Generac Power Systems 00862-1 - Manual (Page 29)

BATTERY INSTALLATION
RECOMMENDED BAHERY
Install a battery that meets the following requirements:
• 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 400 cold cranking amperes.
• For prevailing ambient temperatures below 32°F (0°C),
use a battery rated 95 amp-hours and capable of deliver­
ing 400 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
voltage drop between battery terminals and the gen­
erator connection point should not exceed 0.12 volts
per 100 amperes of cranking current.
QP55 generators are rated at about 10ODC amperes
of cranking current.
Select battery cables based on (a) cable length, and
(b) prevailing ambient temperatures. Generaliy, the
longer the cable and the colder the weather, the larg­
er the cable size must be, as shown in the chart.
CABLE LENGTH
in Feet (meters) CABLE SIZE
Oto 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.
BATTERY CABLE CONNECTIONS
1. Connect the battery cable from the battery post or termi­
nal indicated by a POSITIVE, POS or (+) to the lug on the
starter contactor (Figure 32).
NOTE: Check to be sure the battery cable boot for
the starter cable has been installed.
2. Connect the battery cable from the battery post indicated
by a NEGATIVE, NEG or (-) to the frame ground connec­
tion (Figure 32).
3. Connect cables so the connectors are clean and tight.
BATTERY COMPARTMENT
Install the generator battery in its own, vented com­
partment. Place the battery compartment away from
any source of heat, sparks or flame.
Provide ventilation openings in the battery compart­
ment. The minimum size of openings should be 2
square inches at the top of the compartment. Mount
the battery on a strong, rigid supporting structure,
where leaks and spills of battery fluid will not cause
damage.
Figure 32 — Connecting Battery Cables
FRONT VIEW OF GENERATOR
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