Friday, January 09, 2009

Winter Upkeep: Part 2

In battery lore, there are two critical numbers: The first is the "Charge to" voltage, sometimes referred to as the "Acceptance" voltage. This the the voltage the pack should be charged to after usage. The second number is the "float" voltage. This is the voltage the pack should be held to when not being used i.e., the pack should float along at this voltage when idle. Both voltages are computed, based upon battery type and battery temperatures, among other things.

In the case of my pack, the float voltage at the 30-35 deg.F, is 105.95 - 106.25 volts. Using a thermometer, my PFC20 charger and a lab quality digital voltmeter, I am going to float the pack for a day, or so, to do a rather lengthy "equalizing balance."

(CLICK photo for a larger image)

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