Re: [RE-wrenches] Voltage discrepancy

[Darryl Thayer]

HI Drake 
BE CAREFULL  I had a battery set explode on me due to a loose connection, it 
had been charging, and I was investagating and the loose connection sparked and 
BANG I was fortunatle to have my goggles on.  Besure to stop charging  then 
vent, then investiagate.  

Also I do not think the water loss is from the controller, question how often 
they run theri generator.  
Darryl

--- On Sat, 8/14/10, boB Gudgel  wrote:

> From: boB Gudgel 
> Subject: Re: [RE-wrenches] Voltage discrepancy
> To: "RE-wrenches" 
> Date: Saturday, August 14, 2010, 5:10 PM
> Drake Chamberlin wrote:
> > boB,
> > 
> > Thanks,  I will check all connections when I get
> out there.  Is there anyway a loose connection could
> cook the batteries?
> 
> A loose connection, if it was like I described, would tend
> to under-charge the batteries.   I would
> think that
> if there were ~that~ much of a voltage drop, and
> significant current, you'd have a pretty hot connection
> somewhere.  Although, if the connection is bad enough,
> you might just get the CC to get to Absorb or
> Float voltage and that would at least limit the current but
> maybe not enough.. 
> Of course, loose connections may not be the problem, but
> that's what I look for first.
> I would measure the voltage at the CC terminal block and
> see if it is telling the truth.
> 
> If the CC is telling the truth, then she may have a bad
> connection, and  then
> it's Warning Will Robinson !!
> 
> Could be intermittent too.   Then ya may
> want to start wiggling and banging on things.
> It sure worked well with TV sets.
> 
> boB
> 
> 
> > 
> > Thanks,
> > 
> > 
> > Drake
> > 
> > 
> > At 03:16 PM 8/14/2010, you wrote:
> >> Drake Chamberlin wrote:
> >>> I called her back just now, and the voltage
> readings on the Mate, MX and Trimetric all match. 
> Humm. 
> >>> The batteries are 4, 4 1/2 year old, U.S.
> Battery L-16s wired in 24 volt configuration.  It seems
> that I remember postings of Wrenches having problems with
> these batteries.  There is about 1 KW STC of PV on the
> roof.
> >> 
> >> Might want to be careful of loose
> connections.  Maybe the MX was putting out some
> high(ish) current and there
> >> was a voltage drop across that connection, and now
> they are reading the same because the current is
> >> lower from the MX.  i.e.  high voltage
> at the terminals of the CC and lower at the actual battery
> terminals.
> >> 
> >> boB
> >> 
> >> 
> >> 
> >> 
> >> 
> >>> 
> >>> At 12:12 PM 8/14/2010, you wrote:
>  Any way she can get a real
> voltmeter?  the MX60 has voltage calibration, so does
> the FX  it sounds like something is over charging,
> perhaps the generator run?   additonal
> details on battery bank size, array size and typical
> load.  Darryl
>  
>  --- On *Sat, 8/14/10, Drake Chamberlin
> //*
> wrote:
>  
>  
>      From: Drake
> Chamberlin 
>      Subject:
> [RE-wrenches] Voltage discrepancy
>      To: "RE-wrenches"
> 
>      Date: Saturday,
> August 14, 2010, 8:58 AM
>  
>      Hello Wrenches,
>  
>      I just got off the
> phone with an off grid system owner who has a
>      voltage
> discrepancy showing between the reading on her MX-60 and
>      both her Mate and
> Trimetric meter.  The MX-60 shows 28.8 V and
>      the Trimetric and
> the Mate both show around 25 volts.  The
>      batteries are
> using a tremendous amount of water.
>  
>      Has anyone seen
> this scenario before?  Do you think the MX-60 is
>      bad?
>  
>      Thanks,
>  
>      Drake Chamberlin
>      Athens Electric
>      OH License 44810
>      CO License 3773
>      NABCEP TM 
> Certified PV Installer
>      Office -
> 740-448-7328
>      Mobile -
> 740-856-9648
>  
>      -Inline
> Attachment Follows-
>  
>  
>    ___
>      List sponsored by
> Home Power magazine
>  
>      List Address: RE-wrenches@lists.re-wrenches.org
>      < 
> http://us.mc519.mail.yahoo.com/mc/compose?to=re-wrenc...@lists.re-wrenches.org
> >
>  
>      Options &
> settings:
>      http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>  
>      List-Archive:
>      http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>  
>      List rules &
> etiquette:
>  
>    www.re-wrenches.org/etiquette.htm 
> 
>      < http://www.re-wrenches.org/etiquette.htm>
>  
>      Check out
> participant bios:
>  
>    www.members.re-wrenches.org  < 
> http://www.members.re-wrenches.org/>
>  
>  
> 
> ___
>  List sponsored by Home Power magazine
>  
>  List Address: RE-wrenches@lists.re-wrenches.org
>  
>  Options & settings:
>  http://lists.re-wrenches.org/options.cgi/re-w

Re: [RE-wrenches] Voltage discrepancy

[boB Gudgel]

Drake Chamberlin wrote:

boB,

Thanks,  I will check all connections when I get out there.  Is there 
anyway a loose connection could cook the batteries?


