©
2013 Magnum Energy, Inc.
Page 15
Installation
Table 2-2, DC Wire Size For Increased Distance
Inverter Model
Minimum Recommended DC Wire Size (one way)*
5 feet or less
5 to 10 feet
10 to 15 feet
MSH3012M
#4/0 AWG
(107.2 mm
2
)
#4/0 AWG
(107.2 mm
2
) x2
not
recommended
MSH4024M
#2/0 AWG
(67.4 mm
2
)
#4/0 AWG
(107.2 mm
2
)
#4/0 AWG
(107.2 mm
2
) x2
* Copper wire rated with 90°C (194°F) insulation at an ambient temperature of 30°C (86°F) in free air.
2.4.3
DC Cable Connections
Do not put anything between the battery cable ring lug and the battery post or the
fl
at metal part
of the inverter’s DC terminal. When connecting the battery cable to the battery post or inverter
DC terminal, the cable should be placed directly against the inverter terminal or battery post.
Incorrectly installed hardware causes a high resistance connection which could lead to poor inverter/
charger performance, and may melt the cable and terminal connections.
Refer to Figures 2-5 and 2-6 to connect the DC cables and to stack the hardware correctly. Tighten
the terminal connections from 10 to 12 ft lbf (13.6 to 16.3 N-m).
CAUTION:
The DC terminal and Flange/Kep nuts are made of stainless steel which have
a high likelihood of seizure. To help prevent the bolt and nut from seizing—causing the
bolts to strip or snap/break-off—the use of anti-seize lubricant is highly recommended.
Info:
If antioxidant grease or spray is used, apply it after all the connections have been
made and are properly tightened.
Info:
A 1/2-inch wrench or socket is used to tighten the 5/16 SAE Flange/Kep nuts.
Figure 2-5, Battery Hardware
Installation
Figure 2-6, Inverter DC Hardware
Installation
battery cable
(with ring lug)
nut
split washer
flat washer
Battery
Temperature
Sensor
battery
post
CAUTION:
Ensure nothing is
placed between
the cable ring lug
and battery post.
5/16-18
Flange or
Kep nut
battery cable
(with ring lug)
Inverter DC terminal
(
5/16–18 bolt,
5/8" usable length
)
CAUTION:
Ensure nothing is
placed between the DC
terminal and ring lug.
