Increase the charge voltage of your service battery! Charging service batteries can be a challenge. Charging takes a long time, and batteries often do not fill up. This is a well-known problem in ships, service vans, recreational vehicles and trucks. Smart alternators and start/stop systems compound this problem. Robust DC-DC charger guarantees optimum condition of your user battery Traditionally, a user battery is connected to the starter battery by means of a charging relay. The starter battery is placed close to the alternator and receives the largest share of the charging current, typically the user battery is placed further away. Long cables then cause voltage drop, leading to longer charging times. This, in turn, causes equipment failure and shorter battery life. Modern, energy-efficient engines are equipped with smart alternators built to Euro 5 or Euro 6 emission standards. Instead of providing constant voltage, smart alternators use variable voltage; after a short charging period, the voltage is reduced and the charging process stops. In the process, the recovery of braking energy leads to voltage spikes. Traditionally coupled user batteries therefore hardly receive any charge and are damaged by the voltage spikes. To solve this problem, Mastervolt introduces the Mac Plus DC-DC chargers in 12 V and 24 V versions. The Mac Plus monitors the user battery and compensates for voltage loss. Its proven 3-step charging method ensures a fast and safe charging process. In addition, the Mac Plus protects your user battery and sensitive equipment by stabilising the charging voltage. Features Fast and safe charging during short trips. Quiet operation due to fan-less design. Suitable for wet, Gel, AGM and Li-ion batteries (incl. LiFePO4). Charges even completely discharged batteries. Detects if the motor is running, thus protecting the starter battery. Adjustable current limitation for Euro 5/6 standardisation. Voltage stabiliser protects sensitive equipment, lighting and other loads. Parallel operation allows charging currents of more than 100 amps. MasterBus for intelligent system monitoring and automation. Temperature and voltage compensation for optimum charging performance. E-mark certification for mobile applications. Acts as a voltage source if no battery is present. Robust connections for easy installation and quickly adjustable via DIP switches. In non-isolated Mac Plus models, input and output are electrically connected. Features: Low cost. Efficient: low heat generation. Compact. Applicable in applications with negative earthing. Applications Optimises the charging process when a user battery is far away from the charging source, or in systems with a smart alternator. When a stable power supply or different system voltage is required. Euro 5/6 solution Charging a user battery in a Euro 5/6 application? The Mac Plus ensures a constant charge current to the consumer battery even when the alternator is not active. Parallel operation Connecting several units in parallel gives current ratings of over 100 amps. Advanced high-frequency technology with modern microprocessors ensure minimal losses when converting from 24 V to 12 V and vice versa. Solid connections The Mac and Magic models have a galvanised brass terminal block with screw contacts or chrome-plated sliding contacts for DC in/out. The Mac Plus' robust M8 connections prevent loosening.