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CTEK MULTI US 25000 User Manual

CTEK MULTI US 25000
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Battery Charger
MULTI US 25000
For lead-acid batteries 50–500Ah
Users Manual and Guide to professional
charging of starter and deep cycle batteries.
US
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CTEK MULTI US 25000 Specifications

General IconGeneral
Output Voltage12V
Max Output Current25A
InsulationIP44
Type of BatteriesLead-acid (Wet, MF, Ca/Ca, AGM, GEL)
Dimensions235 x 130 x 65 mm
Protection FeaturesReverse polarity protection, Short circuit protection, Over-temperature protection
Charging Modes8-step charging (including desulfation and reconditioning)

Summary

Battery Charger

MULTI US 25000

Model name of the CTEK battery charger.

For lead-acid batteries 50-500Ah

Specifies the compatible battery capacity range for the charger.

Introduction

Important Safety Instructions

California Proposition 65

Warning regarding chemicals known to cause cancer or reproductive toxicity.

Save These Instructions

Instruction to retain the manual for safety and operating guidelines.

Safety Precautions

Warning - Risk of Explosive Gases

Highlights the danger of explosive gases generated by lead-acid batteries.

Personal Precautions

Guidelines for personal safety when working near lead-acid batteries.

Preparing to Charge

Charger Location

Recommendations for safely positioning the battery charger.

DC Connection Precautions

Safety measures for connecting and disconnecting DC output clips.

Connecting Battery Installed in Vehicle

For Negative-grounded Vehicle

Procedure for connecting the charger to a negative-grounded vehicle.

For Positive grounded Vehicle

Procedure for connecting the charger to a positive-grounded vehicle.

Connecting Battery Outside Vehicle

Important Safety Information

Crucial safety advice for charging batteries when removed from a vehicle.

Battery Types and Settings

Mode 14.4V - Normal Setting

Details the Normal charging mode for various battery types.

Mode 13.6V / Supply

Explains the Supply mode for maintenance charging.

Mode 15.7V / 3A / 0.5-4h

Describes the Recond mode for deeply discharged batteries.

Charging Phases

Charging Indicators and Status

Explains the meaning of charging lamps and indicator lights.

Charging Phases Diagram

Visual representation of the battery charging stages.

Normal Charging Mode Details

Desulphation

Charging step for sulphated batteries indicated by blinking lamp 1.

Soft Start

Initial charging phase to gradually increase voltage.

Bulk Charging

Primary charging stage restoring most battery capacity.

Absorption Charging

Final charging phase with gradually reduced current.

Analysis Phase

Suspends charging to measure battery voltage for faults.

Maintenance Charging - Float

Maintains battery at constant voltage for a period.

Maintenance Charging - Pulse

Maintains battery charge with pulses when not in use.

Supply Mode Details

Recond Mode Details

Indicators and Error Mode

Indicator Description

Table listing indicator lights and their meanings.

Error Mode

Describes situations leading to error mode and how to reset.

Bulk Charging Time

Technical Data

AC Extension Cords

Recommended Minimum AWG Size

Table showing recommended AWG wire sizes for extension cords.

Overheating Protection

Battery Cables

Temperature Compensation

Maintenance

Limited Warranty

CTEK Products Protection

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