[RE-wrenches] SI6048 AC Coupled with an Old Sunny Boy 4000US

[Mac Lewis]

Hi Lou,

It does sound like you may need a firmware update but it may have been pre
configured for you long ago.

When you interconnect with the Sunny Boy through the Webbox,  if you are
off-grid, the country code parameter may say something like Default and/or
Cntry Set.  Then, you would program this parameter to be Off-grid or
Off-grid 60 (for 60 Hz grid).  It should auto populate adjusted parameters.

As far as the PV only vs Gen question.  If you have a generator connected
to the Sunny Island, you will want to use "Gen".  PV only means that there
is no grid or generator in the system, just a Sunnyboy downstream of the
load terminals, typically back feeding the load center.

Good luck, I have forgotten almost everything about the Sunny Island now!




On Mon, May 26, 2025 at 10:33 PM Lou Russo via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Aloha All,
>
> I am messing around with a system in our shop just 'cause I wanted to mess
> around with AC coupled systems at my leisure.  This setup is completely
> off-grid. I have an autoformer between the SB and the SI.
>
> I am able to make changes to the parameters on the SB with an old Webbox
> and a RS485 Piggyback card.
>
> The manuals I found online are showing a slightly different set of
> parameters than what I am seeing in real life. For instance, there is no
> "country standard" parameter on the SB. And when I make the recommended
> changes to the parameters that do match up with the manuals, the value
> ranges on the SB are much tighter so it does not let me enter negative
> numbers as the manuals are wanting me to set for frequency shifting to work
> well. I am not in the mood to torch the three Discover 7.4s attached to the
> SI6048.
>
> Makes me think there is a firmware update but SMA's website returned
> nothing. It is currently running BFR 2.72 and SRR 2.72. The SB is from 2009.
>
> Any thoughts on an old (but newer) firmware? Is it even possible to update
> the firmware on this dinosaur?
>
> While I am at it, can any one explain the difference between "PvOnly" and
> "Gen" for setting 231.05 ExtSrc on the SI6048?  The manual is lacking
> reassuring details.
>
> Thanks for entertaining my sadomasochism.
>
> Aloha,
> Lou Russo
> Spree Solar Systems LLC
> C-34322
>
> _______________________________________________
> List sponsored by Redwood Alliance
>
> Pay optional member dues here: http://re-wrenches.org
>
> List Address: RE-wrenches at lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> There are two list archives for searching. When one doesn't work, try the
> other:
> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>
> List rules & etiquette:
> http://www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> http://www.members.re-wrenches.org
>
>

-- 



Mac Lewis

*"Yo solo sé que no sé nada." -Sócrates*
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20250527/f98ef12c/attachment.htm>