I've been considering a Fluke 345 for some time http://www.davis.com/catalog/product_view.asp?sku=2000338&pfx= It does data logging of power issues,and is very easy to carry around and work with (basically a clamp on meter with electrodes too) Do you think that would work?
R. Walters r...@solarray.com Solar Engineer On Mar 31, 2010, at 6:10 AM, t...@hughes.net wrote: > I have a company that will rent a Fluke power logger 1735 for ~ $300/ month. > I have been using one to measure just this issue. I found the unit was easy > to use + all the data logged can be downloaded. Logging can be as short as > 1/2 second to 40 hours. Ck out what one can log, it is quite a bit of > information. Plus it is available w/ calibration cert. > Contact me off list if you want to view spread sheet or their contact info. > Sent via BlackBerry by AT&T > > -----Original Message----- > From: penobscotso...@midmaine.com > Date: Tue, 30 Mar 2010 19:31:21 > To: RE-wrenches<re-wrenches@lists.re-wrenches.org> > Subject: Re: [RE-wrenches] Outback Grid Problems > > Hi Ray, > It's very funny this comes up with you now. I have a 3500 watt array > running my home. For years I sold between 10 and 16 kwh per day, > depending on the time of year, on a sunny day. I should mention the > panels are in a south facing field on pole mounts. > Suddenly I was noticing a decrease, substantial, in production. I > checked my programming, OutBack sent me inverter boards to replace, > literally checked and/or replaced everything many, many times with no > satisfaction. Long story short, I had the utility change out the 35 > year old transformer last Friday and on Saturday, a gloriously sunny > but cold day, I made 20.4 kwh, up from what had been only about 5 kwh > per day. That is a record for me. Remember, this is in Maine in March. > My array is 15 years old. > I would suggest you have the utility check the transformer. If it is > old, have them replace it. It made all the difference for me. > > Daryl DeJoy > NABCEP Certified PV installer > Penobscot Solar Design > > > >> HI Ray, >> >> Have you checked the grid voltage to see if there is variation during the >> day which would be enough to kick the inverters out of connection? >> >> Brian Teitelbaum >> AEE Solar >> >> >> >> -----Original Message----- >> From: re-wrenches-boun...@lists.re-wrenches.org >> [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of R Ray >> Walters >> Sent: Tuesday, March 30, 2010 9:43 AM >> To: RE-wrenches >> Subject: [RE-wrenches] Outback Grid Problems >> >> We currently have a Grid Tie system with a pair of Outback inverters that >> are regularly dropping out of sell mode, and letting the arrays spend all >> day charging the battery bank. >> It seems to do this several times a week, and the customer is losing >> substantial production, and gassing the batteries too much. >> It will reset itself the next day, or the customer resets it by turning >> off the inverters manually. >> The system is 24 v, with an old array of 1800 watts running through 2 >> FM60s, and a new array of 2800 watts running through another pair of >> FM60s. >> The battery bank is HUP about 4100 Ah @ 24 v (3 strings of 1375 Ah each) >> Big battery, I know, but the customer is an electrical engineer, who >> wanted maximum storage capacity. >> >> Outback tech support has not resolved the issue, and this has turned into >> several service calls, and customer frustration. >> We've tried running the controllers through the HUB, and also >> independently, and that doesn't make a difference. >> I have numerous Outback GT installs dating back to 2003, and have never >> had a problem like this. >> Any help or advice would as always be greatly appreciated. >> >> Thank you in advance fellow Wrenches, >> >> R. Walters >> r...@solarray.com >> Solar Engineer >> >> >> >> >> _______________________________________________ >> List sponsored by Home Power magazine >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Options & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out participant bios: >> www.members.re-wrenches.org >> >> _______________________________________________ >> List sponsored by Home Power magazine >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Options & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out participant bios: >> www.members.re-wrenches.org >> >> > > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
