Evening all,
A quick note on DOD.
Batteries / cells are often rated at voltages above and below 1.75VPC (1.7 -
1.85 are "common"), so ratings should be verified with the supplier / model.
However, as anyone that has ever run a discharge test knows, the time /
available AH from 1.8 to 1.7VP
Kent and list,
And I was half awake this morning and realized my error in yesterday's post to which you responded... I said
"A battery is considered empty at 10.75V (12V), or 1.79 VPC."
No, it's at 10.5V, or 1.75 VPC, as you have correctly stated. Sorry.
Allan
Wrenches,
I noticed an error in my reply below when Allan's second comments
arrived. Correction: the battery is considered 100% discharged (not
80%) at 10.5 volts (1.75 vpc) under the conditions of use.
Kent
Kent Osterberg wrote:
William,
I'll try to add a little to Allan's and
William,
I'll try to add a little to Allan's and Ronald Parades'
comments. Nearly every battery manufacturer specifies a maximum 80%
depth of discharge (DOD); that corresponds to about 10.5 volts for a
nominal 12-volt battery. Notice how close that is to the default
setting used by many inver
William,
Here I am repeating the RE equivalent of GAAP, Generally Accepted
Accounting Principles, as applied to battery sizing...
A battery is considered empty at 10.75V (12V), or 1.79 VPC. When you
test a battery's capacity, it's generally down to this point. How
Allan:
Is it possible to discharge a battery to 80%. What is the battery voltage
one would expect with that DOD?
William
At 02:28 PM 3/25/2011, you wrote:
William,
I use 80%, as the intent is that this is maximum, not typical. It's
directly used to calculate the battery capacity on the s
William,
I use 80%, as the intent is that this is maximum, not typical. It's
directly used to calculate the battery capacity on the spreadsheet.
50% is more of a target occasional DoD, but it's not a maximum.
In the sunny Southwest where Windy and I are planted, tha
Friends:
I am using a modified version of the Dankoff load chart (with credit given)
to calculate off-grid loads. There is a section where you enter the
maximum depth of discharge (DOD) for a battery bank. It is my
understanding that the maximum DOD for a lead acid battery bank is 50%.
Is
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