[RE-wrenches] Help understanding 690.12/Ul 3741 and Ironridge

[david quattro]

I think for 3741 without RSD devices, the inverter would have to be mounted
within 1 ft of the array.

On Tue, Oct 14, 2025 at 11:01 AM Michael Morningstar via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

>
> Wrenches,
>
> I do not do a lot of rooftop array work and am having trouble
> understanding something related to 690.12 and UL 3741. I have a potential
> client who is building a new permitted home and has plans approved for a
> rooftop array and Sol-Ark/Discover AES battery back up. He has asked me to
> quote the install and after looking at his plans, I noticed an absence of
> MLPE's. I brought this to his attention and he sent me XR FLUSH MOUNT UL
> 3741 PV HAZARD CONTROL INSTALLATION ADDENDUM. His interpretation is that
> Ironridge's racking system negates the need for MLPE's, or that the racking
> is an alternative to using MLPE's. I'm just not seeing it. Am I missing
> something or?
>
> Thanks,
> Michael
>
> --
>
> Michael Morningstar
>
>
> Morningstar Electric Inc
>
> PO Box 1494
>
> Mount Shasta, CA 96067
>
> 530-921-0560
>
> CSLB 1116835
>
> mjmorningstar at gmail.com
>
>
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