A loose connection, if it was like I described, would tend to 
under-charge the batteries.   I would think that
if there were ~that~ much of a voltage drop, and significant current, 
you'd have a pretty hot connection
somewhere.  Although, if the connection is bad enough, you might just 
get the CC to get to Absorb or
Float voltage and that would at least limit the current but maybe not 
enough.. 

Of course, loose connections may not be the problem, but that's what I 
look for first.
I would measure the voltage at the CC terminal block and see if it is 
telling the truth.


If the CC is telling the truth, then she may have a bad connection, and  
then

it's Warning Will Robinson !!

Could be intermittent too.   Then ya may want to start wiggling and 
banging on things.

It sure worked well with TV sets.

boB




Thanks,


Drake


At 03:16 PM 8/14/2010, you wrote:

Drake Chamberlin wrote:
I called her back just now, and the voltage readings on the Mate, MX 
and Trimetric all match.  Humm. 

The batteries are 4, 4 1/2 year old, U.S. Battery L-16s wired in 24 
volt configuration.  It seems that I remember postings of Wrenches 
having problems with these batteries.  There is about 1 KW STC of PV 
on the roof.


Might want to be careful of loose connections.  Maybe the MX was 
putting out some high(ish) current and there
was a voltage drop across that connection, and now they are reading 
the same because the current is
lower from the MX.  i.e.  high voltage at the terminals of the CC and 
lower at the actual battery terminals.


boB







At 12:12 PM 8/14/2010, you wrote:
Any way she can get a real voltmeter?  the MX60 has voltage 
calibration, so does the FX  it sounds like something is over 
charging, perhaps the generator run?   additonal details on battery 
bank size, array size and typical load.  Darryl


--- On *Sat, 8/14/10, Drake Chamberlin 
//* wrote:



From: Drake Chamberlin 
Subject: [RE-wrenches] Voltage discrepancy
To: "RE-wrenches" 
Date: Saturday, August 14, 2010, 8:58 AM

Hello Wrenches,

I just got off the phone with an off grid system owner who has a
voltage discrepancy showing between the reading on her MX-60 and
both her Mate and Trimetric meter.  The MX-60 shows 28.8 V and
the Trimetric and the Mate both show around 25 volts.  The
batteries are using a tremendous amount of water.

Has anyone seen this scenario before?  Do you think the MX-60 is
bad?

Thanks,

Drake Chamberlin
Athens Electric
OH License 44810
CO License 3773
NABCEP TM  Certified PV Installer
Office - 740-448-7328
Mobile - 740-856-9648

-Inline Attachment Follows-

___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org
< 
http://us.mc519.mail.yahoo.com/mc/compose?to=re-wrenc...@lists.re-wrenches.org 
>


Options & settings:

http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org


List-Archive:
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules & etiquette:
www.re-wrenches.org/etiquette.htm 


< http://www.re-wrenches.org/etiquette.htm>

Check out participant bios:
www.members.re-wrenches.org 
 < 
http://www.members.re-wrenches.org/>



___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org


List rules & etiquette:
www.re-wrenches.org/etiquette.htm 
 < 
http://www.re-wrenches.org/etiquette.htm>


Check out participant bios:
www.members.re-wrenches.org  < 
http://www.members.re-wrenches.org/>


Drake Chamberlin
Athens Electric
OH License 44810
CO License 3773
NABCEP TM  Certified PV Installer
Office - 740-448-7328
Mobile - 740-856-9648



___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org


List rules & etiquette:
www.re-wrenches.org/etiquette.htm 



Check out participant bios:
www.members.re-wrenches.org 

  


___
List sponsored by Home Power magazine

List 

Re: [RE-wrenches] Voltage discrepancy

[Drake Chamberlin]

boB,

Thanks,  I will check all connections when I get out there.  Is there 
anyway a loose connection could cook the batteries?


