[RE-wrenches] Net AC kW Derate Factor for Xantrex XW inverter and XW opinions
Travis Creswell
tcreswell at ozarkenergyservices.com
Tue Aug 24 14:11:16 PDT 2010
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
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