Daniel, No, have not seen this. I would load an SD card into combox and start a logging program to monitor L1 and L2. Since Schneider replaced the inverter control board I am at a loss. Your comments seem logical to me also. What about refrigerator surge? if you still have repair number from Schneider I would see what they say also. Good Luck!
Dave Angelini Offgrid Solar "we go where powerlines don't" http://members.sti.net/offgridsolar/ e-mail [email protected] text 209 813 0060 On Sat, 11 Aug 2018 16:23:49 -0600, Daniel Duffield <[email protected]> wrote: > I am placing this inquiry out to see if anyone else has experienced a > similar experience. > > An electrician friend near Taos, NM, installed a Conext XW+ 6648 inverter > on a large 2nd seasonal (remote stand alone PV supplied) vacation home, > (used less than 10 weeks per year), it has a large 48 VDC AGM battery > (40+kW-Hr) and almost a 7.0 kW PV Array and a back-up LP gen-set. It has a > Xantrex accessories : Com-Box, charge controllers, bat monitor, etc. > The anomaly this system exhibits is that - when the owners are > infrequently present - during each evening, for about 90 seconds - the > 120vac lights get noticebly brighter. After this brief event, the lights > exhibit normal behavior. No lights or appliances are functionally damaged. > It is more of a nuisance than an actual problem. This usually happens > between 9:30 and midnight. The timing seems to be arbitrary - as no known > load either turns on or turns off in conjunction with this event. > Xantrex has been consulted and the inverters firm ware has been upgraded > and they even sent a replacement inverter control board, which after its > replacement nothing changed. > As this is quite late at night and has been happening both in winter and > in summer months, it is not presently believed to be associated with the > PV modules or charge controller. > Conventional wisdom implies, that if there is some significant load was > cycling in the background - the lights would dim - not brighten. I have > never heard of anything like this and was wondering- if any had. There are > no known large capacitive loads on the system. > Any one seen anything similar, I was asked - as I have been doing systems > in New Mexico since 1995 and I guessed it was a well/ water pressure > bladder tank system related issue . . . but the installer has witnessed > this, at night when the water pump and well remained off. ? > > Item 2) some weeks ago, it was noted on this RE-Wrenches thread that some > ballast blocks, 4” x 8” x 16” were starting to suffer decomposition and a > solution was sought, I guessed that this might be due to water seepage and > repeated freezing and thawing. > > Has anyone used an inexpensive masonry sealer painted on the blocks, to > stop water wicking to the concrete ballast blocks? There is very thick > cinder block paint (UGL) for cinder block foundations that would be quite > expensive and polyurethane is very pricey too - I would like to recommend > that works successfully and is economical for existing installations rather > than replacing hundreds of blocks? > > Thanks, > Daniel O. Duffield > NABCEP Certified PV Installation Professional (2005) > NM licensed Commercial Electrical Contractor EE98/ER01 > IEEE member 23 years > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org -- Dave Angelini Offgrid Solar "we go where powerlines don't" http://members.sti.net/offgridsolar/ e-mail [email protected] text 209 813 0060 _______________________________________________ List sponsored by Redwood Alliance List Address: [email protected] Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/[email protected]/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
