Operation
Disqualified Batteries
The XC Series can identify when a battery will not accept a charge (battery is damaged) or when it is fully charged (healthy) and does not require further charge. Batteries that will not accept a charge will be removed (disqualified) from the charging sequence until all banks are checked again (every 15 minutes). A damaged battery will continue to be disqualified each cycle and the charger will not waste energy trying to charge it. Under some conditions it is also possible that a healthy battery that is fully charged but unable to accept current (for example, at the moment it transitions from Absorption to Float or Rest) will be deemed unable to be charged and temprarily removed from the charging sequence. The charger will enter an adaptive float/no float behaviour where it will alternate between float charging ( ) and resting the battery ( ) and the 25% Charge Current indicator light on the onboard status panel will flash. The battery will be evaluated every 15 minutes and added back to the charging sequence when it is later able to accept charge.
MeasuringfloBatterydisVoltage rdy
If disqualification occurs during Bulk or Absorption, the battery is damaged or there is another charging source present other than the charger itself. The remote
display will show | and the 25% Charge Current indicator light on the onboard |
status panel will flash. |
|
Use a voltmeter that has a stated accuracy of 0.5% or better on DC voltage. Place the probes of the meter directly on the studs or plates of the charger terminals. Do not probe on the wire lugs or other places in the battery wiring system as this will introduce error into the measurement: the charger monitors battery voltage as measured at the charger terminals.
Temperature Considerations
Xantrex strongly recommends that you install a Battery Temperature Sensor (BTS) to protect your battery and improve charging accuracy. It is best to use a separate BTS with each individual battery bank, to provide optimal charging and protection of each bank. If no BTS is connected, the charger defaults to the charging conditions for 40 °C (104 °F). At this temperature the charging voltage is lower to keep batteries from overcharging; charging will be slower and the batteries will be slightly undercharged.