Yes Matt it was an SW --- On Sat, 8/1/09, Matt Tritt <solar...@charter.net> wrote:
> From: Matt Tritt <solar...@charter.net> > Subject: Re: [RE-wrenches] Magnum inverters (not really a power factor issue) > To: "RE-wrenches" <re-wrenches@lists.re-wrenches.org> > Date: Saturday, August 1, 2009, 10:51 PM > > > > > > > Good point, Darryl. The resting DC volts were only at 51.6 > according to > the Magnum meter, kind of on the low side. I was not able > to measure > any sag on the DC side because there wuz only one of me and > I ain't > Plastic Man. I bet that the inverter you measued the 60 Hz > on the DC > side was an SW, right? They all have an odd ability to > loosen the DC > inverter cables over time because of this harmonic vibe, > especially the > Al lugs they used to use back in the day. I had several > problems with > tripping (no, not that kind) breakers before I changes to > better cable > lugs. > > > > Matt > > > > > > Darryl Thayer wrote: > > Don't know if this will help, but an experiance > of mine on starting a large motor, using a battery and > inverter. The motor would not start, or if it did if would > quit in 10, or 20 min. The battery had capacity to run the > motor for 5 or 6 hrs to 50% DoD yet the inverter would kick > out. I had reason to beleive the output wave form was bad > also. I solved the problem by greatly increasing the > battery size and the cables. I did not change the inverter > at all. > > What I think was happening is the high current draw of the > inverter to serve the load reduced the battery voltage, but > not just the average battery voltage but the 60 cycle peak > voltage drop/ of the battery. The load of the inverter on > the battery is like pulses, my amp clamp shows an AC current > on the battery leads. If I had a scope, I would guess the > inverter is seeing a fluxuating voltage on the battery. My > grandson has a 1 Farad Capacitor in his sterio system, > perhaps this would fix the problem. BoB what do you think? > Darryl > > --- On Sat, 8/1/09, boB Gudgel <b...@midnitesolar.com> > wrote: > > > > From: boB Gudgel <b...@midnitesolar.com> > Subject: Re: [RE-wrenches] Magnum inverters (not really a > power factor issue) > To: "RE-wrenches" <re-wrenches@lists.re-wrenches.org> > Date: Saturday, August 1, 2009, 6:22 PM > Larry Crutcher, Starlight Solar > wrote: > > > Hey Matt, > I sure wish their techie's would get to the bottom of > > > it. I am getting gun-shy about selling Magnum and > they are > about the best available for small 12 volt systems. I have > spend hours trying to solve the problem. My customer is > still not a happy camper. > > > Larry Crutcher > Starlight Solar > (928) 941-1660 > Renewable Energy Products, Service and Installation > > > Can you get someone to look at the voltage and/or > current > going into that pump ?? Scope > ? Meter ? Even a > power factor meter would have both voltage and current > measurements. Some even have a mediocre scope built > in. > A scope AND a meter is best of course. > > Need stats. AC an DC side. AC voltage at > the pump and at the inverter. > > Must have more information. Yes, it ~could~ be > a Magnum inverter issue, but need more information other > than "it doesn't work" > > Does the voltage dip when the pump tries to start ? > What is the maximum Ac and DC current ? Most basic > info for troubleshooting. > > The inverter manufacturer can probably help somewhat if > they have this info. > > Just a suggestion here. > > boB > > > > > > > > > On Aug 1, 2009, at 4:28 PM, Matt Tritt wrote: > > > > I took boB's advice and talked to Magnum > about the > > > > problem. Their take on it? "Hmmm, beats > me!" I might be > paraphrasing, but that's the drift. All in all, I'd > say that > the suggestions from the group are at least as good as the > one's from the manufacturer. > > > > Matt T > > Larry Crutcher, Starlight Solar wrote: > > > Don't forget, this is a Magnum inverter > and > > > > > Magnum has issues. I have two customers with > Magnum > problems. One is a washer that will work perfectly on > a cheap import inverter; the other has a Vizio TV > that > works fine on shore power and generator. Soooo...maybe > there > are pumps and other items that are anti-Magnum. > > > > > > Larry Crutcher > Starlight Solar > (928) 941-1660 > Renewable Energy Products, Service and > > > > > Installation > > > ------------------------------------------------------------------------ > > > _______________________________________________ > 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 > > > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.5.392 / Virus Database: 270.13.39/2275 - Release > Date: 08/01/09 09:38:00 > > > > > > > -----Inline Attachment Follows----- > > _______________________________________________ > 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
