Good point about the neutral ! Go thru the panel/ light circuits and re-torque. Set up the combox to log L1 and L2. --Dave
On Mon, 13 Aug 2018 09:04:37 -0400, Drake <[email protected]> wrote: > This problem might be due to a neutral connection > problem in the electrical system. Loose neutral > connections can put 120 V loads in series. It > puts loads on both line 1 an line 2 in series for > 240 V. The high resistance load (the one with the low draw) gets high > voltage. > > > At 06:23 PM 8/11/2018, you 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 > > _______________________________________________ > 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 _______________________________________________ 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
