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SMA uses a breaker for the switch in Sunny Island. Technically, it
isn't a "disconnect" because it is part of equipment that may need to
be removed for service.<br>
<br>
Kent Osterberg<br>
Blue Mountain Solar, Inc<br>
<br>
<br>
Walt Ratterman wrote:
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<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">Hello
Mick,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">The
way I understand it, the DC switch on the SI is really an on
off switch and not a circuit breaker. SMA recommends that the system
has other
overcurrent protection. The main value of the DC switch that I could
see is
that it provides an easier re-set point. (There are some power saving
conditions that require re-setting rather than auto-re-start.)<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">And….
Since Outback has in their catalog using the Flexware mounted
in this configuration, I would say the breakers are fine to be mounted
in this fashion.
Worth checking though, of course. I do know that you are not supposed
to mount
the DC breakers upside down (such as on the bottom of the flexware,
where you
would have to reach under the can to operate the breaker…..)<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">Walt<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">SEPI<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span
style="font-size: 10pt; font-family: "Tahoma","sans-serif";">From:</span></b><span
style="font-size: 10pt; font-family: "Tahoma","sans-serif";"> Mick
Abraham
[<a class="moz-txt-link-freetext" href="mailto:mick@abrahamsolar.com">mailto:mick@abrahamsolar.com</a>] <br>
<b>Sent:</b> Wednesday, October 07, 2009 6:41 PM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:wratterman@sunenergypower.com">wratterman@sunenergypower.com</a>; RE-wrenches<br>
<b>Subject:</b> Re: [RE-wrenches] Sunny Island DC Load Centers,
Sealed
Batteries<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom: 12pt;">Hi, two questions:<br>
<br>
(1) Doesn't each Sunny Island unit already include a DC disconnect
breaker for
the connection to battery?<br>
<br>
(2) Aren't those big DC breakers in the Outback boxes restricted for
"vertical installation only"?<br>
<br>
I've got my own 3 phase Sunny Island thing coming up (maybe) so I look
forward
to these answers.<br>
<br clear="all">
Mick Abraham, Proprietor<br>
<a moz-do-not-send="true" href="http://www.abrahamsolar.com">www.abrahamsolar.com</a><br>
<br>
Voice: 970-731-4675<br>
<br>
<o:p></o:p></p>
<div>
<p class="MsoNormal">On Wed, Oct 7, 2009 at 7:26 PM, Walt Ratterman
<<a moz-do-not-send="true"
href="mailto:wratterman@sunenergypower.com">wratterman@sunenergypower.com</a>>
wrote:<o:p></o:p></p>
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<p class="MsoNormal" style=""><span
style="font-size: 11pt; color: rgb(31, 73, 125);">Hello Kirpal,</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span
style="font-size: 11pt; color: rgb(31, 73, 125);"> </span><o:p></o:p></p>
<p class="MsoNormal" style=""><span
style="font-size: 11pt; color: rgb(31, 73, 125);">Walt Ratterman
here. I can respond
to at least the first part.</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span
style="font-size: 11pt; color: rgb(31, 73, 125);"> </span><o:p></o:p></p>
<p class="MsoNormal" style=""><span
style="font-size: 11pt; color: rgb(31, 73, 125);">In Burundi, we used
three 5 KW Sunny
Island 5048’s in a three phase configuration. </span><o:p></o:p></p>
<p class="MsoNormal" style=""><span
style="font-size: 11pt; color: rgb(31, 73, 125);"> </span><o:p></o:p></p>
<p class="MsoNormal" style=""><span
style="font-size: 11pt; color: rgb(31, 73, 125);">For all of the DC
and AC breakers,
wireways, etc., etc., we used the Outback Flexware equipment.</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span
style="font-size: 11pt; color: rgb(31, 73, 125);"> </span><o:p></o:p></p>
<p class="MsoNormal" style=""><span
style="font-size: 11pt; color: rgb(31, 73, 125);">We put the DC on the
bottom and the AC
on the top. Due to the width of the SI’s, we used 2 – FW1000 systems
to
do this. (And I am glad – we actually needed all of the wiring
space. I think it would work really well for your system.</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span
style="font-size: 11pt; color: rgb(31, 73, 125);"> </span><o:p></o:p></p>
<p class="MsoNormal" style=""><span
style="font-size: 11pt; color: rgb(31, 73, 125);">Of course, there may
be some other good
choices that I would be anxious to learn about as well.</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span
style="font-size: 11pt; color: rgb(31, 73, 125);"> </span><o:p></o:p></p>
<p class="MsoNormal" style=""><span
style="font-size: 11pt; color: rgb(31, 73, 125);">You can see some
good photos of this
installation at our photo gallery – linked form our Home Page at <a
moz-do-not-send="true" href="http://www.sunepi.org" target="_blank">www.sunepi.org</a>.
