CTEK M300 12v Marine Battery Chargers from Supac Ltd

Product Code: CTEK - M300

Brand: CTEK

Product Features

  • Nominal Voltage: 12 Volt
  • Charging Voltage: 14.4 V
  • Charging Current: 25 A
  • Charger Type: 8 stage, fully automatic
  • Battery Type: 12V Lead Acid (WET, MF, AGM, Calcium/Calcium & GEL
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Product Description


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.

Product Specification
Nominal Voltage 12 Volt
Charging Voltage 14.4 V
Charging Current 25 A
Charger Type 8 stage, fully automatic
Battery Type 12V Lead Acid (WET, MF, AGM, Calcium/Calcium & GEL
Battery Capacity Range 40 - 500 Ah
Battery Maintenance Up to 500 Ah
Insulation IP44
Dimensions 235 x 130 x 65mm (L x W x H)
Weight 2.2 kg
Warranty 5 Year
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