[RE-wrenches] Stacking SW Series

[Steve Higgins]

Yeah, there is a reason it was called "Magic Stacking"... If the load were
simple resistive loads and remained light, it generally wasn't an issue...
but if the loads were inductive and heavy, that would cause phase drift and
lead to all kinds of problems.

Magic stacking is generally not a permanent solution, but in a pinch, it
could work.


*Steve Higgins* *⋅* *Technical Services Manager*
*t* +1.902.597.4020   *m* +1.206.790.5840
*f* +1.902.597.8447   *e* steve at surrette.com
------------------------------
CONFIDENTIALITY: The information transmitted herein is intended only for
the addressee and may contain confidential, proprietary and/or privileged
material. Any unauthorized review, distribution or other use of or the
taking of any action in reliance upon this information is prohibited. If
you receive this email in error, please contact the sender and delete or
destroy this message and all copies.
------------------------------




On Wed, Jul 15, 2026 at 7:25 AM William Miller via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> My experience with SW inverters not synced with a cable is that they would
> drift to 180 degrees out of sync over a period of about 20 minutes. I could
> measure phase to phase and see it go from ~240VAC to 0VAC in that time
> frame.  In another 20 minutes or so the volts would creep back up to 240
> again.
>
>
> William Miller
> Miller Solar.com
> 805-438-5600
> www.millersolar.com
>
> On Wed, Jul 15, 2026 at 6:57 AM
>
>>
>>> "Magic Stacking" was when you wired them in 120/240 and used a
>>> generator or grid power to sync the output waveforms.  That waveform would
>>> stay synced for quite some time, days if not weeks, as long as you didn't
>>> load them more than 75%. <http://www.members.re-wrenches.org>
>>>
>> _______________________________________________
> 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
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20260715/48f8827f/attachment.htm>