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copper ground wire
must
be securely fastened to the enclosure. A lug and bolt
are included with the unit and may be fastened to the 1/4” threaded hole in the
lower left corner of the enclosure . The other end of the ground wire is
connected to the grounded bus bar within your load center.
11.4 Disconnects and overcurrent protection
Pursuant to National Electric Code requirements (and others which may have
jurisdiction in your locale), disconnects and/or overcurrent protection devices
are required for both the input and output of the MPT-3024. It is recommended
that the PV disconnect should be rated for 30 amps to comply with NEC
requirements. The recommended disconnect between the MPT-3024 and the
battery should be rated for 40 amps. All disconnects should be rated for DC
(direct current) use.
11.5 External surge protection
The MPT-3024 includes gas-discharge surge protection on both the PV+ and
PV- terminals to ground. Additional external protection is highly recommended
if your PV array will be roof mounted or otherwise subject to an increased
likelihood of lightning strike. Damage from lightning is not covered under
warranty.
11.6 External noise filtering
The MPT-3024 includes an adequate amount of capacitance on the input and
output for proper charger operation, and also includes noise filtering within the
voltage and current sensing circuitry that helps to improve its accuracy. Some
sources of power and some types of inverters may introduce unacceptable
levels of noise into the power wiring that connects to the MPT-3024. This noise
may impair operation of the MPT-3024 under extreme conditions, and must be
filtered at the source. Over time, excessive noise may also overwhelm and
degrade the filter capacitors within the MPT-3024. Contact the manufacturer of
any suspect device for assistance.
11.7 Remote temperature sensor installation
Secure the remote temperature sensor to your battery bank. Choose a site that
is likely to experience measurements which accurately reflect the true tempera-
Summary of Contents for MPT-3024
Page 23: ...23 Figure 6 1 2 Efficiency curves for various PV battery combinations at 25o C...
Page 29: ...29 Figure 11 2 2 Suggested wiring diagram...
Page 36: ...36 Figure 12 1 1 Operational flowchart...
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