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I would check to see if the home owner has added any loads to those circuits. The system status screen does show the loads being used . <div><br></div><div>I have noticed the fluctuation of the AC1 watts and the load watts also . I have a 1 KW PV array and a 2.5 KW wind turbine running through a XW6048. The wind turbine fluctuates naturally anyway so I haven't been overly concerned. You will also have to figure for battery charging loses as the charge control is floating the batteries.</div><div><br></div><div>Aside from a replacing a smoked board in the XW 6048 a few months after installing, I have been happy with it. It is a big improvement over the SW series inverters it replaced. Being able to swap out boards without removing it from the wall and sending to a repair center is a relief.</div><div>Though it would be nice not to have to repair anything in the first place. </div><div><br></div><div>Jon</div><div><br></div><div>Jon Haeme Innovations </div><div>NABCEP certified solar PV installer # 102503-19</div><div>Kempton, IL</div><div><br></div><div> <br><div><div>On Nov 28, 2008, at 5:48 PM, Peter Parrish wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"> <div class="Section1"><p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">Good point. The loads are fairly small, totaling about 270 W. The security system, a medical oxygen pump, telephone system, a portion of the basement lighting; totaling about 270 W. That’s why I said “in excess of 3.0 kW”. I expect 3.2-3.4 kW total production at local noon, perhaps less this time of year (the array is a flush mount on a 5:12 roof; dead South). Charge control does show the full amount. I am less concerned, at least at this point about the top end AC sell power; I just want the system to settle down and produce 3.0 kW+ at Noon this time of year.</span></font></p><div><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black"> </span></font><br class="khtml-block-placeholder"></div><p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">- Peter </span></font></p> <div><p><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family: Arial;color:navy">Peter T. Parrish, President<br> California Solar Engineering, Inc.<br> 820 Cynthia Ave., Los Angeles, CA 90065<br> Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885<br> CA Lic. 854779, NABCEP Cert. 031806-26<br> <a href="mailto:peter.parrish@calsolareng.com">peter.parrish@calsolareng.com</a></span></font><font size="2" color="blue" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:blue"> </span></font></p> </div> <div> <div class="MsoNormal" align="center" style="text-align:center"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> <hr size="2" width="100%" align="center" tabindex="-1"> </span></font></div><p class="MsoNormal"><b><font size="2" face="Tahoma"><span style="font-size:10.0pt; font-family:Tahoma;font-weight:bold">From:</span></font></b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:Tahoma"> re-wrenches-bounces@lists.re-wrenches.org [<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>] <b><span style="font-weight: bold">On Behalf Of </span></b>Jon Haeme<br> <b><span style="font-weight:bold">Sent:</span></b> Friday, November 28, 2008 10:59 AM<br> <b><span style="font-weight:bold">To:</span></b> RE-wrenches<br> <b><span style="font-weight:bold">Subject:</span></b> Re: [RE-wrenches] Problems with the Xantrex XW6048</span></font></p> </div><div><font size="3" face="Times New Roman"><span style="font-size: 12.0pt"> </span></font><br class="khtml-block-placeholder"></div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt">What are the loads on the sub-panel being backed up by this system ? Any power being used on that sub-panel would not show up on the screen showing power being sold to the grid . Does your charge control show the full rated output from the array ? </span></font></p> <div><div><font size="3" face="Times New Roman"><span style="font-size: 12.0pt"> </span></font><br class="khtml-block-placeholder"></div> </div> <div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt">Jon </span></font></p> </div> <div><div><font size="3" face="Times New Roman"><span style="font-size: 12.0pt"> </span></font><br class="khtml-block-placeholder"></div> </div> <div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt">Jon Haeme Innovations</span></font></p> </div> <div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt">NABCEP certified installer #102503-19</span></font></p> </div> <div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt">Kempton, IL</span></font></p> </div> <div><div><font size="3" face="Times New Roman"><span style="font-size: 12.0pt"> </span></font><br class="khtml-block-placeholder"></div> </div> <div><div><font size="3" face="Times New Roman"><span style="font-size: 12.0pt"> </span></font><br class="khtml-block-placeholder"></div> <div> <div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt">On Nov 28, 2008, at 12:22 PM, Peter Parrish wrote:</span></font></p> </div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt"><br> <br> </span></font></p> <div><p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">I was hoping that I would not have to post the message, but I have been unable to sort this problem on my own, and I am attempting to gather information and advice from this august body.