Click on
the cover for the photos for the Burundi / Kigutu / Village Health
Works / SELF
project.</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span
style="font-size: 11pt; color: rgb(31, 73, 125);"> </span><o:p></o:p></p>
<p class="MsoNormal" style=""><span
style="font-size: 11pt; color: rgb(31, 73, 125);">Feel free to holler
if you need any
specifics on how we did anything here.</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span
style="font-size: 11pt; color: rgb(31, 73, 125);"> </span><o:p></o:p></p>
<p class="MsoNormal" style=""><span
style="font-size: 11pt; color: rgb(31, 73, 125);">OH – on your other
question…I have no
experience on large sealed banks, but Rolls now has AGM’s that start at
T-105
size, include the 8G8D sizes, and then go all the way up to 2V 3300 Ah.</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span
style="font-size: 11pt; color: rgb(31, 73, 125);"> </span><o:p></o:p></p>
<p class="MsoNormal" style=""><span
style="font-size: 11pt; color: rgb(31, 73, 125);">Thanks!!</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span
style="font-size: 11pt; color: rgb(31, 73, 125);"> </span><o:p></o:p></p>
<p class="MsoNormal" style=""><span
style="font-size: 11pt; color: rgb(31, 73, 125);">Walt</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span
style="font-size: 11pt; color: rgb(31, 73, 125);"> </span><o:p></o:p></p>
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<p class="MsoNormal" style=""><b><span style="font-size: 10pt;">From:</span></b><span
style="font-size: 10pt;"> <a moz-do-not-send="true"
href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a>
[mailto:<a moz-do-not-send="true"
href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a>]
<b>On Behalf Of </b>Kirpal
Khalsa<br>
<b>Sent:</b> Wednesday, October 07, 2009 6:15 PM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> [RE-wrenches] Sunny Island DC Load Centers, Sealed
Batteries</span><o:p></o:p></p>
</div>
<div>
<div>
<p class="MsoNormal" style=""> <o:p></o:p></p>
<p class="MsoNormal" style="">Hi
Folks......we have an upcoming Sunny Island/Sunny Boy AC Coupled system
installation.....We have mostly done Outback and Xantrex battery based
systems.......and like the available supporting DC load centers with
main
breakers and other DC load and charging breakers......<br>
What are folks using for the Sunny Island products? Outback Flexware DC
500's?
or 1000's?<br>
This particular system will consist of 4 Sunny Islands and therefore
will need
four main breakers...... We primarily need a breaker box to locate our
main DC breakers coming from the battery bank.......Any advice,
experiences
would be appreciated......<br>
<br>
Also on that note.....anyone wish to share any experience or advice on
the GNB
Absolyte GX series batteries or the East Penn Deka UnigyII as a standby
grid
connected back up battery bank....They both seem like they are good for
primarily hanging out in float with occasional deep discharges not
negatively
affecting the health of the batteries.....This is the type of service
we expect
the batteries will be in primarily......Any recommendations of one
brand over
the other.....The vertical stacking seems convenient as far as space is
concerned.....maintenece free......any recommendations on a good
supplier on
the west coast? Any other brands i should be looking at in the sealed
battery category for a fairly large Ah battery bank?<br>
100 thanks !<br>
-- <br>
Sunny Regards,<br>
Kirpal Khalsa<br>
NABCEP Certified Solar PV Installer<br>
Renewable Energy Systems<br>
<a moz-do-not-send="true" href="http://www.oregonsolarworks.com"
target="_blank">www.oregonsolarworks.com</a><br>
541-218-0201 m<br>
541-592-3958 o<o:p></o:p></p>
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_______________________________________________<br>
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