Greetings, Mechanix~
My post regarding the proper setpoints for an unattended AGM battery
prompted a lively--and enlightening--discussion on the Wrench List.
Thanks as always for being the best in the biz. The Wrench List is the
bomb!
To tie up some loose parts of this thread:
++
m...@centexbatteries.com
Subject: Re: [RE-wrenches] Needed: Outback
setpoints that won't ruin AGM's
Larry,
What do you mean by "deficit charge"? And how would the battery
be damaged and the warranty be voided, p
For more clarity, it does not matter the size or voltage of the battery. You
still need to achieve 0.5% or less of the rated capacity to consider the
battery 100% charged.
Larry
On Jul 9, 2012, at 7:07 AM, Allan Sindelar wrote:
Larry,
While I agree with your assessment of Mick's settings, som
(I am posting this private response on the board because I believe it may
benefit others)
Marc suggested that you only charge the battery until the current is lowered to
2.5% to 3% of the rated capacity. Doing so will undercharge the battery,
leaving a deficit needed to reach 100% SoC. This le
The End Absorb Amps setting forces the MX controller into the float mode once
the Absorb Voltage is reached and sustained for 15 seconds. Here is the text
from Pg. 42 of the MX60 manual (emphasis added):
(End, -AMP, +AMP) Normally, an Absorb charge cycle is terminated because the
battery volta
Larry,
While I agree with your assessment of Mick's settings, some of
what you write doesn't make sense to me, and I'd like to better
understand.
Re: "End Absorb Amps will only look at the controller current, not
net battery current. If loads are on,
Allan,
If you were to charge Lifeline AGM batteries (manufactured by Concorde) as
described by Marc Kurth, you will damage the battery and void the warranty. You
should never consistently deficit charge any lead acid battery. The proper
charge method is clearly spelled out in Document No. 6-010
Mick and Wrenches,
I faced a similar question with a new bank just a couple of weeks
ago. In my case I asked my distributor, and his response is below.
He makes some interesting points, including a very different end
amps than the factory's.
We have r
No. End Absorb Amps will only look at the controller current, not net battery
current. If loads are on, the current may be higher than your setting and the
controller will continue with monitoring the ChgT. More importantly, if current
drops below your setting and the battery is not 100%, it wil
Larry,
Would the Absorb End Amps setting act similarly to the IPN chargers from
Solar Boost if you set a very long absorb time and had it end absorb stage
after it dropped below the desired current level?
Thanks
On Sun, Jul 8, 2012 at 9:40 AM, Larry Crutcher, Starlight Solar Power
Systems wrot
Hello Mick,
I think your set-points for voltage are fine. The Rebulk is of little
importance for an unoccupied property as voltage should be easily maintained.
The bad news: In a nut shell you have told the MX charger to stop charging if
the PV current drops below 45 amps or 0 to 60 minutes aft
Mick,
The SunExtender technical manual says to charge at 2.385 ± 0.015 volts
per cell at 25°C until the charge current drops to 0.5% of the battery
capacity. That's 28.6 ±0.2 volts for a 24 volt system and 28.8 volts is
the top end of that range. If you are seeing signs that the batteries
hav
Hi Mick,
While I don't know what SG they are using in those batteries, I'd say the
voltage was too high at 28.8.
If it was a standard SG then it would be gassing at 28.8 and starting to dry
out the batteries.
( do the batteries look concave?)
The OBCC FM does a rebulk adjustment setpoint, but
Greetings, All~
My client's string of SunXtender two volt AGM's won't hold a charge...after
only two years! The prior AGM batteries also turned to toast prematurely.
There must be a better way, so could we review the Outback charge
setpoints?
Side note: Delta-v from the highest 2v cell to the low
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