I have hit this one a couple of times but not with the equipment you are listing. It turned out to be how the sine wave crossed the X axis and the controls did not like the wave form.
Thanks - Dana Orzel Great Solar Works, Inc www.solarwork.com E - d...@solarwork.com V - 970.626.5253 F - 970.626.4140 C - 970.209.4076 "I'd put my money on solar energy. I hope we don't have to wait 'til oil and coal run out before we tackle that." -Thomas Edison, in conversation with Henry Ford and Harvey Firestone, March 1931 From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Allan Sindelar Sent: Monday, February 09, 2009 11:16 AM To: RE Wrenches Subject: [RE-wrenches] Magnum MS4448AE Compatibility Question Wrenches, We have an unusual problem, and I need to know if anyone else has had this or a related problem, and what to do about it. This concerns a new off-grid residential system, very conventional: 1,800W PV, Midnite E-Panel with Magnum MS4448-AE inverter, MX60, 16 S-460s, installed summer 2008. This existing home is being extensively remodeled, and the home is not yet occupied. A local mechanical contractor installed a new infloor radiant (gypcrete) hydronic heating system using a Netherlands-made (German company) Buderus GB142 high-efficiency boiler. The problem is that the boiler won't start reliably on the inverter. It appears that the hot-surface igniter does not get full AC voltage (it runs on straight 120V AC, but is supplied through the boiler's control circuitry). We tested the igniter by disconnecting it and plugging it straight into inverter AC and it lit right up. The mechanical contractor has tried a replacement Buderus GB142 boiler with the same result. I was told that they brought out a generator and it also failed to ignite on generator AC, but not knowing the generator used or the way it was wired (I believe an extension cord to a portable) I don't put much weight on this data. They also took a Lochinvar Boiler to the site to test the theory that a different manufacturer's boiler might work. The Lochinvar boiler, which uses a different control and a spark ignition rather than a hot surface igniter, worked on site without any problems. I'm looking for solutions. Magnum tech support had not heard of this. Have you? Also, if indeed we have an inverter that is incapable of running this load, how do we make it right to the homeowner and the mechanical contractor? What should be Magnum's obligation? What should be ours? This issue hasn't come up here since the days when the Trace SW mod-sine series was the waveform standard. Thanks, Allan Sindelar <mailto:al...@positiveenergysolar.com> allan_(at)_positiveenergysolar.com NABCEP certified solar PV installer Positive Energy, Inc. 3225A Richards Lane Santa Fe NM 87507 505 424-1112
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