Guardian Technologies 004270-3 User Manual

Generac

®

Power Systems, Inc.

33

Install a battery that meets the following require-
ments:

• The battery must be a 12-volt, automotive-type 

storage battery.

• Use a battery with minimum ratings of 70 amp-

hours and 360 cold-cranking amps.

NOTE:

If the battery is to be used to power other vehicle
accessories, as well as to start the generator, a bat-
tery with a larger capacity may be necessary.

Using battery cables that are too long or too small in
diameter may cause a drop in voltage, which causes
starting problems. For the best cold weather starting,
the voltage drop between battery terminals and the
generator connection point should not exceed 0.12
volts per 100 amps of cranking current.

The QUIETPACT™ 75D generator is rated at about
160 DC amps of cranking current to operate the
starter and glow plugs.

Select battery cables based on (a) cable length and (b)
prevailing ambient temperatures. Generally, the
longer the cable and the colder the weather, the larg-
er the cable size must be, as shown in the chart.

1. Connect the battery cable from the battery post or

terminal, indicated by a POSITIVE, POS, or (+),
to the insulated lug on the unit frame (Figure
2.19).

NOTE:

Check to be sure the cable boot for the positive
cable has been installed.

2. Connect the battery cable from the battery post,

indicated by a NEGATIVE, NEG, or (-), to the
vehicle frame ground connection (Figure 2.19).

3. Connect a cable from the vehicle frame ground to

the negative post on the generator frame.

4. Connect cables so the connectors are clean 

and tight.

◆

◆

◆

CABLE LENGTH

in Feet (meters)

CABLE SIZE

0 to 10 (0 to 3)

2*

11 to 15 (3.4 to 4.5)

0

16 to 20 (4.5 to 6)

000

*For warm weather, use No. 2 cable up to 20 feet.