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The Discover AES Rackmount / Slimline system is also “DC ESS” certified. I confirmed with one of their sales engineers that it would maintain UL9540 status with any UL1741 inverter. The BMS communication also seems to support a broad range of inverters - including Victron. I’m designing a...

I’d be more concerned about home insurance over the inspector.

Sure! 1. Their support is super responsive and quite technical. They even suggested how I should design my Victron wiring. 2. 30kWh can fit in one rack and I needed an outdoor rated system (very tight space in my home so difficult to fit indoors while meeting fire code). 3. It wasn’t super...

Yeah, I actually applied for an interconnect last week with my utility (Eversource), with the Victron inverters as I want to charge from / pass-through the grid. They don’t have UL1741 “SB” or even “SA” certification (which Eversource also require), but my application is for a non-export self...

Interesting - curious how you heard the UL certificate isn’t retroactive? A couple of dealers mentioned the certificate would apply to the currently sold Quattro 10kVAs (given the UL certificate doesn’t list the new SKU, but rather the model name). I’ve still been debating holding off until the...

Certainly buy an off-the-shelf UL listed combiner if there exists one that meets your needs. I spoke with my state’s building inspector about a similar project (creating a custom AC combiner box for Victron inverters). It is permissible to create a custom box using UL listed components (e.g...

That’s a really interesting question. My current thinking is to opt out of the Victron ecosystem for the PV portion (for the same reasons you mention) and rely on AC-coupled Fronius inverters. These have all the proper certifications (UL1741SB, IEEE 1547), but important in my case also have...

Agreed here too. Hopefully they see it the same way!!