And if I’m using AGM sealed batteries what voltage in this configuration should I tell the UPS to shut off?
From: Af [mailto:[email protected]] On Behalf Of Sterling Jacobson Sent: Monday, June 13, 2016 4:37 PM To: [email protected] Subject: Re: [AFMUG] Peukert Number I think if you wire in series you add the voltage, so it’s 48v right? But the AH stays the same so I would still have 75Ah? From: Af [mailto:[email protected]] On Behalf Of Josh Luthman Sent: Monday, June 13, 2016 4:31 PM To: [email protected]<mailto:[email protected]> Subject: Re: [AFMUG] Peukert Number If you wire 4 batteries in series that's 12v =) Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On Mon, Jun 13, 2016 at 6:27 PM, George Skorup <[email protected]<mailto:[email protected]>> 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<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 6:23 PM, Sterling Jacobson <[email protected]<mailto:[email protected]>> 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:[email protected]<mailto:[email protected]>] On Behalf Of Josh Luthman Sent: Monday, June 13, 2016 4:20 PM To: [email protected]<mailto:[email protected]> 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 <[email protected]<mailto:[email protected]>> 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?
