Just for history sake, there actually WAS a dongle with a 9 volt battery
and 5 volt regulator in it that plugged
into the SW's parallel/stacking D-sub connector because there was access
to the internal 5 volt line.
I remember that because I designed it some time in the 1990's....
Then the SW Plus came (?) out that had flash in it that did remember
the settings.
boB
On 5/15/2012 2:03 PM, Allan Sindelar wrote:
Glenn,
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.
Don't be afraid of this approach. It's much easier than you might fear.
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.
If that's the case, contact me off list and I'll give you some typical
settings to put in.
Allan
*Allan Sindelar*
_Allan@positiveenergysolar.com_ <mailto:al...@positiveenergysolar.com>
NABCEP Certified Photovoltaic Installer
NABCEP Certified Technical Sales Professional
New Mexico EE98J Journeyman Electrician
Founder and Chief Technology Officer
*Positive Energy, Inc.*
3209 Richards Lane (note new address)
Santa Fe, New Mexico 87507
*505 424-1112*
_www.positiveenergysolar.com_ <http://www.positiveenergysolar.com/>
*
*
On 5/15/2012 2:44 PM, Glenn Burt wrote:
Hello wrenches,
I am quoting a job to do a simple battery bank replacement on an
existing system that has a Trace SW4048 inverter.
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.
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?
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?
Thanks,
Glenn Burt
glb, Consulting Company
NABCEP Certified Solar PV Installer TM
NYSERDA Eligible Installer
Microsoft Certified Professional
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