9/13/2023 0 Comments Eg4 batteries![]() ![]() That ALL the components - panels AND panel mounting racks would need to be UL listed as a 'system'. I have come to this position when I was reading up on what is required to put the panels on my house and discovered I could point at some chinese equipment manufacturers tho, where I have drawn a different conclusion.įor Permitting under NEC (national electric code Sep 2019) now widely adopted in the US, it "appears" that all components in the system need to be UL1741 certified. Some examples below are not examples of people being deceptive - but it demonstrates how confusing this topic is. Someone in the thread mentioned UL9540A - this standard is related to run-away lithium battery safety which does not mean it is UL1741 compliant. For example they may try and trick you by quoting a single sub-section of UL to try and convince it is UL compliant when it isn't (at least for my purposes). As I have been at this for months, be careful of web sites saying their stuff is UL certified. If you go look at the scope of UL 1741 on the UL site (links below) you will see what it applies to: which are most of the system components I need for my installation. I looked to see if the IEC62109 was in the NEC2020 but was unable to confirm that it is/was.) (I found documentation from 2004 indicating that they were trying to develop international standards, but no idea if that succeeded. I was hoping I could substitute the IEC for UL. I found out there is a European counterpart called IEC62109 (1)(2) was derived from UL1741 but I have no evidence that NEC2020 accepts this standard. Have been looking into this issue and for off-grid storage, NEC2020 (and earlier) have a UL safety standard 1741 that applies. Scope: I'm working on a permitted install of solar panels, a backup battery, inverter to run some small loads (outdoor lighting) and provide emergency backup power in a grid-down situation. This is a complex topic that can be summarized as: "Does all the equipment need to be UL 1741 certified to pass inspection for the electrical permit? The following comes from my research and I would *love* to find out if I'm not correct, so please use this as a starting point and not the last word. ![]()
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