Generac Power Systems QT100, Owner'S Manual, Page: 21 / 80

BATTERY
All lead-acid storage batteries discharge when not in use. Refer to
specific instructions and warnings that accompany the battery. If
such information is not available, observe the following precau-
tions when handling a battery:
DO NOT use jumper cables and a booster battery to crank or •
start the generator engine.
DO NOT recharge a weak battery while it is installed in the gen- •
erator. Remove battery from generator and recharge in a well-
ventilated area, away from fuel vapors, sparks, heat or flames.
Battery electrolyte fluid is an extremely caustic sulfuric solution •
that can cause severe burns. DO NOT permit fluid to contact
eyes, skin, clothing, painted surfaces, wiring insulation, etc.
If any battery fluid is spilled, flush the affected area with clear
water immediately.
Always wear safety glasses, rubber apron and gloves when •
handling a battery.
Batteries give off explosive hydrogen gas while charging. The •
gas can form an explosive mixture around the battery for sev-
eral hours after charging. Any spark, heat or flames can ignite
the gas and cause an explosion which can shatter the battery,
causing blindness or other serious injury.
BATTERY MAINTENANCE
The battery should be inspected per the “Service Schedule” sec-
tion. The following procedure should be followed for inspection:
1. Inspect the battery posts and cables for tightness and corro-
sion. Tighten and clean as necessary.
2. Check the battery fluid level of unsealed batteries and, if nec-
essary, fill with DISTILLED WATER ONLY. DO NOT USE TAP
WATER IN BATTERIES.
3. Have the state of charge and condition checked. This should
be done with an automotive-type battery hydrometer.
 Storage batteries give off explosive hydrogen
gas. This gas can form an explosive mixture
around the battery for several hours after
charging. The slightest spark can ignite the
gas and cause an explosion. Such an explo-
sion can shatter the battery and cause blind-
ness or other injury. Any area that houses a
storage battery must be properly ventilated.
Do not allow smoking, open flame, sparks or
any spark producing tools or equipment near
the battery.
n
Battery electrolyte fluid is an extremely
caustic sulfuric acid solution that can cause
severe burns. Do not permit fluid to contact
eyes, skin, clothing, painted surfaces, etc.
Wear protective goggles, protective clothing
and gloves when handling a battery. If the
fluid is spilled, flush the affected area imme-
diately with clear water.
n
Do not use any jumper cables or booster
battery to crank and start the generator
engine. If the battery has completely dis-
charged, remove it from the generator for
recharging.
n
Be sure the AUTO/OFF/MANUAL switch is set
to the OFF position before connecting the
battery cables. If the switch is set to AUTO
or MANUAL, the generator can crank and
start as soon as the battery cables are con-
nected.

Be sure the 120VAC power supply to the bat-
tery is turned OFF, or sparking may occur at
the battery posts as the cables are attached
and cause an explosion.
BATTERY REPLACEMENT
When replacing batteries, use the same number and the type of
battery that was supplied with the unit, and is listed in the parts
list in the back of this manual.
NOTE:
The BCI number should be located directly on the battery.
10-4
Maint004 Rev . G 07/10
Maintenance