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02/26/2012: "28 Volt Battery System Details"

I am using two 100AH AGM batteries in series. using an IOTA DLS 27-15/IQ4 15 amp charger. The IOTA is an intelligent charger with three modes:

LED steady on -- float charge at 2.266V/cell -- 27.192V total
LED slow blink -- absorption charge at 2.366V/cell -- 28.392V total
LED fast blink -- bulk charge at 2.466V/cell -- 29.592V total