Thanks,


Drake


At 03:16 PM 8/14/2010, you wrote:

Drake Chamberlin wrote:
I called her back just now, and the voltage readings on the Mate, 
MX and Trimetric all match.  Humm.


The batteries are 4, 4 1/2 year old, U.S. Battery L-16s wired in 24 
volt configuration.  It seems that I remember postings of Wrenches 
having problems with these batteries.  There is about 1 KW STC of 
PV on the roof.


Might want to be careful of loose connections.  Maybe the MX was 
putting out some high(ish) current and there
was a voltage drop across that connection, and now they are reading 
the same because the current is
lower from the MX.  i.e.  high voltage at the terminals of the CC 
and lower at the actual battery terminals.


boB







At 12:12 PM 8/14/2010, you wrote:
Any way she can get a real voltmeter?  the MX60 has voltage 
calibration, so does the FX  it sounds like something is over 
charging, perhaps the generator run?   additonal details on 
battery bank size, array size and typical load.  Darryl


--- On *Sat, 8/14/10, Drake Chamberlin 
//* wrote:



From: Drake Chamberlin 
Subject: [RE-wrenches] Voltage discrepancy
To: "RE-wrenches" 
Date: Saturday, August 14, 2010, 8:58 AM

Hello Wrenches,

I just got off the phone with an off grid system owner who has a
voltage discrepancy showing between the reading on her MX-60 and
both her Mate and Trimetric meter.  The MX-60 shows 28.8 V and
the Trimetric and the Mate both show around 25 volts.  The
batteries are using a tremendous amount of water.

Has anyone seen this scenario before?  Do you think the MX-60 is
bad?

Thanks,

Drake Chamberlin
Athens Electric
OH License 44810
CO License 3773
NABCEP TM  Certified PV Installer
Office - 740-448-7328
Mobile - 740-856-9648

-Inline Attachment Follows-

___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org



Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive:
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules & etiquette:
www.re-wrenches.org/etiquette.htm


Check out participant bios:
www.members.re-wrenches.org 


___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org


List rules & etiquette:
www.re-wrenches.org/etiquette.htm 

Check out participant bios:
www.members.re-wrenches.org 


Drake Chamberlin
Athens Electric
OH License 44810
CO License 3773
NABCEP TM  Certified PV Installer
Office - 740-448-7328
Mobile - 740-856-9648



___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org


List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org




___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org


List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org


Drake Chamberlin
Athens Electric
OH License 44810
CO License 3773
NABCEP TM  Certified PV Installer
Office - 740-448-7328
Mobile - 740-856-9648  ___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Aluminum conduit LBs

[Keith Cronin]

You might consider using a gutter in lieu of the LB or a junction box if the 
site conditions are conducive.




From: Marco Mangelsdorf 
To: RE-wrenches 
Sent: Sat, August 14, 2010 6:47:37 AM
Subject: [RE-wrenches] Aluminum conduit LBs

 
The lesson was that even if, say, for a 2 ½ “ conduit says three 350 MCMs are 
OK, that doesn’t mean that a 2 ½” LB I was planning on using is rated for three 
350s.
 
For the first time ever I saw printed in the LB itself the specified max 
conduct 
size, in this case 4/0 for a 2 ½” LB.
 
So for this short conduit run I upsized everything to 3”.
 
I looked at the Thomas and Betts spec sheet kindly supplied by Ratico on their 
LB offerings and there was no notation of max conductor sizes that I could find.
 
marco 
 
Marco,
I'm curious to know what you did after the "hard" lesson. Was it an issue of 
difficult/impossible installation, or an AHJ issue? It seems like the most 
straightforward solution in a situation like this is to replace your conduit 
bodies (LBs in this case) with a larger size, and then install reducers in 
order 
to leave the existing conduit runs intact. I'm looking at an upcoming 
installation where I would like to use 1-1/4" EMT, but will need 1-1/2" conduit 
bodies to be ok with wire fill. 

 
-Hans
 


 
From:re-wrenches-boun...@lists.re-wrenches.org 
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Marco 
Mangelsdorf
Sent: Thursday, August 12, 2010 8:19 PM
To: 'RE-wrenches'
Subject: [RE-wrenches] Aluminum conduit LBs
Anyone know where I could go to find out the max conductor sizes that threaded 
Al. LBs can handle?
 
I learned the hard way that a conduit of X inches that can handle conductors of 
a certain size does not necessarily mean that a LB of the same diameter can 
handle the same size conductors.
 
Thanks,
marco
 
No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 9.0.851 / Virus Database: 271.1.1/3067 - Release Date: 08/12/10 
08:34:00___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Voltage discrepancy

[boB Gudgel]

Drake Chamberlin wrote:
I called her back just now, and the voltage readings on the Mate, MX 
and Trimetric all match.  Humm.  

