[RE-wrenches] SW AGS

Wed Aug 7 14:08:07 PDT 2013

Sounds like you talked to the right guy, that's his info...except that he has, according to what he told me, an SW not an XW. I'm assuming he's maybe at 50% capacity on his original 1260Ah bank based on everything he told me this morning. He did say that his bank will last him through the night and that he has some pretty hefty air conditioning loads. He also said he had equalized in the past but not in the last 18 months. I'm just not convinced that his batteries are shot. But all this battery talk may be beside the point if he's not experiencing the same on/off cycling problem when he manually starts the genny, right? That is, assuming the disco settings remain in effect regardless of start mechanism. Thanks for indulging me tocayo.

Eric
SunHarvest
001.530.798.3738 (Cell)

  ----- Original Message ----- 
  From: Eric.Bentsen at schneider-electric.com 
  To: RE-wrenches 
  Sent: Wednesday, August 07, 2013 12:54 PM
  Subject: Re: [RE-wrenches] SW AGS

  Hi Eric, 
   Sounded like bad batteries to me also (I think he called in this AM). He has (2) XW6048 units that are 
  capable of 200ADC between them, and he also has 1260Ah of flooded capacity. DC Start V is set for 46.5V, so if we assume he was close to 50% 
  discharge (depending on load), it should take almost 2 hours to reach the bulk voltage (80% replaced). His batteries were ramping up to bulk 
  in just a couple of minutes, meaning the batteries were not absorbing the charge. I have heard varying opinions on the symptoms of sulfation, 
  but it does sound like a battery issue (5 yrs old). He was advised to equalize to try and recover them (he has never done this), or replace them. 
  Rgds, 

  _____________________________________________________________________________________ 

  Eric Bentsen  |   Schneider Electric   |  Solar Business  |   UNITED STATES  |   Technical Support Representative 
  Phone: +(650) 351-8237 ext. 001#  |   
  Email: eric.bentsen at schneider-electric.com  |   Site: www.schneider-electric.com/solar  |   Address: 250 South Vasco Rd., Livermore, CA 94551 

  *** Please consider the environment before printing this e-mail 

        From:  "SunHarvest" <eric at harvesthesun.com>  
        To:  "RE-wrenches" <re-wrenches at lists.re-wrenches.org>  
        Date:  08/07/2013 12:39 PM  
        Subject:  [RE-wrenches] SW AGS  
        Sent by:  re-wrenches-bounces at lists.re-wrenches.org 

------------------------------------------------------------------------------

  I read through the archives on the XW AGS thread but have a query on behalf of a customer with an SW AGS issue. I'm heading out to the remote site tomorrow and would like, if possible, to show up knowing what I might be up against. 

  The customer recently replaced his AGS for his two SW 6048s and then upgraded his firmware a week later. He reported that his problem with the AGS began after firmware upgrade. Here's the particular issue: 

  AGS will try to start the 15.8kW Multi-Quip genny due to low battery voltage (event 306 DCV start). After about 5 minutes the AGS will stop the genny due to battery absorption level reached (event 313 ABS stop). The AGS will go through this event 306/313 cycle on and off until the homeowner shuts down the AGS. To me this sounds like bad batteries. But, the homeowner says this cycling does not occur when he manually starts the generator. This doesn't sound like a complicated problem but so far I'm unfamiliar with the SW AGS. So, I would greatly appreciate any insight you guys can offer me. 

  Thanks!! 

  Eric
  SunHarvest
  001.530.798.3738 (Cell) 

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