Generac Power Systems 0661-5 - Manual (Page 27)

Figure 29 — Installation with Isolation Receptacle
BATTERY INSTALLATION
RECOMMENDED BAHERY
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.
BAHERY 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
voitage drop between battery terminals and the gen­
erator connection point should not exceed 0.12 volts
per 100 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.
CABLELENGTH
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.
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