Basically 27.2V to 27.6V at 25C -30mV/degree C temperature factor Colder temperature require higher float voltage and higher temps require lower float voltages.
AGM and GEL would be the same. Wet Lead Acid batteries are different charging specs. Hope this helps, Regards, Scott Parsons Tycon Power -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Mathew Howard Sent: Friday, May 27, 2011 3:00 PM To: 'WISPA General List' Subject: Re: [WISPA] Proper 24V battery float voltage It depends on the temperature, it's been a while since I researched it, but if I remember correctly I decided the best compromise around here would be ~27.5v. you may want it a little higher or lower depending on your climate. I would check the battery manufacturer's website, at least one that I checked had a chart that showed the proper float voltage at various temperatures. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Kristian Hoffmann Sent: Friday, May 27, 2011 1:30 PM To: WISPA General List Subject: [WISPA] Proper 24V battery float voltage Hi, Would someone mind sharing their experience/suggestion on the proper float voltage for a 24V battery bank (2x 12V 44Ah AGM batteries)? I'm using the MeanWell DRP-240-24 along with a DR-UPS40. It's not a three phase charger, but just limits the charging current to 2A. The voltage is adjustable at the source, and will ultimately determine my charge/float voltage. Based on my research, the highest voltage I should use is 13.8x2 = 27.6 to avoid boiling the batteries but still achieving a maximum charge. I was about to move on until I found another source suggesting that the ideal float voltage for telecom UPS batteries was 13.2x2 = 26.4. Thoughts? Thanks, -- Kristian Hoffmann System Administrator [email protected] http://www.fire2wire.com Office - 209-543-1800 | Fax - 209-545-1469 | Toll Free - 800-905-FIRE ---------------------------------------------------------------------------- ---- WISPA Wants You! Join today! http://signup.wispa.org/ ---------------------------------------------------------------------------- ---- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ ---------------------------------------------------------------------------- ---- WISPA Wants You! Join today! http://signup.wispa.org/ ---------------------------------------------------------------------------- ---- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
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