It may be the values of the components in the gauge have changed, rendering the inaccurate reading. The car battery test they do at onto stores is simply to rule out a dead cell, and not really good for a deep cycle battery. You could buy a $10 VOM meter and check the voltage yourself and rule the gauge in or out. You could also buy a digital dc volt reading chip from Amazon and wire it in close to the battery. You have to learn the voltages that are considered full and 50%. I think half charge is 12 volts, but regardless, don’t ever discharge below 50% or you decrease the life of the battery dramatically. Good luck.
|