Xantrex Truecharge 20+ Amp Owner's Manual - page 40

Operation

3–6

2. Set the Battery Type selector switch according to the table below. 

3. Set the Battery Temperature selector switch for the temperature of 

your battery as follows: 

If temperatures fluctuate near the batteries, set this switch each time 

you charge the batteries.

If your batteries are in different locations with different temperature 

ranges, set the switch to Hot or to the temperature of the warmest 

location.

4. Ventilate the area around the battery thoroughly. Review the charging 

instructions supplied by the manufacturer of your batteries and take 

any steps required such as removing battery caps, adding distilled 

water and so forth. 

5. Apply AC power to Truecharge+ by closing the AC breaker and/or 

applying shorepower. The indicator lights will blink as an 

initialization sequence runs, lasting typically 10 seconds or so. After 

initialization the yellow charging indicator light illuminates.

During charging, the charging current indicator lights show the total 

current being delivered to the batteries. When charging a discharged 

battery, the 20 A indicator light on Truecharge 20+ (40 A indicator 

If your battery is

then select

Flooded (has removable caps 

intended for refilling)

Flooded

Any sealed type but AGM

Gel

Absorbed glass mat

AGM

If battery temperature is 

Select

Below 50 °F (10 °C)

Cold

Between 50 °F (10° C) and 

80 °F (27 °C)

Warm

Above 80 °F (27 °C)

Hot

Note

:

The remote temperature sensor, if installed, overrides this setting, 

and it controls the charge voltage based only on the battery to which 

the sensor is attached.