Getting back on topic (and trying to avoid double-spaces)...
I have two strings of four GEL batteries, all of them the same age. They
are all being charged by the same solar panels/controller. Positive lead
is connected to battery 1, negative to battery 4. Load is connected the
same way. I am now monitoring each battery separately with a pair of
sitemonitor 4-input modules.
One battery I know is bad - 1.1 (bank 1 battery 1). It drops under 12v
at night.
The graphs are puzzling to me. The other batteries I'm not sure on.
Each seems to have a different/profile slope when charging, but similar
(but not identical) slope when discharging. Take a look:
https://dl.dropboxusercontent.com/u/4059343/graff%20voltage%20graps.png
Anyone care to venture a guess as to why we're seeing these differences?
On 9/18/2014 1:57 PM, Chuck McCown via Af wrote:
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Telemetry. Just watch the slope of the discharge voltage at night. I
have tried to use impedance meters several times at different
companies and cannot get results that predict failures.
If you have a battery that should last several days, disconnect the
solar panels and watch the telemetry.
*From:* Randy Cosby via Af <mailto:[email protected]>
*Sent:* Thursday, September 18, 2014 1:06 PM
*To:* [email protected] <mailto:[email protected]>
*Subject:* [AFMUG] battery tester
Does anyone have a recommended battery tester for AGM and Gel
batteries at solar sites? I have batteries from 100AH to 225AH. Most
of the automotive models seem to be concerned with cold cranking amps,
pretty irrelevant for us.
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<http://www.infowest.com/> Randy Cosby
InfoWest, Inc
435-674-0165 x 2010
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<http://www.infowest.com/> Randy Cosby
InfoWest, Inc
435-674-0165 x 2010
infowest.com <http://www.infowest.com/>
This e-mail message contains information from InfoWest, Inc
and is for the sole use of the intended recipient(s) and may
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