I just had four defective 390-watt 72-cell modules that were bad out of the box. I immediately thought it was an optimizer issue because in eight years, I've never had four modules go bad, let alone four from one box.
My distributor put me in contact with Q-Cells and he was great taking info just today so we'll see what the warranty process looks like. His info is Ben Kuttesch [email protected] <mailto:[email protected]> 615-438-4805 I hope this is not a precursor to lots of in-field warranty work for diodes that fail prematurely.because unlike SolarEdge and Enphase there is no "truck roll" reimbursement from what I can tell. Scot Arey Solar CenTex From: RE-wrenches <[email protected]> On Behalf Of Jeff Wongstrom Sent: Friday, November 6, 2020 11:38 AM To: RE-wrenches <[email protected]> Subject: Re: [RE-wrenches] Bad Diodes in QCells? Adam, I had a similar experience with four QCell modules on two different jobs. Underperforming modules with low voltages at installation. Q.Peak Duo 325. Replaced under QCell warranty by credit to distributor. No labor compensation. Jeff Jeff Wongstrom NABCEP Certified PV Installer Licensed MT Residential Electrician 406.291.3416 thirstylakesolar.com <http://www.thirstylakesolar.com/> On Nov 5, 2020, at 9:26 PM, AE Solar <[email protected] <mailto:[email protected]> > wrote: Wrenchers, Wondering if anyone has had any experience with bad diodes in QCell panels. Two of our projects this summer had panels that were putting out half of their rated voltage. At first it seemed like it was a defect from the factory, and it was caught upon commissioning the system, but I'm now seeing that another panel has gone bad about two months after install. I've spoken with a few distributors and they said they haven't heard anything about this being a pattern. I'm in the RMA process with QCell, and don't feel like I'm getting complete transparency from them. So far we have 8 defective panels out of 300. It was in two different projects that were months apart. I'm not sure if they were from the same shipment or not. All of them were Q.PEAK DUO 400 watt panels. Interested to know if anyone else is having similar experiences? Thanks for any thoughts. Adam Adam Katzman Autonomous Energies PO Box 1245 Kingston, NY 12402 www.autonomousenergies.com <http://www.autonomousenergies.com/> (518) 567-1468 _
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