[RE-wrenches] SW AGS
SunHarvest
eric at harvesthesun.com
Thu Aug 8 13:06:50 PDT 2013
Jay,
Stop absorb was enabled but that wasn't the problem. His batteries were shot.
Eric, sorry I couldn't call. My cell phone died. But we figured out the problem. Seems like his system is working fine except for his 48v bank of expensive paper weights.
Because he's still getting some Ah out of his industrial bank I put him on a daily EQ regime to see if we can breathe some life back into his batteries. I figured it's worth a shot and he'll learn more about battery maintenance along the way.
Thanks guys!
Eric Stikes
SunHarvest
001.530.798.3738 (Cell)
----- Original Message -----
From: Eric.Bentsen at schneider-electric.com
To: RE-wrenches
Sent: Wednesday, August 07, 2013 3:24 PM
Subject: Re: [RE-wrenches] SW AGS
Hi Chris,
"Stop absorb" ramps up to the BULK voltage, which replaces approx 80% of capacity. Running the gen thru the
absorption stage will allow for a full charge, but is a waste of fuel (most of abs is at reduced rate), and users want to
charge the rest of the way with RE. The SW uses "Absorption Time" for stop parameter, but if set to "0" would accomplish
the same as stop absorb.
Eric
_____________________________________________________________________________________
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
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From: "Chris Worcester" <chris at solarwindworks.com>
To: "'RE-wrenches'" <re-wrenches at lists.re-wrenches.org>
Date: 08/07/2013 03:17 PM
Subject: Re: [RE-wrenches] SW AGS
Sent by: re-wrenches-bounces at lists.re-wrenches.org
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Now there is a useful setting, just being a little sarcastic, this would be hard to diagnose. Was that available on the SW’s AGS menu too?
Chris Worcester
Solar Wind Works
NABCEP Certified PV Installer
Office 530-582-4503
Cell 530-448-9692
Fax 530-582-4603
www.solarwindworks.com
chris at solarwindworks.com
From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of jay peltz
Sent: Wednesday, August 07, 2013 2:30 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] SW AGS
HI Eric,
Sounds like the "stop absorb" might have been enabled.
This will stop the AGS when the battery volts reach absorb setpoint.
But has no impact if starting the generator manually.
jay
peltz power
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
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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
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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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