hi folks, here's the deka/mk spec sheet with battery charge parameters: gel,
agm and fla.
http://www.dekabatteries.com/assets/base/1913.pdf
and a link to their "solar" battery page
http://www.dekabatteries.com/?pageid=443
regards, bill
Bill Hennessy
Berks Solar, LLC
371 Centennial Rd
Mertztown, PA 19539
o 610 682 4300
c 484 560 4666
NABCEP certified installer
PA contractor #44411
www.berkssolar.com
________________________________
From: "wire...@gmail.com" <wire...@gmail.com>
To: RE-wrenches <re-wrenches@lists.re-wrenches.org>
Sent: Sunday, August 4, 2013 11:14 AM
Subject: Re: [RE-wrenches] (no subject)
Mac,
David Smead of Ample Power has many years experience with gel batteries and has
published this about charging gel batteries:
http://www.amplepower.com/gel/index.html
Larry Liesner
On Aug 3, 2013, at 9:46 PM, Mac Lewis wrote:
Ray,
>
>
>Yes, this is an off-grid applications. I think you are right, the battery guy
>sold him what he had. Pretty pricey battery lesson twice!
>
>
>
>On Sat, Aug 3, 2013 at 6:42 PM, Ray Walters <r...@solarray.com> wrote:
>
>Mac;
>>
>>Is this off grid? The Intimidator is not a high cycle life
battery. I've had trouble finding exact ratings, but its probably
in the 250 to 300 cycles at 80% DOD. I'd expect 3 years max in an
off grid application. Also the Intimidators I've seen are
actually AGM, not Gel, but I don't know. I looked on Deka's
website but didn't find any good charge set points. This is
basically a sealed RV/ Marine battery. Definitely not a top
choice, but its what the battery guys have on the shelf, so that's
what they sell.
>>You're on to the biggest problem, pulling off opposite corners of
the bank to balance the connector resistance between all the
strings.
>>I go out of my way not to poo poo the customer's choice, but to
make sure and let them know you can't guarantee the performance of
the system. I had almost the exact experience just a few months
ago, where the customer had just bought a new set of
Intimidators. I just told him to use them up, no sense in
worrying about it, and when they were worn out, we'd get him
something better. I used AGM setting on the Midnite controller on
that system. Voltage set points should be his responsibility to
track down, if their gel. It keeps you from being responsible for
anything to do with the battery performance or life. When he
needs a new set, you sell him the right stuff, set it up right,
and low and behold you'll look good when they outlast his previous
sets.
>>
>>R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer 303 505-8760
>>On 8/3/2013 5:31 PM, Mac Lewis wrote:
>>
>>Hello wrenches,
>>>
>>>
>>>I am looking for guidance with charging setpoints for a battery that I don't
>>>have experience with. This system was put in by another solar company and
>>>this battery bank failed after 1.5 years. He bought these batteries without
>>>consulting us, but now we are stuck with them.
>>>It is a Deka Intimidator Gel Sealed Battery 12V 225 Ahr. It is set up as 3
>>>strings of 4 batteries to give a 675Ahr bank at 48V. The batteries were not
>>>wired at opposite corners, but inverter/charger leads were connected to the
>>>middle string. We will fix that and other things but I don't use Deka
>>>batteries.
>>>What charger setpoints would you recommend for this battery bank? Does
>>>anyone have a good tech contact at Deka? Anyone have any results to report
>>>about this type of battery in a solar application?
>>>
>>>
>>>Thanks in advance
>>>
>>>
--
>>>
>>>
>>>
>>>
>>>
>>>
>>>
Mac Lewis
>>>
>>>"Yo solo sé que no sé nada." -Sócrates
>>>
>>>
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>
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>
>--
>
>
>
>
>
>
>Mac Lewis
>
>"Yo solo sé que no sé nada." -Sócrates
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