Travis. Is this the UL1741 PCS CRD (usually cross listed with UL3141 listing) or is this a different listing that they are looking for. I was pretty sure that the SolArk's all have the UL1741PCS CRD/UL3141, and of course the MID is built into the inverter already. But maybe it's a different one.
For California, they have an interesting issue for the open loop response time for the PCS CRD listing -- you only need less than 10 second response time for net billing systems, but less than 2 second response time for zero export systems, which has been a harder target for a number of inverters to hit (many are coming in at 3 to 4 seconds for one of the step tests). Ironically one of the main reasons to do a zero export system is because there is already a grandfathered net metered system on site which can export, but they want the new system to have a very fast response time to never export... I calculated that the inadvertent export could maybe cost them a dollar or two a year worse case) Zeke As of July, New York State requires CRD Multimode compliance documentation for any MID devices. Sol-Ark does not yet have their paperwork. Does anyone have a recommendation for an ATS that I can install upstream of the Sol-Ark Inverters to satisfy this requirement? It feels like all I "need" is a simple contactor that will open when the grid goes down, but I don't know who makes a simple device like that which is also UL Listed. -Travis -- Travis Knipple Senior Engineer Hudson Solar Solutions LLC Rhinebeck, NY 12572 518-539-8040 x408 | [email protected] -- Zeke Yewdall PV Engineer NABCEP #031508-89 [email protected] 303-523-3592
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