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/
