If you read some of the proposed changes for the 2017 NEC, it is looking life there will be no problem replacing isolated inverters with non-isolated versions. In fact the proposed wording seems to allow either USE, or PV wire to be used with non-isolated inverters explicitly going forward. It made me feel better about doing recent replacements. I'm having more trouble with the TL inverters and AFCI issues on older systems, however.
-----Original Message----- From: "Gary at Santa Ynez Valley Solar" <[email protected]> Sent: 7/21/2016 21:43 To: "[email protected]" <[email protected]> Subject: [RE-wrenches] Replacing grounded inverters We are all facing having to replace the old transformer based inverters when they run out. Really difficult to find replacements. Against code to replace with transformer less ones. I wonder if a DC/DC transformer could be installed just ahead of the transformer less inverter for isolation purposes? Not clear on the concept. Gary Gary Gordon cid:[email protected] <http://www.syvsolar.com/> www.SYVSolar.com PO Box 688 Santa Ynez, CA 93460 805 688-1213 NABCEP Certified Installer CA Licensed Solar Contractor
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