Generac 4451, 4582 Charging a Battery, To recharge 12 Volt batteries, proceed as follows

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Section 2 — Operation

Commercial-Industrial-Residential Portable Generator System

2.12 CHARGING A BATTERY

DANGER! Storage batteries give off explosive hydrogen

gas while recharging. An explosive mixture will remain around the battery for a long time after it has been charged. The slightest spark can ignite the hydrogen and cause an explosion. Such an explosion can shatter the battery and cause blindness or other serious injury.

DANGER! Do not permit smoking, open flame, sparks

or any other source of heat around a battery. Wear protective goggles, rubber apron and rubber gloves when working around a battery. Battery electrolyte fluid is an extremely caustic sulfuric acid solution that can cause severe burns. If spill occurs flush area with clear water immediately.

Your generator has the capability of recharging a discharged 12 Volt automotive or utility style storage battery. Do not use the unit to charge any 6 Volt batteries. Do not use the unit to crank an engine having a discharged battery.

To recharge 12 Volt batteries, proceed as follows:

Check fluid level in all battery cells. If necessary, add ONLY distilled water to cover separators in battery cells. Do not use tap water.

If the battery is equipped with vent caps, make sure they are installed and are tight.

If necessary, clean battery terminals.

Connect battery charge cable connector plug to panel receptacle identified by the words "12-VOLT D.C."

Connect battery charge cable clamp with red handle to the positive (+) battery terminal.

Connect battery charge cable clamp with black handle to the negative (-) battery terminal.

Start engine. Let the engine run while battery recharges. Engine idle control switch must be in off position for battery charging.

When battery has charged, shut down engine.

Note: Use an automotive hydrometer to test battery state of charge and condition. Follow the hydrometer manufacturer's instructions carefully. Generally, a battery is considered to be at 100% state of charge when specific gravity of its fluid (as measured by hydrometer) is 1.260 or higher.

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Contents Owner’s Manual Safety Rules General Information Introduction General Hazards Important Safety InstructionsElectrical Hazards Explosion HazardsFire Hazards Assembling the Wheel KIT AssemblyAccessory BOX UnpackingHandle Assembly Battery ConnectionKnow the Generator OperationCord Sets and Connection Plugs 1 AC, 20 AMP, Duplex Receptacle2 120V AC, 20 AMP, Gfci Receptacle Provided. This receptacle can not recharge 6 Volt batteries 5 12 Volt DC, 10 AMP ReceptacleGrounding the Generator HOW to USE the GeneratorConnecting Electrical Loads DON’T Overload the GeneratorWattage Reference Guide Before Starting the GeneratorAdding Engine OIL Adding Gasoline To Start the EngineStopping the Engine Automatic Idle ControlCold Weather OPERATION/ DE-ICER LOW OIL Pressure Shutdown SystemTo recharge 12 Volt batteries, proceed as follows Charging a BatteryEngine Specifications Maintenance ScheduleProduct Specifications Generator SpecificationsGeneral Recommendations Service AIR Cleaner Clean Spark Arrestor ScreenReplacing the Spark Plug To adjust valve clearance Adjusting Valve ClearanceStorage General Long Term StorageOther Storage Tips Troubleshooting Commercial-Industrial-Residential Portable Generator System Commercial-Industrial-Residential Portable Generator System Wiring Diagram Drawing No E0228 Schematic Drawing No E0229-A GT-990 & GT-760 Engine Page 1 Drawing No E8589E Item Part NO. QTY. Description GT-990 & GT-760 Engine Page 2 Drawing No E8589E QTY Description Generator Drawing No D4488-D QTY. Description Control Panel Drawing No E0227B Part NO. QTY. Description Frame, Handle & Wheel Kit Drawing No E0695-A QTY Description California Emission Control Warranty Statement Emission Control System Warranty Warranty Schedule Generac Power SYSTEMS, INC. P.O. Box 297 Whitewater, WI