CTEK M300 General Information
Input voltage AC 220-240VAC, 50-60Hz
Output voltage Nominal: 12V
Charging voltage 14.4V, Temperature compensated
Charging current 25A max
Back current drain* <2Ah per month
Ambient temperature -20°C to +50°C, output power is reduced automatically at higher temperatures.
Type of charger Eight step, fully automatic, switch mode with pulse maintenance.
Type of batteries All types of 12V lead-acid batteries (Wet, MF, AGM, Calcium/Calcium and GEL).
Battery capacity 50-500Ah
Dimensions (L x W x H) 235x130x65mm
Insulation IP 44 (Outdoor use)***
Mains to charger - 1.8mtr
Charger to battery - 4.0mtr
*) Back current drain is what drains the battery if the charger is connected without the power cord connected.
**) 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.
The M300 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.
***) IP 44 cannot be guaranteed unless the charger is positioned with its top or long side facing up.
The CTEK M300 (25A) is a powerful and complete 8-step, fully-automatic, switch mode battery charger package for dual battery banks, which analyses, charges and maintains all types of boat batteries.
The M300 is a very high capacity unit, capable of charging and maintaining batteries up to 500Ah at a charge rate of up to 25A. The charger itself connects permanently to the battery via heavy duty hard wire cabling, which also includes a temperature sensor so that the charger can adjust the charge rate depending on the battery temperature. The high charge rate and capacity of the charger allows it to quickly and efficiently recover domestic system batteries, which often tend to get heavily discharged during periods moored away from mains power.