I should have mentioned that our installation is not a metal roof either. Ours is a flat foam roof with large tilt racked arrays of SunPower modules.
I've spoken with SMA tech support twice on this and got the idea that either I have a real ground fault or that there is some sort of inductance related problem that they don't necessary have a fix for yet. Best, August *From:* [email protected] [mailto: [email protected]] *On Behalf Of *Jeff Irish *Sent:* Tuesday, March 25, 2014 6:34 PM *To:* RE-wrenches *Subject:* Re: [RE-wrenches] Unusual problem with SMA TL inverter on metal roof August, We're seeing multiple inverters with the same error, and not getting the best of answers or support from SMA on fixing the problem so far. And this is not a metal roof; it's PanelClaw on EPDM. Jeff Irish Hudson Solar ------------------------------ *From:* [email protected] [ [email protected]] on behalf of August Goers [ [email protected]] *Sent:* Tuesday, March 25, 2014 8:41 PM *To:* RE-wrenches *Subject:* Re: [RE-wrenches] Unusual problem with SMA TL inverter on metal roof Hi Marco, Did you ever make any progress on this issue? We're having an interesting issue with one of the new Sunny Tri-Power inverters (a 24 kW unit in this case) where we get an error "residual current too high." We've only done a little troubleshooting so far but I don't think we have a ground fault. Best, August Luminalt *From:* [email protected] [mailto: [email protected]] *On Behalf Of *Marco Mangelsdorf *Sent:* Friday, March 14, 2014 9:56 AM *To:* 'RE-wrenches' *Subject:* Re: [RE-wrenches] Unusual problem with SMA TL inverter on metal roof Probably not. *From:* [email protected] [ mailto:[email protected]<[email protected]>] *On Behalf Of *RE Ellison *Sent:* Friday, March 14, 2014 1:24 AM *To:* 'RE-wrenches' *Subject:* Re: [RE-wrenches] Unusual problem with SMA TL inverter on metal roof Is the metal roof grounded? Just a fast thought. bob *From:* [email protected] [ mailto:[email protected]<[email protected]>] *On Behalf Of *Marco Mangelsdorf *Sent:* Thursday, March 13, 2014 10:31 PM *To:* 'RE-wrenches' *Subject:* [RE-wrenches] Unusual problem with SMA TL inverter on metal roof Friends, We have run across an odd technical problem at our commercial install at a laundromat on our island. Attached is the description of the issue from SMA. We don't know much except that we are switch out the TL inverters to the old style US inverters because SMA has no fix for the phantom ground tripping. The issue is beyond our feeble understanding. Any observations to share? Thanks, marco ------------------------------ No virus found in this message. Checked by AVG - www.avg.com Version: 2014.0.4336 / Virus Database: 3722/7186 - Release Date: 03/12/14 ------------------------------ No virus found in this message. Checked by AVG - www.avg.com Version: 2014.0.4336 / Virus Database: 3722/7186 - Release Date: 03/12/14
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