I can not determine if RSD is still required for PV mounted on non-enclosed structures if the DC conductors are brought into a dwelling where the inverter is located? This is an important consideration when installing batteries in cold country.
Howie Michaelson On Wed, Nov 19, 2025 at 3:06 PM jay via RE-wrenches < [email protected]> wrote: > Hi Zeke, > > you are correct in regards to parking structures. > See the following > 2023 NEC > > 690.12 > exemption #2 > > > On Nov 19, 2025, at 12:40 PM, Zeke Yewdall via RE-wrenches < > [email protected]> wrote: > > Yes, you are right -- even a non occupied garage or shed would be required > to have it if it's not solely for the PV system under exception #1. But I > was thinking of Exception #2: PV equipment and circuits installed on > nonenclosed detached structures including but not limited to parking shade > structures, carports, solar trellises, and similar structures shall not be > required to comply with 690.12. That seems to pretty clearly cover > ground mounts. > > Also we have the exception that conductors originating from arrays not > attached to buildings, that terminate on the exterior of buildings don't > need to be considered as controlled conductors. If they're going into an > inverter inside a building but the PV array is not on the building, does an > external accessible DC disconnect count as ending those conductors, and the > output from the disconnect is no longer a controlled conductor either? > > Zeke > > On Wed, Nov 19, 2025 at 8:24 AM William Miller <[email protected]> > wrote: > >> To paraphrase: If PV circuits are located on or in any structure RSS is >> required. Exception: if the structure’s sole purpose is to house solar >> equipment then RSS is not required. >> >> If your inverter is in a shed and there is one rake in that shed, RSS is >> required. >> >> >> William Miller >> Miller Solar.com >> 805-438-5600 >> www.millersolar.com >> >> >> _______________________________________________ > 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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