[RE-wrenches] AGM discrepancy

[Ray Walters]

I'd second that.  Let somebody with a 12 v system play with the pair of 
gray ones.

R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760

On 8/15/2014 5:19 PM, mark at hurshtown.com wrote:
> I would send them back.  If used, I would not install them along with 
> batteries of differing age, or even from a different batch.
>
>     -------- Original Message --------
>     Subject: [RE-wrenches] AGM discrepancy
>     From: Drake <drake.chamberlin at redwoodalliance.org
>     <mailto:drake.chamberlin at redwoodalliance.org>>
>     Date: Fri, August 15, 2014 10:57 am
>     To: RE-wrenches <re-wrenches at lists.re-wrenches.org
>     <mailto:re-wrenches at lists.re-wrenches.org>>
>
>     Hello Wrenches,
>
>     A batch of Full River L-16 DC 400-6 batteries came in, which were
>     purchased at a very good price from a distributor. Of the 16
>     ordered,14 came in blue cases and were labeled 415 AH and 2 came
>     in grey cases and were labeled as 400 AH.
>
>     Calling my distributor and Full River tech support, many different
>     stories have been told. At this point, it seems that the grey
>     cases were discontinued in 2011. According to my supplier, the two
>     types of batteries are identical inside, only the case and AH
>     designation are different.
>
>     Interestingly enough, the grey case batteries hold a slightly
>     higher voltage than the blues. The blues (which are still wired
>     together from their maintenance charge) show 12.96V for 12 V sets.
>     The grey set shows 13.1 V. This is after at least two days off the
>     charger. All the batteries were charged together in a 12 V
>     series-parallel configuration. Is this voltage normal for AGMs?
>
>     I'm considering sending the two greys back with two of the blues
>     (one 24V set). Can the grey case batteries still be good if they
>     were manufactured in 2011?
>
>     What would you do in with the grey batteries? Any insight is welcome.
>
>     Thanks,
>
>     Drake
>
>     Drake Chamberlin
>     /Athens Electric LLC
>     OH License 44810
>     CO License 3773
>     NABCEP Certified Solar PV
>     740-448-7328
>     /http://athens-electric.com/
>
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