M300 is the charger we recommend for boats with large battery banks. The charger has a four metre long secondary cable and a temperature sensor for optimised charging irrespective of temperature, which gives extra flexibility in permanent installations. M300 is a fully automatic eight-stage charger that supplies 25 A and is ideal for batteries between 40 and 500 Ah.
M300 analyses whether the battery can accept and retain the charge, it removes harmful lead sulphate crystals, gives an effective charge and automatically switches to safe maintenance charging when the battery is fully charged.
The practical Recond mode reconditions the battery following deep discharge cycles, which can occur after a long day at sea. If you intend to stay overnight onboard you can switch to Night mode for silent charging.
IP44 classification means M300 is approved for outdoor use. It does not generate any harmful galvanic currents, is fully protected from producing voltages that can damage the vehicle’s electronics and has been developed to offer safe charging: non-sparking, reverse polarity protection and short circuit proof. M300 comes with a five year guarantee.
Eyelet M10 (10,4 mm) Temp sensor on cable.
Auto: Fully automatic for optimal charging
12V: For all lead-acid batteries
Fully Charged Battery / Maintenance Charging
RECOND: Recondition of deeply discharged batteries
Rated Voltage AC 220–240VAC, 50–60Hz
Charging voltage 14.4V
Min battery voltage 2.0V
Charging current 25A max
Current, mains 2.9A rms (at full charging current)
Back current drain <1Ah/month
Ambient temperature -20°C to +50°C, output power is reduced automatically at high temperatures
Charger type 8 step, fully automatic charging cycle
Battery types All types of 12V lead-acid batteries (WET, MF, Ca/Ca, AGM and GEL)
Battery capacity 40–500Ah up to 500Ah for maintenance
Dimensions 235 x 130 x 65mm (L x W x H)
Insulation class IP44
Weight 2.2 kg
CTEK guarantee to the buyer by the name indicated on the receipt of APRTECH only guarantee can not be transferred to others. The warranty covers only the disorders caused by abnormal production of materials used in production within a period specified by the box from the date of purchase. The customer must return the product at the point of sale, along with a receipt. To guarantee an end when the Smart battery charger has been opened or tampered or used carelessly or repaired by other than CTEK SWEDEN AB or its authorized representative. One of the screws on the underside of the charger Sealed. Detachment or break the seal constitutes cancellation guarantee. Not guaranteed beyond the conditions set out in this. And is not responsible for damages other than those set forth above, such damages are affected by the damage. (Consequential damages) Moreover, CTEK SWEDEN AB and APRTECH no obligation to warranty except as specified herein.