Xantrex-technology MS2000 Bedienungsanleitung Seite 47

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Operation
975-0125-02-01 217
Charger Operation with Battery Temperature Sensor
Since battery temperature is a key factor in optimal charging, the house battery
charger voltage will be adjusted (automatically and continuously) according to the
actual battery temperature to ensure that the house battery is fully charged, but not
overcharged. For this reason, Xantrex has included a battery temperature sensor
(see Figure 2-11) with your MS2000 Sine Wave Inverter/Charger that allows the
main charger to provide this temperature-compensated charge formula. The Echo
Charger output bank is not temperature compensated.
The battery temperature sensor continuously measures the temperature of the
house battery and adjusts the main charger output for a more accurate,
temperature-compensated charge.
When batteries are cold, their chemical reaction is sluggish, meaning they dont
absorb charge as easily. Thus a charge level optimized for room temperature will
not charge the batteries sufficiently if they are cold. The main charger must
compensate by increasing its voltage to achieve the compensated equivalent of a
room temperature charge.
If the batteries are hot, the chemical reaction is hyperactive and they absorb
energy too easily; thus a standard room-temperature charge would tend to
overcharge a hot battery. Therefore, the main charger compensates by reducing its
voltage.
The battery temperature sensor automatically, and continuously, makes
adjustments to the main chargers voltage setpoints to properly charge your
batteries. The actual charge compensation formula can be found on page A3.
If a battery temperature sensor is not present, the MS2000 uses the cold, warm,
and hot settings. Charging may not be effective at extreme temperatures. See
Main Charger Specifications on page A3.
Important:
It is normal to see a voltage that is different than the specified
setpoint when charging if the battery case temperature is above or below 77 °F
(25 °C)
Figure 2-11
Battery Temperature Sensor
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