Dave, My first thought would be a small nick in wire insulation going to ground, causing the fuse to fail over time. We had a similar situation with a much larger system where the culprit was hard to notice…
Best regards, Lloyd Lloyd Hoffstatter Sunstruck Consulting Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows From: Dave Tedeyan<mailto:[email protected]> Sent: Monday, November 1, 2021 4:26 PM To: RE-wrenches<mailto:[email protected]> Subject: [RE-wrenches] SolarEdge inverter blowing fuses Hi All, I am servicing a system that keeps blowing fuses on the AC side, although it appears that everything is sized correctly. It is a SolarEdge SE11400A-US inverter. Max continuous output current is 47.5A x 1.25 = 59.4A. There is a GE TG3222R 60A AC disconnect, and it is wired up with #6 THHN wire. The terminals were tight and there was no evidence of arcing or burning in the past. This is indoors, and not exposed to sunlight. No extra conductors are in the conduit. But they say that they need to replace a fuse roughly once per month. Has anyone seen this before? Could there be some kind of fault in the inverter itself that occasionally induces extra current? Is there any way to tweak the settings so that it actually produces a bit more than 11.4kw? I appreciate your thoughts. Cheers, Dave -- [Logo]<https://www.sungineersolar.com/> Dave Tedeyan, P.E. Owner | Sungineer Solar p: he | him | his a: 1653 Slaterville Rd. | Ithaca, NY 14850 w: www.sungineersolar.com<http://www.sungineersolar.com/> c: (607) 288-2898
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