Xantrex Technology TM500A - Manual (Page 20)

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© 2001 Xantrex Technology Inc.
P/N 973-0012-01-02 Rev. A 05/01
Setting Parameters (continued)
Charge Efficiency %
Since batteries are not 100 percent efficient, more energy is required to
charge them than can be extracted. Some of this energy is lost in the form of
heat and gassing. An efficiency factor of 94 to 98% is typical for lead-acid
batteries. Consult the battery manufacturer’s specifications for other
battery types.
Set this value to 96% for new batteries and 94% (or lower) for batteries
already in service. The default setting is 94%. Changing this setting affects
the % State-of-Charge meter. The setting range is from 60 to 100%.
Setting the Charge Efficiency Factor
If the charge efficiency factor is not known and lead-acid batteries are
used in the system, set the charge efficiency factor to 94%. After the
batteries have been discharged and then fully recharged, the amp-hour
reading should be approximately 000. If this reading is negative when the
CHARGED LED (
) flashes, increase the efficiency factor. If the numbers
are substantially going above zero before the CHARGED LED flashes,
decrease the efficiency factor. The setting is correct when the CHARGED
LED flashes and the reading is slightly positive.
1. Press the SELECT button until the BATTERY LEVEL LED ( % ) is
illuminated.
2. Press the SELECT and RESET buttons simulataniously until the LED
display flashes.
3. Press the RESET button to change the displayed efficiency factor.
4. Press the SELECT button to accept the value.
Figure 3-3
Setting Charger Efficiency
Set Battery Efficiency
Factor in Display
% LED Indicates
Efficiency Function
4
1
2 3
9 4
3.0 CONFIGURATION