Larry, I am having a somewhat similar problem with a recently installed IG5100. I have it installed in conjunction with an Outback battery based system for AC coupling. We have it set up to divert its loads to an electric ice melter and then to a large electric heater as the battery voltages climb. A third relay cuts the array power between the Fronius and the AC panel if the battery voltage continues to climb to unsafe levels.
When we have heavy sunshine and low house loads (second home) and the array output climbs above 3000 or so watts, we continually get a "State 108" code and shut down cycles each time a relay trips on a diversion load. I have worked with both Outback and Fronius (who have been great!) but at this point we are all baffled. I think my next step, especially after reading the above post is to replace the Fronius. Then as a last resort swap the IG5100 out to a couple of SMA 3000US's (a 6000US does not configure well with the 28 evergreens). Any input from you guys would be greatly appreciated! Mark Dickson Oasis Montana Inc. _____ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of William Miller Sent: Sunday, April 19, 2009 7:59 PM To: RE-wrenches Subject: Re: [RE-wrenches] Fronius IG4000 problem Larry: We've installed about 20 IG/LV series inverters. Some failures required only replacement of GF cards, most required replacement inverters. We've had several DOA when new, one was replaced by Fronius with a rebuild even when we warned in writing that we would not accept a rebuild (it had multiple KOs pulled in the chassis -- just not acceptable). As of right now, we have 7 in non-operational status awaiting replacement. No kidding. There maybe be one or two that have not failed, but this is offset by those that have failed multiple times. The biggest failure rate is of the 6 LV4550s on an exterior north wall 2 blocks from the beach (http://millersolar.com/Portfolio/Commercial/Voler/voler.html). These have been replaced three or four times each and are coming out as soon as we finalize the paperwork, with 3 10K Plus series inverters going in. This will require extensive rework, but we are being paid for our time. The Fronius staff has been very nice, but pretty slow to respond. I hate to report bad reviews to this forum, but it is what it is. William Miller At 02:51 PM 4/19/2009, you wrote: William, 100% of what quantity? Are there any special conditions that may have contributed? Were they minor problems? Larry
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