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Installation
DC Wiring
CAUTION: Equipment Damage
Never reverse the polarity of the battery cables. Always use correct polarity.
CAUTION: Fire Hazard
Always install a breaker, fuse, or protective device to protect the DC system.
Table 4 DC Conductor Size and Torque Requirements
Inverter | Nominal DC Amps | Conductor Size | Breaker Size |
| (Derated 125%) | (Minimum) |
|
GFX1312E | 130 | 70 mm2 (2/0 AWG or 0.105 in2) | 175 Adc |
GFX1424E | 70 | 70 mm2 (1/0 AWG or 0.083 in2) | 125 Adc |
GFX1448E | 35 | 50 mm2 (#1 AWG or 0.066 in2) | 100 Adc |
Terminal Location | Torque Requirements |
| |
Inverter DC Terminals | 4 Nm (35 |
| |
Battery Terminals | See battery manufacturer’s recommendations |
When installing DC cables:
Note minimum sizes in Table 4, but refer to local codes for absolute cable size recommendations.
Battery positive and negative cables should be no longer than 3 meters (10 feet) each, to minimize voltage loss and other effects.
Always install breakers or fuses on the positive cable.
The cables listed above are for each inverter in a system. In a system with multiple inverters, each inverter requires its own cables and breakers of the size indicated.
The inverter’s battery terminal is a threaded stud which accepts a ring terminal lug. Use crimped and sealed copper ring lugs with 0.79 cm (5/16 in) holes, or use compression lugs.
Tie, tape, or twist cables together to reduce
Make certain the DC breaker is turned to the off position, or the fuse is removed, before proceeding.
If present, remove the battery terminal covers. These are made of stiff plastic with a
Figure 8 Battery Terminal Covers
19 |