Typo... should have said 3600 watt-hours for 4 batteries.
bp
<part15sbs{at}gmail{dot}com>
On 6/13/2016 5:40 PM, Sterling Jacobson wrote:
Gotcha.
That makes perfect sense.
*From:*Af [mailto:af-boun...@afmug.com] *On Behalf Of *Bill Prince
*Sent:* Monday, June 13, 2016 5:56 PM
*To:* af@afmug.com
*Subject:* Re: [AFMUG] Peukert Number
The rest of the story is about power. In this case, the best way to
think of it is in watt-hours.
One 75ah, 12v battery is 900 watt-hours.
Two 75ah, 12v batteries is 1800 watt-hours
Three 75ah, 12v batteries is 2700 watt-hours
Four 75ah, 12v batteries is 3600 watt-hours
Now if you connect them in series, you will have one 48v battery (in
concept), with 75ah capacity. It's still 4800 watt-hours.
^^^^
If you connect them in parallel, you will have one 12v battery with
300ah capacity. It's still 4800 watt-hours.
^^^^
bp
<part15sbs{at}gmail{dot}com>
On 6/13/2016 3:27 PM, George Skorup wrote:
Does not compute. If he's running four 75ah batteries in series to
get a 48VDC battery, then he gets 75Ah.
On 6/13/2016 5:24 PM, Josh Luthman wrote:
Oh you're complicating the question...I think.
The capacity from one 75ah is simply quadrupled in your case.
You have 300ah. When you add another (identical) battery
you're adding capacity/runtime linearly.
Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373
On Mon, Jun 13, 2016 at 6:23 PM, Sterling Jacobson
<sterl...@avative.net <mailto:sterl...@avative.net>> wrote:
Yeah, the Alpha will calculate this, but I need to know
how to calculate Peukerts Number.
Or if I’m just running a simple series of four 12v for 48
volts is 1.1 just the default I should use?
Do I add up all the four 75ah ratings per battery and use
that as the rated battery capacity number at 300ah?
*From:*Af [mailto:af-boun...@afmug.com
<mailto:af-boun...@afmug.com>] *On Behalf Of *Josh Luthman
*Sent:* Monday, June 13, 2016 4:20 PM
*To:* af@afmug.com <mailto:af@afmug.com>
*Subject:* Re: [AFMUG] Peukert Number
Peukert's formula, T = C / In (or C = T * In), where C is
theoretical capacity (in amp-hours, equal to actual
capacity at one amp), I is current (in amps), T is time
(in hours), and n is the Peukert number for the battery.
http://www.csgnetwork.com/batterylifecalc.html
This?
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 Mon, Jun 13, 2016 at 6:18 PM, Sterling Jacobson
<sterl...@avative.net <mailto:sterl...@avative.net>> wrote:
Been reviewing my site capacity/UPS/Batteries.
Our Alpha's have a Peukert Number to help identify and
tweak capacity in remaining amp hours.
Can someone give me the short of this calculation?
That is, if I have four 12v batteries run in series
that are 75AH each?
