ROGUE MPT-3024, Installation Manual And Owner'S Manual, Page: 30 / 52

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Before connecting any wires to the MPT-3024, check the voltage
present on each pair. Voltage should not exceed 60 volts under any
circumstances.
With all external disconnects in the “OFF” position,
securely fasten each wire in
its proper location on the terminal block and tighten screws. See Figures
11.2.1 and 11.2.2 for assistance with correct wiring.
!
To increase efficiency and reliability, the MPT-3024 does not use any
relays, mechanical contacts, or blocking diodes to ensure correct polarity
of any wires connected to the terminal block BAT connections. As a result,
there is no reverse battery protection offered on this unit. Connecting a
battery backward across the BAT or PV terminals will cause immediate and
irreversible damage to the controller, which is not covered under warranty.
This can be easily avoided by double checking the polarity of the battery
wires with a multimeter prior to connecting them to the MPT-3024, double
checking them again before any external disconnects are moved to the
“ON” position, and ensuring that all wires are connected to their proper
terminals. Reverse PV protection of 30 amps under short circuit conditions
is provided.
11.3 Grounding
The enclosure of the MPT-3024 is floating with respect to all circuit voltages
and may be used with either negatively or positively grounded systems. It may
also be used with systems in which neither negative or positive are grounded,
as allowed by NEC 690-41 for systems of less than 50 volts. Most systems are
negatively grounded, or utilize an isolated ground to which neither negative or
positive conductors are grounded. However, it is necessary for a few types of
systems to produce a negative voltage when referenced to ground — in this
case, ground will be considered positive.
!
In a positively grounded installation, be sure that the PV+ and BAT+
terminals are
never
connected together at a common point anywhere in the
system.
For code compliance, basic electrical safety, and enhanced EMI shielding, one