Battery Installation - Generac Power Systems NP-30G Series Owner's Manual And Installation Instructions

Air-cooled recreational vehicle generators
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POWER
SUPPLY
CORD
DOCKSIDE
POWER
RECEPTICAl
VEHIClE A-C
DISTRIBUTION
PANEL
RECOMMENDED BATTERY
Install a battery that meets the following require-
ments:
• Battery must be a 12 volt, automotive type storage bat-
tery.
• For prevailing ambient temperatures above 32°F (0°C),
use a battery rated 70 amp-hours and capable of deliver-
ing 360 cold cranking amperes.
• For prevailing ambient temperatures below 32°F (0°C),
use a battery rated 95 amp-hours and capable of deliver-
ing 450 cold cranking amperes.
IMPORTANT: IF THE BATTERY IS TO BE USED TO
POWER OTHER VEHICLE ACCESSORIES, AS
WELL AS START THE GENERATOR, YOU MAY
NEED A BATTERY WITH A LARGER CAPACITY.
BATTERY INSTALLATION
BATTERY CABLES
Using battery cables that are too long or too small in
diameter may cause a drop in voltage which causes
starting problems. For best cold weather starting, the
voltage drop between battery terminals and the gen-
erator connection point should not exceed 0.12 volts
per 1 00 amperes of cranking current.
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
below.
CABLE LENGTH
in Feet {meters)
CABLE SIZE
0 to 1 0 (0 to 3)
2*
11 to 15 (3.4 to 4.51
0
16 to 20 (4.5 to 6)
000
*For warm weather, use No. 2 cable up to 20 feet.
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