Hi, knuckle-busters~ That's interesting information in the other thread about the actual solar throughput to grid with the Xantrex XW architecture.
May I now poll the group to learn what percentage throughput is likely if the inverter stack is instead an AC coupled blend of SMA SunnyBoy/SunnyIsland hardware? Survey says... Mick Abraham, Proprietor www.abrahamsolar.com Voice: 970-731-4675 On Tue, Aug 24, 2010 at 8:40 PM, Maverick Brown [Maverick Solar] < maver...@mavericksolar.com> wrote: > There is a XW6048 double-stack that has 11,760W PV and gets 8200+ W > Output (in our Texas heat) and creates about 60kwh per day. > > That 8/11-ish number is right at 70%. I am sure the early spring will be > better. > > I also suggest that 400Ah is the minimum battery bank size required for a > proper sell-re that keeps the battery full enough to prevent sulfation, but > limits overvoltage issues in puffy cloud conditions. > > Good luck! > > Maverick > > Maverick Brown > BSEET, NABCEP Certified Solar PV Installer ® > President & CEO > *Maverick Solar Enterprises, Inc. > *12010 West Highway 290, Suite 230, Austin, TX 78737 > Office: 512-919-4493 > Fax: 512-607-6398 > Cell: 512-460-9825 > Store: http://www.mavericksolar.com > Help: http://www.mavericksolar.net > Corporate: http://www.mavericksolarenterprises.com > > ------------------------------ > *From:* re-wrenches-boun...@lists.re-wrenches.org [mailto: > re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *Travis Creswell > *Sent:* Tuesday, August 24, 2010 4:11 PM > *To:* 'RE-wrenches' > *Subject:* [RE-wrenches] Net AC kW Derate Factor for Xantrex XW inverter > andXW opinions > > Greetings Esteemed Wrenches, > > > > What would you recommend I use for a total de-rate factor for a grid tied > Xantrex XW system with 4.14 kW of Yingli 230 watt modules? Yingli’s are > rated +/- 3% which probably means at least -5% to be safe. Would a total of > .7 be about right? Battery bank will likely be one string of L-16’s or > similar. > > > > I’m helping a customer calculate annual production for his rebate. At this > point it’s just an estimate as Arkansas wisely bases their rebate on actual > production and requires a dedicated meter for the system. I’m using the > Wiley Asset tool to adjust for shading and azimuth. The Asset software uses > .77 as a default but that’s for a battery-less system. > > > > Probably before I head too far down this road what does anyone have to say > about using the XW6048 for a grid tied application? I’ve used a few XW’s > off grid and have been pleased but never grid tied one. > > > > Best, > > > > Travis Creswell > > Ozark Energy Services > > _______________________________________________ > 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
