Windy Nation TrakMax 40 MPPT Solar Charge Controller - Manual (Page 10)

TrakMax 40 User Manual
Revision 1.0
3.5 O VERCURRENT P ROTECTION
Circuit breakers or fuses must be installed in both the battery and solar circuits. The protection device ratings
and installation methods must conform to NEC requirements.
The battery circuit fuses or circuit breaker must be rated to 125% of the maximum current or more. The
minimum fuse/breaker rating allowed for use with each TrakMax is 1.25 x 40 Amps = 50 Amps.
If the TrakMax controller system detects an overload status, it will automatically reset the over current
protection system every 6 minutes. If the fault is still present, the controller will shut off and wait for another 6
minutes. This will occur continuously until the problem is corrected.
A disconnect is required for the battery and solar circuits to provide a means for removing power from the
TrakMax. Double pole switches or breakers are convenient for disconnecting both solar and battery
conductors simultaneously.
3.6 O VERVOLTAGE – R EVERSE P OLARITY P ROTECTION
TrakMax is fully protected against reverse polarity and high voltage transients for both the PV and the battery
connections. If the battery is connected in the reverse polarity position, the TrakMax inner fuse will open. If
the PV array is connected in the reverse polarity position, the TrakMax will not turn on.
System Voltage PV Over Voltage Point
12V Battery 30VDC
24V Battery 55VDC
3.7 P ARALLEL C ONNECTION
Multiple TrakMax controllers can be installed in parallel on the same battery bank to achieve higher charging
current. For example, connecting two TrakMax units in parallel can allow for 80 amps of charging current,
and connecting three TrakMax units in parallel can allow for up to 120 amps of charging current. Additional
parallel controllers can also be added in the future. Each TrakMax MPPT Controller must have its own PV
array. See figure 3.5
Figure 3.5: Parallel Connection
Page 10 of 20 windy nation 03/06/2013