Re: [RE-wrenches] Efficiency Curves of Fronius Inverters?

2009-07-09 Thread Peter Parrish
I have a decidedly skeptical opinion of the Fronius MPP algorithm. A few years ago, I was one of the first (I believe) to notice a curious continuous saw tooth ramping of the DC current and voltage on a couple of Fronius IG4000's. The problem (I was told by Fronius) was triggered by an increasing

Re: [RE-wrenches] Efficiency Curves of Fronius Inverters?

2009-07-09 Thread Wind-sun.com
Efficiency Curves of Fronius Inverters?Some of the early (circa 2000'ish) grid tie inverters (not just Fronius) had problems tracking MPPT at the lower 10-15% or so of the input voltage range. Not sure if that is related to the experience you had with that IG4000 or not.

[RE-wrenches] xw xan buss cable lengths

2009-07-09 Thread jay peltz
Hi All, Does anyone know the max cable length for the xanbus? thanks, jay peltz power ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings:

Re: [RE-wrenches] Kohler 8.5 RES

2009-07-09 Thread toddcory
My dream! I hope someone knows of such a unit, cuz I'd love to know what to recommend to folks. Todd On Monday, July 6, 2009 9:16am, Drake Chamberlin drake.chamber...@redwoodalliance.org said: Thanks to all who have helped with this. The moving target ofgenerator function makes things a bit

Re: [RE-wrenches] Roof Loading request for help

2009-07-09 Thread toddcory
The problem here it about 5 years ago they upped the snow loadrequirements from 40 to 60 p/sf so ANY thing added to the roof needs astructural upgrade. Todd On Tuesday, July 7, 2009 9:59pm, Bill Brooks billbroo...@yahoo.com said: Allan, Check out my website at