Mastervolt ChargeMaster Plus 24/40-3

40 A, 24V
Currently out of stock
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Charging current (max)2

Product details

The Mastervolt ChargeMaster Plus Battery Charger 24/40-3 is a professional battery charger designed for marine and recreational vehicle applications. This three-stage charger delivers 40 amps at 24 volts, allowing for efficient charging of lead-acid, gel, and AGM batteries commonly used in boats, yachts, and motorhomes. With dimensions of approximately 300 mm in width, 200 mm in height, and 100 mm in depth, and a weight of around 3.5 kg, this compact unit features a robust design with a waterproof housing rated IP65, making it suitable for harsh marine environments. The charger integrates advanced microprocessor control technology that automatically adjusts charging parameters based on the battery's condition, ensuring optimal charging cycles while preventing overcharging. It operates with an input voltage range of 180-265 V AC and maintains high efficiency with minimal energy loss during operation. The device includes temperature compensation functionality, which adjusts the charging voltage according to fluctuations in ambient temperature, thereby extending battery life. Constructed with high-quality components and equipped with comprehensive protection circuits against short circuits, reverse polarity, and overheating, this charger offers reliable performance under demanding conditions. The successor to earlier ChargeMaster versions, it includes enhanced safety features and improved charging algorithms for better battery maintenance. Suitable for professional marine applications and recreational boating, this charger represents Mastervolt's commitment to durable, high-performance marine electrical equipment.

Key specifications

Vehicle
BoatCaravan
Suitable battery technology
AGMLead Acid Gel
Charging current (max)
40 A
Charging voltage
24V
Safety function
OverheatingReverse polarityShort circuit

General information

Item number
58073284
Manufacturer
Mastervolt
Category
Car battery chargers
Manufacturer No.
44320405
Release date
29.4.2025

Battery charger properties

Vehicle
BoatCaravan
Suitable battery technology
AGMLead Acid Gel
Charging current (max)
40 A
Charging current at 24V
40 A

Power supply

Power supply
Electrical connection

Battery properties

Charging voltage
24V

Mains supply properties

Input voltage
180 - 265 V

Safety

Protection type (IP code)
IP65
Safety function
OverheatingReverse polarityShort circuit

Scope of delivery

Scope of delivery
Manual

Product dimensions

Length
30 cm
Width
20 cm
Height
10 cm
Weight
3500 g

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Reviews & Ratings

Warranty score

How often does a product of this brand in the «Car battery chargers» category have a defect within the first 24 months?

Source: Digitec Galaxus
  • Mastervolt
    Not enough data
  • 1.Bosch Automotive
    0.4 %
  • 1.Ctek
    0.4 %
  • 1.Tecmate
    0.4 %
  • 4.Dino
    0.5 %

Warranty case duration

How many working days on average does it take to process a warranty claim from when it arrives at the service centre until it’s back with the customer?

Source: Digitec Galaxus
  • Mastervolt
    Not enough data
  • 1.Einhell
    0 days
  • 2.Noco
    1 day
  • 3.Ctek
    2 days
  • 4.Victron Energy
    4 days

Return rate

How often is a product of this brand in the «Car battery chargers» category returned?

Source: Digitec Galaxus
  • Mastervolt
    Not enough data
  • 1.Kraftmax
    0.6 %
  • 2.Tecmate
    1 %
  • 3.Ctek
    1.4 %
  • 4.AEG
    1.8 %
Source: Digitec Galaxus