</span></font></p> <div><div><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black"> </span></font><br class="khtml-block-placeholder"></div> </div><p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">We install about two grid-tied battery backup systems a year in the Los Angeles basin and will probably continue to do so at this rate or greater for the foreseeable future. I might add, that it is difficult for us to support these installs and sales because of the added complexity of the systems and the extra knowledge and terminology we have to master. Those of you for whom the off-grid market is your primary market, know this stuff backwards and forwards.</span></font></p> <div><div><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black"> </span></font><br class="khtml-block-placeholder"></div> </div><p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">Having said that, the information I am looking for is any experiences and advice that the wrenches may have and are willing to share with me about the Xantrex 6048 (or similar) systems.</span></font></p> <div><div><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black"> </span></font><br class="khtml-block-placeholder"></div> </div><p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">We purchased a XW6048 with two MPPT60-150 charge controllers. We also have a System Control Panel and all four boxes are wired up using Cat5+ Ethernet cables (and terminations). The rest of the system consists of 30ea Sharp 142W modules and 8ea 8A8D 12V/225Ah batteries. The PV modules are configured as six strings of five each and the batteries are configured as two strings of four each. The module strings are combined using fusible combiners of three strings each and fed into the charge controllers separately. The batteries are hard wired using 2/0 cable within the strings and 4/0 cable after combining. We are using SS bolts/washers/nuts on lead terminals. The XW system and batteries are located in a fully furnished basement in an air-conditioned home in Los Angeles (i.e. the temperature in the basement varies no more than 65F to 80F.</span></font></p> <div><div><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black"> </span></font><br class="khtml-block-placeholder"></div> </div><p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">Here’s the problem: I monitor the system around local noon on a sunny day, and expect to see the system producing in excess of 3.0 kW, with the batteries fully charged. Here’s what we see: the system is in sell mode and he output power goes through an oscillation from about 2.15 kW to 2.90 kW and back down again. The period of the oscillation is ~5 secs on the rise and ~2 secs on the fall.</span></font></p> <div><div><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black"> </span></font><br class="khtml-block-placeholder"></div> </div><p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">In consultation Xantrex, here is what we have done:</span></font></p><p class="MsoNormal" style="margin-left:.5in;text-indent:-.25in"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">(1)</span></font><font size="1" color="black"><span style="font-size:7.0pt;color:black"> </span></font><font color="black"><span style="color:black">Fiddled with the GS voltage. Currently it is 53.0 V</span></font></p><p class="MsoNormal" style="margin-left:.5in;text-indent:-.25in"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">(2)</span></font><font size="1" color="black"><span style="font-size:7.0pt;color:black"> </span></font><font color="black"><span style="color:black">Upgraded the firmware to Rev. 1.03.00</span></font></p><p class="MsoNormal" style="margin-left:.5in;text-indent:-.25in"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">(3)</span></font><font size="1" color="black"><span style="font-size:7.0pt;color:black"> </span></font><font color="black"><span style="color:black">Fiddled with the max sell current, now 17.5 A</span></font></p><p class="MsoNormal" style="margin-left:.5in;text-indent:-.25in"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">(4)</span></font><font size="1" color="black"><span style="font-size:7.0pt;color:black"> </span></font><font color="black"><span style="color:black">Fiddled with 2-stage vs 3-stage charge cycles. 3-stage on charge controller and 2-stage on inverter/charger</span></font></p><p class="MsoNormal" style="margin-left:.5in;text-indent:-.25in"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">(5)</span></font><font size="1" color="black"><span style="font-size:7.0pt;color:black"> </span></font><font color="black"><span style="color:black">Several other tweaks of no consequence</span></font></p> <div><div><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black"> </span></font><br class="khtml-block-placeholder"></div> </div><p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">We have made a total of six trips to this customer after commissioning the system, each time with a different set of suggested tweaks courtesy of four different members of the technical support staff. One of the trips was solely for the purpose of the firmware upgrade. All in all, I have been working the problem now for over four months.</span></font></p> <div><div><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black"> </span></font><br class="khtml-block-placeholder"></div> </div><p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">At this point in time, I have been unable to reach a live tech support person after four tries spread out over two weeks. About five weeks ago, one of the tech support individuals commented that this oscillation in output power was a known phenomenon, but this was the same individual that thought the problem would be fixed with the firmware upgrade. I’m at my wits end. Leaving messages is a waste of my time. </span></font></p> <div><div><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black"> </span></font><br class="khtml-block-placeholder"></div> </div><p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">I apologize in advance for the long narration, but I was hoping to get all the facts out there at once and minimize the amount of Q&As.