Charging GC2 with Rogue MPPT Solar
Charging a pair of USB2000 golf carts with the Rogue MPPT 3048. US battery says the absorb voltage should be 14.7V (for 2 GC2 in series) held for 2-3 hrs, with charge terminated by max time or when...
Forum Discussion
landyacht318 wrote:
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Now I have it set at 1 amp, and 14.9ABsv or 2.5 hours at Absv, and once it requires less than 1.3 amps( 130 amp hour USBattery group 31), to maintain 14.9v or 2.5 hours have passed, then it goes to float mode, which I have set at 15.3v.
But I cycle my batteries daily and I consider the "float" stage as a 'finishing' charge stage, and even with a few hours at 15.3v a day, the SG does not return to baseline on this particular petulant 12v USbattery after 7+ cycles. For storage, not cycling, I would set float to 13.1v as recommended by USbattery.
Does USbattery give a specific charging algorithm for their GC-2's?
I've been going with this PDF from USbattery, and 15.3v is mentioned more than once.
http://www.usbattery.com/usb_images/charging_instruction_2011_3.pdf
I think US Battery has the same protocol for all its batteries. The 2 stage has the absorb as I described with a 13.1V float. The 3 stage includes a finishing step up to 15.3V as you are doing. Equalization is 15.3 for 1-3hrs, which I do every few weeks. My Rogue does not allow the float to be higher than the absorb, so can't really use it to "finish". Sounds like a nice feature to have.
