Right.....a single discharge doesn't automatically destroy them. Some
battery vendors publish charts that show the number of expected
charge/discharge cycles compared to depth of discharge. There's a
dramatic difference in lifespan, but one complete discharge isn't
killing you.
Another consideration is you don't want the electrolyte to freeze.
According to my reading, freezing the battery probably will destroy it,
and the temperature required to make them freeze is much lower when they
are charged vs when they are dead. There's a nice chart in table1 here:
http://www.trojanbattery.com/pdf/WP_DeepCycleBatteryStorage_0512.pdf
That might make a good case for that 75% LVD.
On 12/2/2015 3:29 PM, Sean Heskett wrote:
i have run our solar sites down to dead (well, at least low enough
voltage that everything shut down) a few times over the years and the
batts just keep working. i wouldn't want to do it all the time tho lol
it's not really a one and done situation.
YMMV
On Wed, Dec 2, 2015 at 12:56 PM, That One Guy /sarcasm
<thatoneguyst...@gmail.com <mailto:thatoneguyst...@gmail.com>> wrote:
so how dead does it make the battery for fully discharge, the
rhetoric, is run em down, throw them away, is there a rule of
thumb for damage?
On Wed, Dec 2, 2015 at 12:49 PM, Bill Prince <part15...@gmail.com
<mailto:part15...@gmail.com>> wrote:
He didn't indicate how the 400 ah were configured. Is it one
12V 400 ah battery, or one 24v 400 ah battery, etc. But as you
noted, once you convert the battery voltage and amp-hours to
watts, it eliminates any confusion.
If I had 4800 watt-hours of battery (assuming 12V X 4 at 100
amp-hours), I would estimate 9 hours of run time until the
batteries are dead as a doornail. If you want to use them
again (and most people do), then cut that time in half.
On the other hand, if you have a 48 volt battery with a 400
amp-hour rating, then you actually have 19,200 watt-hours of
capacity, and you could multiply the above by 4.
If you configure the four 12V/100 ah batteries in series, then
you don't have 400 ah, you have 48V/100 ah. The watt-hours are
the same.
bp
<part15sbs{at}gmail{dot}com>
On 12/2/2015 10:23 AM, Mathew Howard wrote:
watt-hours stay the same - 200x24 and 100x48 both equal 4800
watt hours. In other words, unless you have some horribly
inefficient voltage converters in the mix, it makes little
difference.
On Wed, Dec 2, 2015 at 12:05 PM, Bill Prince
<part15...@gmail.com <mailto:part15...@gmail.com>> wrote:
wrong.
bp
<part15sbs{at}gmail{dot}com>
On 12/2/2015 10:04 AM, Josh Luthman wrote:
If you do 4x 12v 100ah batteries and do 24v it's twice
the time as 48v
Josh Luthman
Office: 937-552-2340 <tel:937-552-2340>
Direct: 937-552-2343 <tel:937-552-2343>
1100 Wayne St
Suite 1337
Troy, OH 45373
On Dec 2, 2015 1:01 PM, "Bill Prince"
<part15...@gmail.com <mailto:part15...@gmail.com>> wrote:
What voltage?
bp
<part15sbs{at}gmail{dot}com>
On 12/2/2015 10:00 AM, TJ Trout wrote:
How long will 500w load last on 400ah?
--
If you only see yourself as part of the team but you don't see
your team as part of yourself you have already failed as part of
the team.
