Windy Nation TrakMax 40 MPPT Solar Charge Controller - Manual (Page 8)

TrakMax 40 User Manual
Revision 1.0
3.3 G ROUNDING
The TrakMax is designed to work with grounded electrical systems. In the controller, ground is not connected
to the input terminal and output terminals.
Use a copper wire to connect the grounding terminal on the TrakMax enclosure to earth ground. The
grounding terminal is located on the lower right corner of the enclosure.
Do not connect the system negative conductor to this terminal. NEC requires the use of an external ground
fault protection device (GFPD). The system electrical negative should be bonded through a GFPD to earth
ground at one (and only one) location. The grounding point may be located in the solar circuit or the battery
circuit.
3.4 C ONNECTIONS
WARNING: Shock Hazard
Solar PV array can produce open-circuit voltages in excess of 100 VDC when in sunlight. Verify that the
solar input breaker or disconnect has been opened (disconnected) before installing the system wires. Note
that the maximum PV open-circuit voltage for the TrakMax is 55 VDC. Do NOT attach the positive and
negative PV cables to the TrakMax until the TrakMax has been connected to the positive and negative
terminals of the 12 or 24 volt battery bank.
It is recommended to use a strain relief (bushings, connectors, clamp connectors, or wire glands) in each of
the three ½ in openings.
The NEC requires that the wires carrying the system current never exceed 80% of the conductor’s current
rating. The table below provides the minimum size of copper wire allowed by NEC. Wire types rated for 75°C
and 90°C are included.
Wire Type 75°C Wire 90°C Wire
Copper 6 AWG (16 mm
2
) 8 AWG (10 mm
2
)
Aluminum 4 AWG (25 mm
2
) 6 AWG (16 mm
2
)
1) Remove the Wiring Cover from the Top Cover by removing the two securing screws as shown below.
2) Route the relevant cable/wire through the appropriate ½ in opening as noted on the cover.
Note: If strain reliefs (i.e.: cable clamps, wire glands) are being used, they must be installed prior to
routing the wire, and the wire should route through the clamp.
LOAD BATTERY PV
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Page 8 of 20 windy nation 03/06/2013