Steve pulled that one out of the old timers closet! Had forgotten about “Magic Stack” and the reason it was even a thing!
Firmware issues will not let you stack the SW ‘s as you hope to. Even if you use a hack and get it done it will not be a reliable setup for a customer. On Wed, Jul 15, 2026 at 9:40 AM Steve Higgins via RE-wrenches < [email protected]> wrote: > To make them stack, they both have to have the same firmware. > Unfortunately, the SW5548 and the SW+5548 had very different firmware, and > I don't think you'll be able to connect them up with a SWI/PAR Kit. > > You might be able to make them a "Magic Stack" for 120/240, but once you > lose the generator/grid input, and depending on the loads, the waveforms > will drift out of phase, and you could get a backfeed. > > "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%. > > > *Steve Higgins* *⋅* *Technical Services Manager* > *t* +1.902.597.4020 *m* +1.206.790.5840 > *f* +1.902.597.8447 *e* [email protected] > ------------------------------ > 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 Tue, Jul 14, 2026 at 8:26 PM Ray Walters via RE-wrenches < > [email protected]> wrote: > >> I never liked the original SW5548. It had different firmware and actually >> can't surge as much as an SW4048. The 5548 does have a very heavy >> transformer, so they would be good for a heavy continuous load that didn't >> surge much on startup. They're hard to put up on a wall. >> >> I don't know anything about the SW+, I had switched to Outback back >> then. Did you read in the SW+ manual that it could be stacked with the >> SW? Unless they designed that into it, I'm guessing they wouldn't stack. >> >> Ray Walters >> Remote Solar >> On 7/14/2026 8:01 PM, All Solar via RE-wrenches wrote: >> >> Has anyone tried to stack an SWPlus 5548 with an SW5548? >> I’m trying to make sure, before I try harder to sell the SWplus >> >> >> >> >> Jeremy Rodriguez >> All Solar Inc. >> Penrose CO >> 719-276-4954 >> Established 1998 >> >> On Wed, Jul 8, 2026 at 8:27 AM All Solar <[email protected]> >> wrote: >> >>> Can anyone tell me if it’s possible to stack an SW Series Inverter with >>> an SW Plus Series for 120-240V? >>> What’s Required, if So. >>> >>> Thank You >>> >>> Jeremy Rodriguez >>> All Solar Inc. >>> Penrose CO >>> 719-276-4954 >>> Established 1998 >>> >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> Pay optional member dues here: http://re-wrenches.org >> >> List Address: [email protected] >> >> 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/[email protected]/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 >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> Pay optional member dues here: http://re-wrenches.org >> >> List Address: [email protected] >> >> 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/[email protected]/ >> 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 >> >> _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: [email protected] > > 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/[email protected]/ > 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 > >
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