[RE-wrenches] RE-wrenches Digest, Vol 5, Issue 113

Wed Apr 18 23:44:01 PDT 2012

Interesting update.... I've installed dozens of non-isolated
transformerless inverters
with LADWP customers since those genius inverters first became available
from
Power-One's inverter ancestor, Magnetek. I don't remember ever having a
conflict or
technical issue with an engineer or inspector questioning the suitability
of that class
of inverter, or even looking for the double-insulated solar wire that is
supposed to be
required for the exposed solar wires.

/wk

Date: Mon, 16 Apr 2012 09:05:24 -0700
> From: "Joel  Davidson" <joel.davidson at sbcglobal.net>
> To: "RE-wrenches" <re-wrenches at lists.re-wrenches.org>
> Subject: [RE-wrenches] Transformerless inverter reliability
> Message-ID: <96EAA55766654E9C812C769F3412FD7F at JOEL>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>        reply-type=original
>
> Wrenches,
> Los Angeles Department of Water & Power (LADWP), the largest and most
> influential municipal utility in the US is finally going to allow
> transformerless inverters for residential PV systems. Are there any design,
> installation or reliability issues to consider with the SMA and other
> high-frequency transformerless inverters. Can they be mounted on a hot
> south
> or west wall or do the have to be kept cool in the shade?
> Joel Davidson
>
>
>
> ------------------------------
>
> Message: 16
> Date: Mon, 16 Apr 2012 08:58:37 -0600
> From: "Dana" <dana at solarwork.com>
> To: "'RE-wrenches'" <re-wrenches at lists.re-wrenches.org>
> Subject: Re: [RE-wrenches] Trace Change out
> Message-ID: <009001cd1be1$67d5aa60$3780ff20$@com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Ditto Excellent service from One stop.
>
>
>
> Thanks
>
> Dana Orzel -  Great Solar Works, Inc -  E - dana at solarwork.com -  V
> 970.626.5253
>
> F - 970.626.4140     C - 970.209.4076     web - www.solarwork.com
>
> "Responsible Technologies for Responsible People since 1988"
>
> P Please consider the environment before printing this email
>
>
>
> From: re-wrenches-bounces at lists.re-wrenches.org
> [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of mac Lewis
> Sent: Sunday, April 15, 2012 7:08 AM
> To: RE-wrenches
> Subject: Re: [RE-wrenches] Trace Change out
>
>
>
> Hi Allan,
>
>
>
> I have used the One Stop Cop Shop in Colorado Springs for repairs on an SW
> recently, with success.  They can be contacted at  (719) 495-2740.  I have
> found it has been best for customers to deal directly with them, because
> repairs can vary widely in price, based on what has failed.
>
>
>
> Cheers
>
>
>
>
>
>
>
>
>
> On Sun, Apr 15, 2012 at 6:32 AM, <dan at foxfire-energy.com> wrote:
>
> As I recall, AC IN2 sets the Gen input limit, any load beyond that the
> inverter lights up and makes up the difference. Batt charge amps AC sets
> the
> charge rate (up to the AC IN set point). SWs have been the industry war
> horse for years. And for lots of folks, are still the cat's pajamas
> (especially if they're set up so the defaults work out), but I've been
> replacing gobs of them (Especially Grid Tied). I like Outback only only
> because I'm more familiar with them (and I'm in love with Katy), but Magnum
> seems to have more bells and whistles. I'll need to be heading that way
> PDQ.
> (Just to tune in).
>
>
>
> I think Tekris Power out of NJ still repairs SWs (But not SW Plus?).
>
>
>
> Good luck.
>
>
>
> db
>
>
>
>
> Dan Brown
> Foxfire Energy Corp.
> Renewable Energy Systems
> (802)-483-2564 <tel:%28802%29-483-2564>
> www.Foxfire-Energy.com
> NABCEP #092907-44
>
>
>
> -------- Original Message --------
> Subject: [RE-wrenches] Trace Change out
>
> From: "frenergy" <frenergy at psln.com>
> Date: Sat, April 14, 2012 9:21 pm
> To: <RE-wrenches at lists.re-wrenches.org>
>
> Wrenches,
>
>
>
>        I have a customer that may be having some issues with the
> reliability of his 11 year old Trace4024.  If my current fix doesn't solve
> the problem, I have suggested having the unit fixed, which I think still
> happens on these puppies. I have also suggested replacing it with either an
> Outback 3524 or a Magnum MS 4024.  He is now running a 1 HP Submersible
> pump
> ala autoformer along with the usual array of  house loads.
>
>
>
>        The issue is the inverter accepting and then rejecting the generator
> power, which I have been watching recent comments here regarding this
> issue.
> I have not thoroughly checked out pump wiring (was apparently already done
> by the well/pump guy, whom is reputable), but have checked the output of
> the
> Kohler 8.5 genny and Hz and voltage appear stable with and without load.
>  So
> far I've gone the route of programming in a few less amps on the "battery
> charging" and "AC2 IN" functions.   The inverter seems to be happy with new
> settings, this new programming was just done a few hours ago.
>
>
>
>        So this may be a more generic question for those with more
> experience than I: Are both the OB and Magnum inverters considered equally
> capable of replacing the Trace? I guess I'm thinking mainly of that pump,
> but are there other considerations?
>
>
>
>        Thanks Folks
>
>
>
> Bill
>
> Feather River Solar Electric
> 4291 Nelson St.
> Taylorsville, CA  95983
> 530-284-7849/6544 fax
>
> solar powered since 1982
>
>
>  _____
>
>
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> --
>
>
>
>
>
>
>
> Mac Lewis
>
> "Yo solo s? que no s? nada." -S?crates
>
>
>
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> End of RE-wrenches Digest, Vol 5, Issue 113
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