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  • 1.  2026 NEC changes: What's new for solar installers? (Solar Noon Tuesday)

    Silver
    Contributor
    Posted 03-11-2026 10:56 AM

    Each Tuesday at noon (Eastern) solarPVtraining.com hosts a Zoom sessions for students (or anyone, really) interested in solar. Generally discussion focuses on technical questions, problems or troubleshooting - or just what is happening in solar that week.

    This week we take a look at the most recent edition of the National Electrical Code (NEC 2026) and explore what has changed that may impact the design and installation of solar PV systems.



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    Jay Warmke
    Owner
    Solar PV Training LLC
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  • 2.  RE: 2026 NEC changes: What's new for solar installers? (Solar Noon Tuesday)

    Silver
    Contributor
    Posted 03-11-2026 12:13 PM

    Thank you so much for sharing this, Jay!



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    Ella Nielsen
    Membership & Engagement Director
    American Solar Energy Society
    Boulder CO
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  • 3.  RE: 2026 NEC changes: What's new for solar installers? (Solar Noon Tuesday)

    Posted 03-12-2026 08:11 AM

    300.4(c) is kind of gray area because I am not sure if the wording "such as overheating, fire damage, corrosive influences, or water..." are the only scenarios that it will require the replacement of the wiring method. 



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    Baker Makarem
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    Original Message


  • 4.  RE: 2026 NEC changes: What's new for solar installers? (Solar Noon Tuesday)

    Posted 03-12-2026 08:28 AM

    I believe the MC4 compatibility story will eventually come to an end, as Staubli (MC4 manufacturer) does not allow any other brand to connect to their connectors, plus they only allow to use their own tools to build this connectors and other clauses for their warranty including storage. Imagine when buying MC4, you do not know who manufacturer, if they were stored properly and if any product that comes with MC4 was built using manufacturer's tool.

    I have mix feeling with PV connectors as I have seen mix and match that have never failed in almost 10 years, and other properly installed failing in a matter of 2 years. Due to increasingly issues with PV connectors, there is an emerging practice in large scale that is irreversible barrel connections (ultimate problem solver). 



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    Baker Makarem
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