Hi Daniel, You should patent that magic box idea. Better yet, patent the J-box with an embedded addressable semiconductor switch: Permissive signal from the inverter = switch closed; no signal from the inverter = switch open. Bob's your uncle. Touch-safe PV modules without undue cost or complexity. (That was the magic box I was hoping for but did not see.)
I am also concerned about the cost impact of 690.12. On the one hand, we have all these great SunShot initiatives to drive down the cost of solar. On the other hand, we have these new Code requirements that are driving a cost back into the BOS. As a result, it sometimes feels like the one hand doesn't know what the other hand is doing. (That's part of what makes life on the solarcoaster so exciting! ;-) BTW: I ran into one of your customers (virtually)—the one with a 12 kW ground-mounted residential system in Yellow Springs, Ohio—on a coffee nerd forum. I forget how the PV system came up, but the guy clearly has good taste in espresso equipment and PV installers. Keep up the good work! Best regards, David Brearley Senior Technical Editor, SolarPro magazine NABCEP Certified PV Installation Professional david.brear...@solarprofessional.com Direct: 541.261.6545 Check out this AMAZING music video tribute to SolarPro: http://bit.ly/1qfMCCh On Oct 29, 2014, at 2:45 PM, re-wrenches-requ...@lists.re-wrenches.org wrote: > > From: "Daniel Young" <dyo...@dovetailsolar.com> > Subject: Re: [RE-wrenches] SPI 2014 > Date: October 29, 2014 2:24:09 PM CDT > To: "'RE-wrenches'" <re-wrenches@lists.re-wrenches.org> > Reply-To: RE-wrenches <re-wrenches@lists.re-wrenches.org> > > > Thanks for the response David, this is what I was kind of expecting. > > I was hoping for some sort of “magic box” that attached to the first, and > last module in the string, and would shut the string down if it lost signal > from the inverter. Similar to how solar edge works, but with only 1-2 > units/string. > > I like Solar Edge, but we try very hard to offer US made equipment as our > primary offering. Right now it seems that 690.12 is just increasing the US > made premium, to the point where I don’t imagine US inverters will be even 5% > of our residential installation base next year when 2014 NEC hits the > majority of our jurisdictions. Makes me sad. > > With Regards, > > Daniel Young, > NABCEP Certified PV Installation ProfessionalTM: Cert #031508-90 > NABCEP Certified Solar Heating InstallerTM: Cert #SH031409-13 >
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