The Concorde batteries for us have been the most trouble free of any battery we sell or have sold, and we started selling them in the mid-late 90's.
That said, it appears that those have been severely abused and have probably gotten heavily sulfated at best, and totaly ruined at worst. With enough abuse, you can destroy anything, no matter how good. With the genset at 40 volts, that is about 5 volts below the absolute recommended minimum. I gotta wonder who would set up a system like that. I am also betting that the solar is underpowered, and the wind only puts out about 1/5th of what was advertised. .................................................................................................. Northern Arizona Wind & Sun - Electricity From The Sun Since 1979 Solar Discussion Forum: http://www.wind-sun.com/ForumVB/ .................................................................................................. ----- Original Message ----- From: Conrad Geyser To: 'RE-wrenches' Sent: Sunday, November 29, 2009 6:48 PM Subject: [RE-wrenches] concord batteries In the vein of us on grid folks who's heads spin when the off grid folks start talking about charge programming and gen set start up parameters. I am servicing an orphaned 48 V off grid system that is only 1 1/2 years old, with 40 Concorde Sun Extender batteries, which are for the most part, shot (about half of them under 10V after a generator EQ charge). I'm sure the batteries have been abused at least after the point that someone lowered the generator start voltage to 40V. We're still doing fact finding on the charge parameters for the PV and wind, but I'm wondering if there is anyone that has an opinion on the Concorde batteries. And at least at this point, I'm glad I had to study for some off grid questions on the NABCEP test, not to mention the conversations on this list. : > Conrad Cotuit Solar
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