PowerTech MP3741, User Manual

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1.3 Available Accessories
Note: Parts marked ** may or may not be stocked at any given time. Check
with nearest store for more details.
1. S-485 to WiFi converter (MP3746, sold separately)
Allows wireless programming and monitoring via WiFi from any location with
Internet access. See: “Appendix 1 & 2 Setting parameters using external
controllers.”
2. ** Remote Temperature Sensor (Model: RTS300R47K3.81A)
Monitors 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) on the controller.
NOTE: If not fitted, the temperature of battery will be assumed to be 25ºC.
3. Remote Meter
(MP3748, sold separately)
The digital remote meter displays system operating information, error
indications, parameters setting and self-diagnostics.
4. ** Super Parameter Programmer (Model: SPP-02)
The SPP-02 allows one-button setting operation which is useful for bulk
parameter setting for special projects.
5. USB to RS-485 converter (MP3747, sold separately)
USB to RS-485 converter is used to monitor each controller on the network
using Solar Station PC software. The length of cable is 1.5m. Connects to the
RS-485 Port on the controller. (See: “Appendix 3 & 4 Setting parameters using
external controllers.”
1.4 Maximum Power Point Tracking Technology
Due to the nonlinear characteristics of solar arrays, they have an optimum
voltage/current energy delivery point (Max Power Point). Selection of the best
MPP parameter gives the most efficient use of the available solar energy.
Cheaper controllers, with either simple switch disconnection when full, or PWM
charging technology, cannot charge the battery at the maximum power point,
so can’t extract the maximum energy available from the solar array. Solar
charge controllers with Maximum Power Point Tracking (MPPT) Technology
can continuously lock on the optimum point to harvest the maximum available
energy and deliver it to the battery.
The tracking process is fully automatic and does not need user adjustment.