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Just for history sake, there actually WAS a dongle with a 9 volt
battery and 5 volt regulator in it that plugged<br>
into the SW's parallel/stacking D-sub connector because there was
access to the internal 5 volt line. <br>
I remember that because I designed it some time in the 1990's.... <br>
Then the SW Plus came (?) out that had flash in it that did
remember the settings.<br>
<br>
boB<br>
<br>
<br>
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On 5/15/2012 2:03 PM, Allan Sindelar wrote:
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type="cite">
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Glenn,<br>
For someone who has worked on these, it takes maybe 5 minutes to
reprogram one. First time, might take you 20 minutes at most.
Reprogramming is way quicker and cheaper than buying and
installing a 3rd-party device. I'd suggest that you make two
copies of the settings page (the newer version - that is, the
145-page version - of the manual has a fill-in-the-blanks page for
each voltage), take it to the site, go through the settings in
headings 9 and up, write them down in pencil, swap the batteries,
then re-enter the settings. Typically there are only a half dozen
or so that are set to other than default. By making two copies,
the customer gets one (and is impressed by the quality of your
service), and you keep one in the customer's file. <br>
Don't be afraid of this approach. It's much easier than you might
fear.<br>
And it's often the case that at some point the big DC breaker was
turned off and the settings were lost anyway. If bulk and EQ
voltages are at 57.6V, and the batteries are flooded, that has
occurred, and has likely contributed to early battery failure. I
have seen this a number of times.<br>
If that's the case, contact me off list and I'll give you some
typical settings to put in.<br>
Allan<br>
<br>
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<font face="Times New Roman, Times, serif"><b>Allan Sindelar</b></font><br>
<small><a moz-do-not-send="true"
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<span style="font-size: 10pt;">NABCEP Certified Photovoltaic
Installer<br>
NABCEP Certified Technical Sales Professional<br>
New Mexico EE98J Journeyman Electrician<br>
Founder and Chief Technology Officer<br>
<b>Positive Energy, Inc.</b><br>
3209 Richards Lane (note new address)<br>
Santa Fe, New Mexico 87507<br>
<b>505 424-1112</b><br>
<a moz-do-not-send="true"
href="http://www.positiveenergysolar.com/" target="_blank"><u>www.positiveenergysolar.com</u></a><o:p></o:p></span></font>
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<br>
On 5/15/2012 2:44 PM, Glenn Burt wrote:
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<p class="MsoNormal">Hello wrenches,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am quoting a job to do a simple battery
bank replacement on an existing system that has a Trace
SW4048 inverter.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have not done any substantial work on
these revered systems, but seem to remember that removing
the batteries will lose all the custom program settings in
the inverter.<o:p></o:p></p>
<p class="MsoNormal">I seem to recall there was a product that
could be purchased that used a 9V battery to hold up the
setting memory while the main batteries were disconnected.
Could anyone tell me the name of it?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Or is there a better solution out there?
I see a couple of products that claim to read/write the SW
memory from Right Hand Engineering and Maui Solar Software –
anyone used them or recommend against them?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:Consolas">Glenn Burt<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:Consolas">glb,
Consulting Company<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:Consolas">NABCEP
Certified Solar PV Installer TM<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:Consolas">NYSERDA
Eligible Installer<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:Consolas">Microsoft
Certified Professional<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p>
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