Max, I agree with the previous comments regarding likely issues to pursue with this system.
Mr. Undercuffler mentioned temperature compensation as a piece to the puzzle. I was recently troubleshooting a system where there was a large difference between actual and compensated voltages with a SW Plus. The SW Plus uses actual voltage to make decisions regarding generator starting (Xantrex tech support didn¹t have a known reason for this), which led to premature generator starting (and LBCO shutoff) when the batteries were warm. It may be worth checking on which voltage (compensated or not) the XW uses to make these types of decisions. P. Phil Schneider Creative Energies --- On Mon, 8/18/08, Max Balchowsky <[EMAIL PROTECTED]> wrote: > From: Max Balchowsky <[EMAIL PROTECTED]> > Subject: Re: [RE-wrenches] offgrid system question > To: "RE-wrenches" <[email protected]> > Date: Monday, August 18, 2008, 3:00 PM > Dear wrenches, going to look at a system installed by others > and would like some input from some of you with more off > grid experience than I have ( 4 systems over the years). the > system was put on a new home - off grid 20 sharp ND123UJF > panels 4 modules in series - 5 parrallel strings, 2460 total > array dc voltage. mppt 60-150 charge controller, 12 sun > extender sealed AGM batteries, 305 AH at 12 vdc, wired for > 915 AH at 48 volt DC. The system is tripping off when the AC > unit trys to start - AC is comfortmaker 3.5 ton 13 seer. > They say start up inrush is 104 amps (sounds high to me) and > they put a DST 10 soft start on the unit (I think that's > just a big capacitor). I haven't been on site yet but it > sounds to me that they just didn't design enough > inverter capacity into the system...... What are your > thoughts? > > Max Balchowsky > SEE Systems > > _______________________________________________ > List sponsored by Home Power magazine > > [email protected] > > http://lists.re-wrenches.org/listinfo.cgi/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org _______________________________________________ List sponsored by Home Power magazine [email protected] http://lists.re-wrenches.org/listinfo.cgi/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org _______________________________________________ List sponsored by Home Power magazine [email protected] http://lists.re-wrenches.org/listinfo.cgi/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
