[RE-wrenches] Multiple inverters

[August Goers]

Hi William -

In this case, it is helpful to look forward to the 2017 NEC for guidance:

[image: 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>
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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