mailto:joel.davidson@sbcglobal.net">joel.davidson@sbcglobal.net</a>><br>
To: "RE-wrenches" <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>><br>
Subject: [RE-wrenches] Transformerless inverter reliability<br>
Message-ID: <96EAA55766654E9C812C769F3412FD7F@JOEL><br>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";<br>
reply-type=original<br>
<br>
Wrenches,<br>
Los Angeles Department of Water & Power (LADWP), the largest and most<br>
influential municipal utility in the US is finally going to allow<br>
transformerless inverters for residential PV systems. Are there any design,<br>
installation or reliability issues to consider with the SMA and other<br>
high-frequency transformerless inverters. Can they be mounted on a hot south<br>
or west wall or do the have to be kept cool in the shade?<br>
Joel Davidson<br>
<br>
<br>
<br>
------------------------------<br>
<br>
Message: 16<br>
Date: Mon, 16 Apr 2012 08:58:37 -0600<br>
From: "Dana" <<a href="mailto:dana@solarwork.com">dana@solarwork.com</a>><br>
To: "'RE-wrenches'" <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>><br>
Subject: Re: [RE-wrenches] Trace Change out<br>
Message-ID: <009001cd1be1$67d5aa60$3780ff20$@com><br>
Content-Type: text/plain; charset="iso-8859-1"<br>
<br>
Ditto Excellent service from One stop.<br>
<br>
<br>
<br>
Thanks<br>
<br>
Dana Orzel - Great Solar Works, Inc - E - <a href="mailto:dana@solarwork.com">dana@solarwork.com</a> - V<br>
<a href="tel:970.626.5253" value="+19706265253">970.626.5253</a><br>
<br>
F - <a href="tel:970.626.4140" value="+19706264140">970.626.4140</a> C - <a href="tel:970.209.4076" value="+19702094076">970.209.4076</a> web - <a href="http://www.solarwork.com" target="_blank">www.solarwork.com</a><br>
<br>
"Responsible Technologies for Responsible People since 1988"<br>
<br>
P Please consider the environment before printing this email<br>
<br>
<br>
<br>
From: <a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a><br>
[mailto:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>] On Behalf Of mac Lewis<br>
Sent: Sunday, April 15, 2012 7:08 AM<br>
To: RE-wrenches<br>
Subject: Re: [RE-wrenches] Trace Change out<br>
<br>
<br>
<br>
Hi Allan,<br>
<br>
<br>
<br>
I have used the One Stop Cop Shop in Colorado Springs for repairs on an SW<br>
recently, with success. They can be contacted at <a href="tel:%28719%29%20495-2740" value="+17194952740">(719) 495-2740</a>. I have<br>
found it has been best for customers to deal directly with them, because<br>
repairs can vary widely in price, based on what has failed.<br>
<br>
<br>
<br>
Cheers<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
On Sun, Apr 15, 2012 at 6:32 AM, <<a href="mailto:dan@foxfire-energy.com">dan@foxfire-energy.com</a>> wrote:<br>
<br>
As I recall, AC IN2 sets the Gen input limit, any load beyond that the<br>
inverter lights up and makes up the difference. Batt charge amps AC sets the<br>
charge rate (up to the AC IN set point). SWs have been the industry war<br>
horse for years. And for lots of folks, are still the cat's pajamas<br>
(especially if they're set up so the defaults work out), but I've been<br>
replacing gobs of them (Especially Grid Tied). I like Outback only only<br>
because I'm more familiar with them (and I'm in love with Katy), but Magnum<br>
seems to have more bells and whistles. I'll need to be heading that way PDQ.<br>
(Just to tune in).<br>
<br>
<br>
<br>
I think Tekris Power out of NJ still repairs SWs (But not SW Plus?).<br>
<br>
<br>
<br>
Good luck.<br>
<br>
<br>
<br>
db<br>
<br>
<br>
<br>
<br>
Dan Brown<br>
Foxfire Energy Corp.<br>
Renewable Energy Systems<br>
<a href="tel:%28802%29-483-2564" value="+18024832564">(802)-483-2564</a><tel:%28802%29-483-2564><br>
<a href="http://www.Foxfire-Energy.com" target="_blank">www.Foxfire-Energy.com</a><br>
NABCEP #092907-44<br>
<br>
<br>
<br>
-------- Original Message --------<br>
Subject: [RE-wrenches] Trace Change out<br>
<br>
From: "frenergy" <<a href="mailto:frenergy@psln.com">frenergy@psln.com</a>><br>
Date: Sat, April 14, 2012 9:21 pm<br>
To: <<a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a>><br>
<br>
Wrenches,<br>
<br>
<br>
<br>
I have a customer that may be having some issues with the<br>
reliability of his 11 year old Trace4024. If my current fix doesn't solve<br>
the problem, I have suggested having the unit fixed, which I think still<br>
happens on these puppies. I have also suggested replacing it with either an<br>
Outback 3524 or a Magnum MS 4024. He is now running a 1 HP Submersible pump<br>
ala autoformer along with the usual array of house loads.<br>
<br>
<br>
<br>
The issue is the inverter accepting and then rejecting the generator<br>
power, which I have been watching recent comments here regarding this issue.<br>
I have not thoroughly checked out pump wiring (was apparently already done<br>
by the well/pump guy, whom is reputable), but have checked the output of the<br>
Kohler 8.5 genny and Hz and voltage appear stable with and without load. So<br>
far I've gone the route of programming in a few less amps on the "battery<br>
charging" and "AC2 IN" functions. The inverter seems to be happy with new<br>
settings, this new programming was just done a few hours ago.<br>
<br>
<br>
<br>
So this may be a more generic question for those with more<br>
experience than I: Are both the OB and Magnum inverters considered equally<br>
capable of replacing the Trace? I guess I'm thinking mainly of that pump,<br>
but are there other considerations?<br>
<br>
<br>
<br>
Thanks Folks<br>
<br>
<br>
<br>
Bill<br>
<br>
Feather River Solar Electric<br>
4291 Nelson St.<br>
Taylorsville, CA 95983<br>
530-284-7849/6544 fax<br>
<br>
solar powered since 1982<br>
<br>
<br>
_____<br>
<br>
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End of RE-wrenches Digest, Vol 5, Issue 113<br>
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</blockquote></div><br>