The batteries are 4, 4 1/2 year old, U.S. Battery L-16s wired in 24 
volt configuration.  It seems that I remember postings of Wrenches 
having problems with these batteries.  There is about 1 KW STC of PV 
on the roof. 





Might want to be careful of loose connections.  Maybe the MX was putting 
out some high(ish) current and there
was a voltage drop across that connection, and now they are reading the 
same because the current is
lower from the MX.  i.e.  high voltage at the terminals of the CC and 
lower at the actual battery terminals.


boB







At 12:12 PM 8/14/2010, you wrote:
Any way she can get a real voltmeter?  the MX60 has voltage 
calibration, so does the FX  it sounds like something is over 
charging, perhaps the generator run?   additonal details on battery 
bank size, array size and typical load. 
 
Darryl


--- On *Sat, 8/14/10, Drake Chamberlin 
//* wrote:



From: Drake Chamberlin 
Subject: [RE-wrenches] Voltage discrepancy
To: "RE-wrenches" 
Date: Saturday, August 14, 2010, 8:58 AM

Hello Wrenches,

I just got off the phone with an off grid system owner who has a
voltage discrepancy showing between the reading on her MX-60 and
both her Mate and Trimetric meter.  The MX-60 shows 28.8 V and
the Trimetric and the Mate both show around 25 volts.  The
batteries are using a tremendous amount of water.

Has anyone seen this scenario before?  Do you think the MX-60 is
bad?

Thanks,

Drake Chamberlin
Athens Electric
OH License 44810
CO License 3773
NABCEP TM  Certified PV Installer
Office - 740-448-7328
Mobile - 740-856-9648

-Inline Attachment Follows-

___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org



Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive:
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules & etiquette:
www.re-wrenches.org/etiquette.htm


Check out participant bios:
www.members.re-wrenches.org 


___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org


List rules & etiquette:
www.re-wrenches.org/etiquette.htm 



Check out participant bios:
www.members.re-wrenches.org 


Drake Chamberlin
Athens Electric
OH License 44810
CO License 3773
NABCEP TM  Certified PV Installer
Office - 740-448-7328
Mobile - 740-856-9648



___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

  


___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Voltage discrepancy

[Drake Chamberlin]

I called her back just now, and the voltage readings on the Mate, MX 
and Trimetric all match.  Humm.


The batteries are 4, 4 1/2 year old, U.S. Battery L-16s wired in 24 
volt configuration.  It seems that I remember postings of Wrenches 
having problems with these batteries.  There is about 1 KW STC of PV 
on the roof.




At 12:12 PM 8/14/2010, you wrote:
Any way she can get a real voltmeter?  the MX60 has voltage 
calibration, so does the FX  it sounds like something is over 
charging, perhaps the generator run?   additonal details on battery 
bank size, array size and typical load.


Darryl

--- On Sat, 8/14/10, Drake Chamberlin 
 wrote:


From: Drake Chamberlin 
Subject: [RE-wrenches] Voltage discrepancy
To: "RE-wrenches" 
Date: Saturday, August 14, 2010, 8:58 AM

Hello Wrenches,

I just got off the phone with an off grid system owner who has a 
voltage discrepancy showing between the reading on her MX-60 and 
both her Mate and Trimetric meter.  The MX-60 shows 28.8 V and the 
Trimetric and the Mate both show around 25 volts.  The batteries are 
using a tremendous amount of water.


Has anyone seen this scenario before?  Do you think the MX-60 is bad?

Thanks,

Drake Chamberlin
Athens Electric
OH License 44810
CO License 3773
NABCEP TM  Certified PV Installer
Office - 740-448-7328
Mobile - 740-856-9648

-Inline Attachment Follows-

___
List sponsored by Home Power magazine

List Address: 
RE-wrenches@lists.re-wrenches.org


Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org


List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org


___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org


List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org


Drake Chamberlin
Athens Electric
OH License 44810
CO License 3773
NABCEP TM  Certified PV Installer
Office - 740-448-7328
Mobile - 740-856-9648  ___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

[RE-wrenches] Aluminum conduit LBs

[Marco Mangelsdorf]

The lesson was that even if, say, for a 2 ½ “ conduit says three 350 MCMs
are OK, that doesn’t mean that a 2 ½” LB I was planning on using is rated
for three 350s.

 

For the first time ever I saw printed in the LB itself the specified max
conduct size, in this case 4/0 for a 2 ½” LB.

