User's Manual

For example, assume the discharge floor is set to 50%. Then the CEF

algorithm starts operating when 100% - 50% / 10 = 5% is discharged

from a fully charged battery. When the discharge floor is set to 0%,

this level is 100% - 0% / 10 = 10%.

Charged parameters

Based on increasing charge voltage and decreasing charge current, a

decision can be made whether the battery is fully charged. When the

battery voltage is above a certain level during a predefined time

while the charge current is below a certain level during the same

time, the battery can be considered as fully charged. These voltage

and current levels as well as the predefined time are called charged

parameters. In general for a 12 V lead acid battery, the voltage

charged parameter is 13.2 V and the current charged parameter is

2.0% of the total battery capacity (for example, 4 A with a 200 Ah

battery). A charged parameter time of 4 minutes is sufficient for

most battery systems. Please note that these parameters are very

important for correct operation of your Xantrex Battery Monitor,

and must be set appropriately in the corresponding Functions.

Synchronizing the Xantrex Battery Monitor

For a reliable readout of the state of charge of the battery, the battery

monitor has to be synchronized regularly with battery and charger.

This is accomplished by fully charging the battery. When the charger

is operating in the “float” stage, the charger considers the battery

full. At this moment the Xantrex Battery Monitor must consider the

battery as full too, so that the amp-hour counting can be reset to zero

and the state of charge reading set to 100.0%. By precisely adjusting

the charged parameters in the Xantrex Battery Monitor, the battery

monitor can automatically synchronize with the charger when the

“float” stage is reached. The range of the charged parameters is wide

enough to adjust the Xantrex Battery Monitor to most battery

charging methods.

When the Xantrex Battery Monitor cannot be adjusted to the

charging algorithm of the installed charger, the user can always

synchronize the battery monitor manually when the battery is fully

charged. This is realized by pressing both < and > selection keys

simultaneously for three seconds. By manually synchronizing the

battery monitor, the CEF will not be calculated automatically.

When the supply voltage of the Xantrex Battery Monitor

has been interrupted, the battery monitor must always be

synchronized in order to operate correctly.