Installation Manual

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2.0 Installation

The DC wires must have soldered and crimped lugs, crimped copper

compression lugs, or aluminum mechanical lugs. Soldered connec-

tions alone are not acceptable for this application.

Table 1, Recommended DC Wire/Overcurrent Device

If the inverter is expected to operate at a distance greater than

three feet from the battery bank, the DC wire size will need to be

increased to overcome the increase in resistance – which affects the

performance of the inverter. Continue to use the overcurrent device

and DC ground wire previously determined from Table 1 and then,

refer to Table 2 to determine the minimum DC wire size you need for

various distances based on your inverter model.

Note 1 - Maximum Continuous Current is based on the inverter’s continuous

power rating at the lowest input voltage with an inefﬁ ciency factor.

Note 2 - Per the NEC, the DC grounding electrode conductor can be a #6

AWG conductor if that is the only connection to the grounding electrode and

that grounding electrode is a pipe, rod, or plate electrode.

Note 3 - Wire size is based on the requirements needed to increase efﬁ cien-

cy and reduce stress to the inverter.

Note 4 - The next larger standard size overcurrent device may be used if

the de-rated cable ampacity falls between the standard overcurrent devices

found in the NEC.

Info: The term “in free air” is deﬁ ned by the NEC as not

encased in conduit or raceway.

Inverter Model

MM612AE MM1512AE MM1524AE

Maximum Continuous

Current¹

80 amps 200 amps 100 amps

DC Grounding

Electrode Wire Size

# 6 AWG # 6 AWG # 6 AWG

Minimum DC Wire Size

(90˚C rating in free air)

# 2 AWG

(190 amps)

# 1/0 AWG

(260 amps)

# 1/0 AWG

(260 amps)

Maximum DC

Fuse Size

200 amps with

time delay

300 amps with

time delay

300 amps with

time delay