here for the sunshine shenanigans
Author: derek the solarboi
I've worked in solar since 2014, working everything from install, service, and management. I have a passion for sharing how things work and what people can expect from their systems as they age and need service.
The general understanding in the solar industry is that it’s impossible to curve trace through module-level rapid shutdown devices, but with the right equipment, it’s 100% possible.
Leave a CommentWe’ll sometimes get the question, “Can I use Enphase with UL 3741,” or “why isn’t SolarEdge listed on your website?”
They are perfectly good questions — SolarEdge themselves have touted being the first to UL 3741 compliance, since they were listed via Intertek in 2021, and Enphase got certified by UL around the same time. Just recently in May of 2025, Generac listed their inverter to UL 3741 compliance through Intertek. So why aren’t these inverters or systems listed on the website?
Read more at The 3741 Reference…
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Reuters published a story yesterday that seems alarming on its face — Chinese manufacturers may be putting secret communication devices in our solar inverters. But it’s not that simple.
Leave a CommentThere are now dozens of solar structures, commonly referred to as racking, that are listed as PV Hazard Control Systems (PVHCS) under UL 3741. As time goes on, we’re seeing some differences in how listing bodies allow structures to be listed.
Continue reading on The 3741 Reference…
Leave a CommentLet’s see how this inverter is doing five months later, and see what the new “Device Settings” feature from Fronius is all about.
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This is not how I’d expect an optimizer system to work, at least based on how it’s advertised.
Leave a CommentI’ve had a merch link in the menu of this here website for a long time now, but there was never much to see there, and the types of products available there were pretty limited. That’s changing!
Leave a CommentTerry Ko from PV Circonomy posted a video of the full process from beginning to end of their panel recycling machine. They say they can recycle 99% of the components of the panel. I’m a sucker for this kind of video, go watch it.
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