[RE-wrenches] Tigo TS4-A-F

[jay]

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 <re-wrenches at lists.re-wrenches.org> 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 <william at millersolar.com <mailto:william at millersolar.com>> 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 <http://www.millersolar.com/>
>> 
>> 
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