6
Explanations:
Connection for a RTS (Remote Temperature Sensor) to remotely detect battery
temperature.
Accessories Instructions
1) Remote Temperature Sensor (Model: RTS300R47K3.81A)
Acquisition of battery temperature for undertaking temperature compensation of
control parameters, the standard length of the cable is 3m (length can be customized).
The RTS300R47K3.81A connects to the port (3 ʰ) on the controller.
NOTE: Unplug the RTS, the temperature of battery will be set to a fixed value 25°C.
Maximum Power Point Tracking Technology
Due to the nonlinear characteristics of solar array, there is a maximum energy output
point (Max Power Point) on its curve. Traditional controllers, with switch charging
technology and PWM charging technology, can't charge the battery at the maximum
power point, so can't harvest the maximum energy available from PV array, but the solar
charge controller with Maximum Power Point Tracking (MPPT) Technology can lock on
the point to harvest the maximum energy and deliver it to the battery.
The MPPT algorithm of our company continuously compares and adjusts the operating
points to attempt to locate the maximum power point of the array. The tracking process
is fully automatic and does not need user adjustment.
As the Figure 1-2, the curve is also the characteristic curve of the array, the MPPT
technology will ‘boost’ the battery charge current through tracking the MPP. Assuming
100% conversion efficiency of the solar system, in that way, the following formula is
established:
Normally, the V
Mpp
is always higher than V
Bat.
Due to the principle of conversion of
energy, the I
Bat
is always higher than I
Pv
- The greater the discrepancy between V
Mpp
V
Bat
the greater the discrepancy between I
Pv
& I
Bat
. The greater the discrepancy between
array and battery, the bigger reduction of the conversion efficiency of the system, thus
the controller's conversion efficiency is particularly important in the PV system.
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