 

So for this short conduit run I upsized everything to 3”.

 

I looked at the Thomas and Betts spec sheet kindly supplied by Ratico on
their LB offerings and there was no notation of max conductor sizes that I
could find.

 

marco 

 

Marco,

I'm curious to know what you did after the "hard" lesson. Was it an issue of
difficult/impossible installation, or an AHJ issue? It seems like the most
straightforward solution in a situation like this is to replace your conduit
bodies (LBs in this case) with a larger size, and then install reducers in
order to leave the existing conduit runs intact. I'm looking at an upcoming
installation where I would like to use 1-1/4" EMT, but will need 1-1/2"
conduit bodies to be ok with wire fill. 

 

-Hans

 

  _  

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Marco
Mangelsdorf
Sent: Thursday, August 12, 2010 8:19 PM
To: 'RE-wrenches'
Subject: [RE-wrenches] Aluminum conduit LBs

Anyone know where I could go to find out the max conductor sizes that
threaded Al. LBs can handle?

 

I learned the hard way that a conduit of X inches that can handle conductors
of a certain size does not necessarily mean that a LB of the same diameter
can handle the same size conductors.

 

Thanks,

marco

 

No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 9.0.851 / Virus Database: 271.1.1/3067 - Release Date: 08/12/10
08:34:00

___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Voltage discrepancy

[Darryl Thayer]

Any way she can get a real voltmeter?  the MX60 has voltage calibration, so 
does the FX  it sounds like something is over charging, perhaps the generator 
run?   additonal details on battery bank size, array size and typical load.  
 
Darryl

--- On Sat, 8/14/10, Drake Chamberlin  
wrote:


From: Drake Chamberlin 
Subject: [RE-wrenches] Voltage discrepancy
To: "RE-wrenches" 
Date: Saturday, August 14, 2010, 8:58 AM


Hello Wrenches, 

I just got off the phone with an off grid system owner who has a voltage 
discrepancy showing between the reading on her MX-60 and both her Mate and 
Trimetric meter.  The MX-60 shows 28.8 V and the Trimetric and the Mate both 
show around 25 volts.  The batteries are using a tremendous amount of water.

Has anyone seen this scenario before?  Do you think the MX-60 is bad? 

Thanks,


Drake Chamberlin
Athens Electric
OH License 44810
CO License 3773
NABCEP TM  Certified PV Installer 
Office - 740-448-7328
Mobile - 740-856-9648 
-Inline Attachment Follows-


___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org




  ___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Voltage discrepancy

[Allan Sindelar]

  
  
Drake,
I'd start by having her disconnect the temp sensor. If it has
failed, it can cause false voltage compensation.

However, if the MX60 is reading higher than actual, as your post
suggests, I would more expect it to regulate sooner, thus leading to
less water consumption, not more.
Allan


  
  
  
  
  
  
  
  
Allan Sindelar
Allan@positiveenergysolar.com
NABCEP Certified Photovoltaic Installer
EE98J Journeyman Electrician
Positive Energy, Inc.
3201 Calle Marie
Santa Fe, New Mexico 87507
505 424-1112
www.positiveenergysolar.com
  


On 8/14/2010 7:58 AM, Drake Chamberlin wrote:

  Hello Wrenches, 
  
  I just got off the phone with an off grid system owner who has a
  voltage
  discrepancy showing between the reading on her MX-60 and both her
  Mate
  and Trimetric meter.  The MX-60 shows 28.8 V and the Trimetric and
  the Mate both show around 25 volts.  The batteries are using a
  tremendous amount of water.
  
  Has anyone seen this scenario before?  Do you think the MX-60 is
  bad? 
  
  Thanks,
  
  

  Drake Chamberlin
Athens Electric
OH License 44810
CO License 3773
NABCEP TM 
  Certified PV Installer 
Office - 740-448-7328
Mobile - 740-856-9648 


___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org


  
  

___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

[RE-wrenches] Voltage discrepancy

[Drake Chamberlin]

Hello Wrenches,

I just got off the phone with an off grid system owner who has a 
voltage discrepancy showing between the reading on her MX-60 and both 
her Mate and Trimetric meter.  The MX-60 shows 28.8 V and the 
Trimetric and the Mate both show around 25 volts.  The batteries are 
using a tremendous amount of water.


Has anyone seen this scenario before?  Do you think the MX-60 is bad?

Thanks,


Drake Chamberlin
Athens Electric
OH License 44810
CO License 3773
NABCEP TM  Certified PV Installer
Office - 740-448-7328
Mobile - 740-856-9648  ___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org