Xantrex Technology TM500A manual Setting Parameters continued Charge Efficiency %, Configuration

3.0 CONFIGURATION

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.

%LED Indicates Efficiency Function

1

4

9 4

2 3

Set Battery Efficiency

Factor in Display

Figure 3-3

Setting Charger Efficiency

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© 2001 Xantrex Technology Inc. P/N 973-0012-01-02 Rev.A05/01