Installation Guide

975-0691-01-01 Revision B 4-45
based on the load at the time of readout. Therefore, it should be used as a guide
only. The use of the state-of-charge readout generally gives a more accurate
indication of the overall percentage of battery life remaining.
Time Remaining is still an important readout in certain cases. For example, when
there is a heavy and sustained load, it can be useful to know how much longer
the load can be operated. The time remaining readout will display the total time
available to run the load with the amount of energy available in the battery at the
present time.
Note: The Peukert’s Coefficient is only used to adjust the SOC and Time
Remaining value during a discharge. It is not applied to the Amp-hours Removed
value.
Peukert’s Exponent for Battery Rating
Peukert's Equation describes the effect of different discharge rates on battery
capacity. As the discharge rate increases, the available battery capacity
decreases.
The Battery Monitor uses Peukert's equation for calculating the Time Remaining
function. The amp hours display always shows the actual number of amp hours
consumed. This means that if the battery is rapidly discharged, the time
remaining number may show zero hours remaining before showing the total
number of amp hours of battery capacity consumed.