To date, I have not heard of even one battery manufacturer that advocates EQ for sealed batteries. Though I do stand to be corrected if there is a manufacturer that does think this wise.
We have sealed in remote applications that service is not an option and a wet battery would not survive the time span or cost of long time between visits. Recharge capability and load analysis are critical. Esp. if not backup generator or power is available. What is the operating temperature? We have them at 13,000 ft. el. and it gets to 0°F in the building and sometimes lower and they do well but that is due to sizing the load at -20F which nearly doubled the size of the battery bank. What is the manufacturers recommended Volt per cell setting? I have set up and repaired system that the Charge controller was not able to be correctly set to the very specific VPC requirement for that sealed battery and we had to install a CC the met the VPC requirement. They are great for UPS systems that the client will not remember to check them. Life span has varied 6 to 8 years till replacement which is usually less life than an L-16 style which is always been less than a HUP, IBE, or Concorde style battery. I have RE-watered sealed batteries and given a sort of 1 time EQ to bring They have their place but I do not think that is every system. Their lower life span and higher cost are a factor, but this is offset by forgetting to check a wet battery and then having to replace that battery bank for forgetful clients. Dana Orzel Great Solar Works, Inc www.solarwork.com E - d...@solarwork.com V - 970.626.5253 F - 970.626.4140 C - 970.209.4076 I will be the shift in how the world uses power! - Dana Orzel From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of jay peltz Sent: Sunday, November 29, 2009 7:45 PM To: RE-wrenches Subject: Re: [RE-wrenches] concord batteries Hi Conrad, 1. Not usually a good idea to EQ sealed small batteries. This will hasten their death. 2. Best bet at this point is charge them individually or at least parallel at 12v 3. If possible put them on a long long charge to see if they actually charge up. 4. what are the charge set points, I'll guess factory set points of 57.6v? 5. if the above is correct ( too high) with the too low of generator start, the batteries are mostly scrap at this point, jay peltz power On Nov 29, 2009, at 5:48 PM, Conrad Geyser wrote: In the vein of us on grid folks whos 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). Im sure the batteries have been abused at least after the point that someone lowered the generator start voltage to 40V. Were still doing fact finding on the charge parameters for the PV and wind, but Im wondering if there is anyone that has an opinion on the Concorde batteries. And at least at this point, Im 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 No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.709 / Virus Database: 270.14.87/2536 - Release Date: 11/30/09 00:31:00
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