[RE-wrenches] Multiple inverters

[Christopher Warfel]

We just did this, and I think as long as each disconnecting means refers 
to the other multiple sources and their location, and the directory 
refers these multiple sources, you are compliant with NEC2017.

I guess I will find out.....

Chris



On 2/25/2019 12:07 PM, August Goers wrote:
> Hi William -
>
> In this case, it is helpful to look forward to the 2017 NEC for guidance:
>
> image.png
>
> I believe it's perfectly fine to have multiple inverter breakers in 
> your main.
>
> August
> Luminalt
>
>
> On Mon, Feb 25, 2019 at 8:42 AM William Miller 
> <william at millersolar.com <mailto:william at millersolar.com>> wrote:
>
>     Friends:
>
>     I have an NEC code question on an upcoming project.  It is a home
>     that has an existing 8 kW ground-mounted grid-tied system.  The
>     owner wants to add another 10 kW of grid-tied PV.  My question is
>     about 705.12, point of connection.  Specifically section (D)(1).
>     That section states:
>
>     /The source interconnection of one or more inverters installed in
>     one system shall be made at a dedicated circuit breaker or fusible
>     disconnecting means./
>
>     So if there are going to be two inverters on premise, do the
>     outputs have to be aggregated to connect via one circuit breaker? 
>     This might be difficult to do as the exiting inverter is connected
>     via a different sub-panel than the one that is planned to receive
>     the new inverter output.
>
>     This article
>     <https://iaeimagazine.org/magazine/2014/01/16/load-side-pv-connections/>
>     addresses the question.
>
>     I would be very grateful if any of you can share any experience
>     you might have in interpreting this section of the code.
>
>     Thanks in advance.
>
>     William
>
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-- 
             Christopher Warfel
                      ENTECH Engineering, Inc.
PO Box 871, Block Island, RI 02807
                                 401-466-8978
<http://entech-engineering.com>


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