[RE-wrenches] MidNite MNSSR-600-SS

[William Miller]

It seems to me the only viable option is to not put the electronics in any
building with other uses. That avoids the requirement (unless that
exception is changing).

A line of pre-fab, stand-alone enclosures might be a direction for any
manufacture or integrator to explore.

William Miller
Miller Solar.com
805-438-5600
www.millersolar.com


On Tue, Jan 27, 2026 at 11:55 AM Sue Stankevitz via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> At this time Midnite Solar does not have a replacement for the string
> level RSD on our roadmap. With the new UL requirement for double redundancy
> failsafe requiring substantial design change the decision was made to no
> longer push forward in that market.
>
> Sue Stankevitz
>
> MidNite Solar, Inc.
>
> (360) 403-7207 (XT122)
>
> -----Original Message-----
> From: RE-wrenches <re-wrenches-bounces at lists.re-wrenches.org> On Behalf
> Of Brett Stigile via RE-wrenches
> Sent: Monday, January 26, 2026 10:42 PM
> To: re-wrenches at lists.re-wrenches.org
> Cc: Brett Stigile <brett at oregonsunwrangler.com>
> Subject: [RE-wrenches] MidNite MNSSR-600-SS
>
> I was hoping to do an up coming job with MidNite Solar (MNSSR-600SS)
> string level shut down.  However, I just learned that the product has been
> discontinued.  I'm moving forward with AP smart because I don't have time
> to mess with it.
>
> However, I have several questions.
>
> Will a similar new product take its place?
>
> If a string level shut down device is available again will that satisfy
> 690.12 code requirements for roof mounted residential under NEC 2023 or
> NEC 2026 on it's own?  Or does UL3741 come into play?
>
> For example, would a MidNite AIO with Unirac NXT racking (which is
> UL3741) with string level shut down and of course wiring everything nice
> and neat with appropriate listed wire management comply with NEC under
> 2023 or 2026 code?
>
> I'm just trying to figure out if string level shut down is a viable option
> with new code cycles or if it is a waste of time.
>
> thank you
>
> --
> Brett Stigile
> Owner/Renewable Energy Electrician
> 503-317-7950
> brett at oregonsunwrangler.com
>
> Oregon Sun Wrangler LLC
> CCB: 240661
> License: 66LRT
> NABCEP PV Installation Professional
> certification: PV 100414-008123
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