[RE-wrenches] SEALED batteries

[Dana]

To date, I have not heard of even one battery manufacturer that advocates EQ
for sealed batteries. Though I do stand to be corrected if there is a
manufacturer that does think this wise.

 

We have sealed in remote applications that service is not an option and a
wet battery would not survive the time span or cost of long time between
visits. 

 

Recharge capability and load analysis are critical. Esp. if not backup
generator or power is available. 

 

What is the operating temperature? We have them at 13,000 ft. el. and it
gets to 0°F in the building and sometimes lower and they do well but that is
due to sizing the load at -20F which nearly doubled the size of the battery
bank.

 

What is the manufacturers recommended Volt per cell setting?  I have set up
and repaired system that the Charge controller was not able to be correctly
set to the very specific VPC requirement for that sealed battery and we had
to install a CC the met the VPC requirement.

They are great for UPS systems that the client will not remember to check
them.

 

Life span has varied 6 to 8 years till replacement which is usually less
life than an L-16 style which is always been less than a HUP, IBE, or
Concorde style battery.

 

I have RE-watered sealed batteries and given a sort of 1 time EQ to bring 

 

They have their place but I do not think that is every system. Their lower
life span and higher cost are a factor, but this is offset by forgetting to
check a wet battery and then having to replace that battery bank for
forgetful clients.

 

Dana Orzel

 

Great Solar Works, Inc

www.solarwork.com

E - dana at solarwork.com

V - 970.626.5253

F - 970.626.4140

C - 970.209.4076

 

I will be the shift in how the world uses power! - Dana Orzel

 

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of jay peltz
Sent: Sunday, November 29, 2009 7:45 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] concord batteries

 

Hi Conrad,

 

1. Not usually a good idea to EQ sealed small batteries.  This will hasten
their death.

 

2. Best bet at this point is charge them individually or at least parallel
at 12v

 

3. If possible put them on a long long charge to see if they actually charge
up.

 

4. what are the charge set points, I'll guess factory set points  of 57.6v?

 

5. if the above is correct ( too high) with the too low of generator start,
the batteries are mostly scrap at this point,

 

jay

peltz power

 

 

 

 

On Nov 29, 2009, at 5:48 PM, Conrad Geyser wrote:





In the vein of us on grid folks who’s heads spin when the off grid folks
start talking about charge programming and gen set start up parameters


 

I am servicing an orphaned 48 V off grid system that is only 1 1/2 years
old, with 40 Concorde Sun Extender batteries, which are for the most part,
shot (about half of them under 10V after a generator EQ charge).  I’m sure
the batteries have been abused at least after the point that someone lowered
the generator start voltage to 40V.  We’re still doing fact finding on the
charge parameters for the PV and wind, but I’m wondering if there is anyone
that has an opinion on the Concorde batteries.

 

And at least at this point, I’m glad I had to study for some off grid
questions on the NABCEP test, not to mention the conversations on this list.
: >

 

Conrad

Cotuit Solar

 

 

 

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