Friends: I have done this once to a two Radian system. Lones told me this is straightforward but not supported. I bolted in the modules and updated the firmware. Set module control to Both. It’s been a while so I hope I am not forgetting any steps.
William Miller Miller Solar.com 805-438-5600 www.millersolar.com On Mon, Nov 3, 2025 at 6:51 PM Jay via RE-wrenches < [email protected]> wrote: > I don’t remember hearing you can’t upgrade. You could ask zonna what the > board part numbers are between the 4 and the 8. > I know you can turn an 8 into a 4. > > But the power modules would need to be same rev. > > And if it’s a 4048 not an A, I think it’s about impossible to find > anything to work on the non A variants > > Good luck > > Jay > > > > > On Nov 3, 2025, at 7:39 PM, Kirk Herander via RE-wrenches < > [email protected]> wrote: > > > Dana, > Interesting. The procedure as I recall to input the installer menu code is > in the last quick start guide they published, along with the generic > password itself. it's needed to turn on AC coupling, maybe also for your > upgrade. > > And I was told 3 years ago by OB that you can't just add a 4kw inverter > module to ramp up a 4k to an 8k. As a result I upgraded my customer from a > 4048 to an 8048. I still have the 4048 you can pull the module out of. I'll > sell the whole inverter cheap. > > On Mon, Nov 3, 2025 at 2:25 PM Dana Orzel via RE-wrenches < > [email protected]> wrote: > >> There is a procedure along with a tech code which I have, to get into the >> installer menu in a radian. Does anybody know the steps to get into the >> installer menu? >> Thank you in advance as always >> Dana Orzel >> C: 208.721.7003 >> E- [email protected] >> _______________________________________________ >> 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 >> >> > > -- > > > *Kirk Herander / **[email protected] <[email protected]>* > > *Owner|Principal, VT Solar, LLC* > > *Celebrating our 34st Anniversary 1991-2025!!* > > dba Vermont Solar Engineering > > 802.559.1225 > _______________________________________________ > 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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