Windy Nation TrakMax 40 MPPT Solar Charge Controller - Manual (Page 15)

TrakMax 40 User Manual
Revision 1.0
5) Reset the BATTERY TYPE SELECTOR potentiometer to the appropriate setting for the system
batteries when the Equalize charge has completed
4.3 DC L OAD C ONTROL
The TrakMax can operate as a PV charge controller and can regulate up to 40 Amps of continuous
photovoltaic (PV) array current at 12 / 24-volts DC for charging batteries. At the same time the TrakMax can
provide a maximum of 15 Amps of current to a DC load, but the 40 Amp current rating is shared between the
battery and the DC load.
The TrakMax uses voltage set points to determine when to disconnect or reconnect loads depending on
battery voltage. TrakMax prevents damage to the battery from over-discharge during periods of poor weather
or excessive loads and can charge the batteries in this function.
4.3.1 Auto Night Disconnect
When using PV Charge Control mode, the PV array is automatically disconnected from the battery at night to
prevent reverse leakage of power and to protect the PV array.
4.3.2 Low Voltage Disconnect
When configured as a load controller, the TrakMax will disconnect the load from the batteries when it
reaches the low voltage disconnect (LVD) setting. There will be a 1-minute delay after the voltage drops
below the LVD setting before the controller actually disconnects the load.
4.3.3 Low Voltage Reconnect
The TrakMax will also provide automatic reconnection of the loads at the low voltage reconnect (LVR)
setting. Reconnection of the load is allowed once the battery voltage has exceeded the low voltage
reconnect (LVR) setting. Loads are automatically reconnected when battery voltage exceeds the low voltage
reconnect (LVR) setting for 1 minute.
Important: When using the TrakMax in load control do not install the BTS Battery Temperature Sensor
4.4 B ATTERY S ELECTION
It is important to select the battery type that matches the system battery to ensure proper charging and long
battery life. T
he battery type selector (Figure 4.4) is a 10 position rotary switch used to set the TrakMax for
the proper float and bulk voltage levels. These levels are selected depending on the type of batteries used.
Refer to the table below for the charge voltages in the various switch positions.
Refer to the specifications
provided by the battery manufacturer and choose a setting that best fits the recommended charging profile.
Figure 4.4: Battery Type Selector
4.4.1 Battery Type Selector Switch Settings
• Battery Type: The common battery type associated with the specified charging settings.
• Float Stage: When the battery is fully charged, the charging voltage will be reduced to the Float
voltage setting.
Page 15 of 20 windy nation 03/06/2013