CTEK Multi XT4000 Battery Charger CTEK XT4000 General Information Input voltage AC 220-240VAC, 50-60Hz Output voltage Nominal: 24V Efficiency 85% Charging voltage 28.8V, 29.4V, 31.4V Charging current 4A max Back current drain1 <1mA Ripple2 <5% rms Ambient temperature -20°C to +50°C (output power is reduced automatically at higher temperatures). Eight step, fully automatic, switch mode with pulse maintenance. All types of 24V lead-acid batteries (Wet, MF, AGM and GEL). Battery capacity 8-100Ah Charging 250Ah maintenance Dimensions (L x W x H) 191x89x48mm Insulation IP65 Weight 0.8kg 1 Back current drain is what drains the battery if the charger is connected without the power cord connected. 2 Ripple denotes the amount of interference there is to the current and voltage. A high current ripple heats the battery and shortens its life. A linear charger has a current ripple of 70 - 400% which is much larger than the maximum 5% for a modern sealed battery. Voltage ripple could harm other equipment, which is connected to the battery. MULTI XT4000 delivers voltage and current with very low ripple. The battery gains a long service life and there is no risk of damage to other electronic devices connected to the battery. The Ctek MULTI XT4000 is a battery charger boasting intelligent features found in the rest of the Ctek range, but developed specifically for 24V batteries. The XT4000 is a cost effective and reliable charger ideal for use in smaller 24v vehicle applications, wheelchairs, piste machinery, school buses and back-up systems.