</span></font></p> <div><div><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black"> </span></font><br class="khtml-block-placeholder"></div> </div><p class="MsoNormal" style="margin-left:.5in;text-indent:-.25in"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">(1)</span></font><font size="1" color="black"><span style="font-size:7.0pt;color:black"> </span></font><font color="black"><span style="color:black">Has anyone seen this phenomenon in the XW systems?</span></font></p><p class="MsoNormal" style="margin-left:.5in;text-indent:-.25in"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">(2)</span></font><font size="1" color="black"><span style="font-size:7.0pt;color:black"> </span></font><font color="black"><span style="color:black">If so, what was the fix?</span></font></p><p class="MsoNormal" style="margin-left:.5in;text-indent:-.25in"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">(3)</span></font><font size="1" color="black"><span style="font-size:7.0pt;color:black"> </span></font><font color="black"><span style="color:black">What is the knowledge level and responsiveness of Xantrex Tech support on this system? </span></font></p><p class="MsoNormal" style="margin-left:.5in;text-indent:-.25in"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">(4)</span></font><font size="1" color="black"><span style="font-size:7.0pt;color:black"> </span></font><font color="black"><span style="color:black">Is anyone experiencing a general decrease in the quality of Tech Support at Xantrex?</span></font></p><p class="MsoNormal" style="margin-left:.5in;text-indent:-.25in"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">(5)</span></font><font size="1" color="black"><span style="font-size:7.0pt;color:black"> </span></font><font color="black"><span style="color:black">To whom at Xantrex should I escalate this problem I am having? In specific, I have spoken on two occasions with Erica Yedid, who I understand is in charge of post-sales tech support for the SW system.</span></font></p> <div><div><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black"> </span></font><br class="khtml-block-placeholder"></div> </div><p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;color:black">- Peter</span></font></p> <div><p><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family: Arial;color:navy">Peter T. Parrish, Ph.D., President<br> California Solar Engineering, Inc.<br> 820 Cynthia Ave., Los Angeles, CA 90065<br> Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885<br> CA Lic. 854779, NABCEP Cert. 031806-26<br> <a href="mailto:peter.parrish@calsolareng.com">peter.parrish@calsolareng.com</a></span></font><font size="2" color="blue" face="Arial"><span style="font-size:10.0pt;font-family:Arial; color:blue"> </span></font></p> </div> </div> <div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt">_______________________________________________</span></font></p> </div> <div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt">List sponsored by Home Power magazine</span></font></p> </div> <div style="min-height: 14px"><div><font size="3" face="Times New Roman"><span style="font-size: 12.0pt"> </span></font><br class="khtml-block-placeholder"></div> </div> <div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt">List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a></span></font></p> </div> <div style="min-height: 14px"><div><font size="3" face="Times New Roman"><span style="font-size: 12.0pt"> </span></font><br class="khtml-block-placeholder"></div> </div> <div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt">Options & settings:</span></font></p> </div> <div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt"><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a></span></font></p> </div> <div style="min-height: 14px"><div><font size="3" face="Times New Roman"><span style="font-size: 12.0pt"> </span></font><br class="khtml-block-placeholder"></div> </div> <div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt">List-Archive: <a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a></span></font></p> </div> <div style="min-height: 14px"><div><font size="3" face="Times New Roman"><span style="font-size: 12.0pt"> </span></font><br class="khtml-block-placeholder"></div> </div> <div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt">List rules & etiquette:</span></font></p> </div> <div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt">www.re-wrenches.org/etiquette.htm</span></font></p> </div> <div style="min-height: 14px"><div><font size="3" face="Times New Roman"><span style="font-size: 12.0pt"> </span></font><br class="khtml-block-placeholder"></div> </div> <div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt">Check out participant bios:</span></font></p> </div> <div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt">www.members.re-wrenches.org</span></font></p> </div> <div style="min-height: 14px"><div><font size="3" face="Times New Roman"><span style="font-size: 12.0pt"> </span></font><br class="khtml-block-placeholder"></div> </div> </div><div><font size="3" face="Times New Roman"><span style="font-size: 12.0pt"> </span></font><br class="khtml-block-placeholder"></div> </div> </div><div style="margin-top: 0px; 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