(This is my first MidNite forum post. I'm happy to be here.)
Does Midnite have or is MidNite pursuing the new UL 3141 listing for MN15-12KW-AIO?
(FYI, the UL 3141 standard supports connecting more PV or ESS to a subpanel than otherwise permitted, on condition that the PV / ESS output is controlled to prevent busbar overload.)
At his time I believe the only listing available is the CRD for PCS, I do not believe U has finalized the amendments to UL3141 for PCS yet. We will take a look at it though as we do have the CTs and can certainly use them to limit current. UL is currently targeting late 2025 or early 2026 for this.
I will pass this info on to engineering now also
I did just hear back and it looks like we will have the CRD-PCS listing in a couple weeks.
Big thanks for the feedback.
I assume MidNite will pursue the UL3141 listing as soon as it's finalized.
In the meantime, I'll ask my local AHJ (City of Oakland, California) if they're open to accepting the CRD-PCS listing (any general feedback on AHJ acceptance of CRDs would be appreciated).
FWIW Mike, Xcel energy in Colorado is now requiring either UL3141 (they don't realize it doesn't exist quite yet), or the PCS CRD for UL1741. UL1741SB is not sufficient to interconnect to their grid for battery inverters, at least in the system I have going through their process that got stalled at that step. So, good that the PCS CRD is coming soon.
Thanks a lot DarkForestSolar, the context is helpful.
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BTW, I assume the UL-1741 CRD (and, later, the UL-3141 listing) will be applicable whether the AIO is used with split phase (one unit) or three phase (three units). ...I'd appreciate confirmation on this.