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Mastervolt

81300300

Magic 12/24V -10A Charger Converter

The Mastervolt Magic 12/24-10A isolated battery charger/converter converts a 12V source into a stabilized 24V power supply (max 10A) with full galvanic isolation. Ideal for protecting sensitive electronics or charging a 24V battery bank (including Lithium) thanks to its 3-stage charging algorithm, this proven model remains a reliable reference for indoor installations (IP21). Supplied as a single unit with integrated screw terminals.

Retail priceBenefit from the professional rate

$325.22 USD

$325.22 USD ~~$428.20 USD~~

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Low stock

Free pickup point from €150 in France
Pickup at Skysat possible

Custom installation

Trust Skysat to install the equipment on board

Request a quote

Installers near you

thanks to our network of approved installers

Find an installer

Support service

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Technical specifications

IP rating	IP21
Marine-ready	Oui
Operating temperature range	-25 to 60 °C
Cooling method	Maintenance-free vario fans
Dimensions (W x H x D)	227 x 154 x 81 mm
Mounting type	Surface mounting
Weight	1.8
Wired network	MasterBus, RS232
Wired input	Screw terminal block
Wired output	Screw terminal block
Nominal input voltage	12.0
Input voltage range	11-16 V
Nominal output voltage	27.2
Continuous power at 25°C	300.0
Continuous output power (40°C)	240.0
Peak power	300.0
Max efficiency	92.0
Galvanic isolation	Oui
Parallel connection	Oui
Remote on/off support	Oui
Short-circuit protection	Oui
Overload protection	Oui
Recommended fuse rating	30.0
Topologie du convertisseur	Switching converter
Rendement énergétique	92.0
Tension d'isolation galvanique	1500.0
Marine grade	Oui
Courant de sortie	10.0
Max output power	300.0
Tension de sortie	27.2
Tension de sortie ajustable	Oui
Output voltage adjustment range	20-28.5 V
Protection contre la surchauffe	Oui
Protection contre les surtensions	Oui
Type de conversion d'énergie	DC-DC

Detailed description

The Magic 12/24-10A battery charger converter by Mastervolt is designed to regulate and stabilize the electrical voltage aboard your vessel. This DC-DC converter provides reliable conversion from a 12V service battery network to a 24V output with a maximum current of 10A and a power output of 300W. Thanks to its full galvanic isolation between input and output, it effectively protects sensitive communication equipment from interference and voltage drops. Unlike standard non-isolated converters, the Magic series maintains a perfectly stable output voltage of 27.2V (adjustable), even during significant fluctuations in the source battery.

Integrated 3-stage battery charger

More than just a stabilized power supply, the Magic 12/24-10A also functions as an intelligent 3-stage battery charger (Bulk, Absorption, Float). It delivers an 8A charging current suitable for all modern marine battery chemistries, including lead-acid, gel, AGM, spiral, and lithium-ion batteries. The device is fully programmable via a PC using the MasterAdjust software, allowing precise adjustment of charging parameters and voltage thresholds.

Advanced features and system integration

Designed for intensive professional marine environments (MTBF of 180,000 hours), this model stands out for its ability to be connected in parallel, enabling current summation for large consumer banks. It also includes an energy-efficient dimmer function for controlling onboard lighting. Although it has an IP21 protection rating requiring installation in a protected technical area away from moisture, its MasterBus compatibility (via an optional serial interface) facilitates integration and monitoring within the vessel's digital ecosystem.

Expert opinion

Pol CONIN

Digital Manager

« The reference stabilized power supply for protecting sensitive networks »

The Magic 12/24-10A converter is a must-have solution for vessels requiring an isolated 24V power supply from a 12V service battery bank. Its key advantage lies in its full galvanic isolation, essential for preventing ground loops and protecting sensitive navigation electronics. As an installer, I particularly value its dual functionality: it excels as a regulated power supply (300W) but can instantly switch to a precise 3-stage charger (8A) to maintain a remote 24V bank (thruster, windlass), including with Lithium-Ion batteries. Its parallel mounting capability allows for significant system scalability, though its IP21 rating requires installation in a dry, well-ventilated technical space.

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Magic 12/24V -10A Charger Converter

$325.22 USD

$325.22 USD ~~$428.20 USD~~

Frequently Asked Questions

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What is the Mastervolt Magic 12/24-10A converter used for?

It converts an input voltage of 12V into a stabilized output voltage of 24V. It also functions as a 3-stage battery charger, providing full galvanic isolation to protect sensitive equipment.

What is galvanic isolation and what is its advantage?

Galvanic isolation physically separates input and output circuits. This prevents electrical interference and ground loops, protecting sensitive communication and navigation equipment aboard your boat.

What types of batteries can I charge with this converter?

The Magic 12/24-10A is compatible with all modern marine battery chemistries. You can charge:

Flooded lead-acidGelAGMSpiral-woundLithium-ion

Is it possible to connect multiple converters in parallel?

Yes, you can connect multiple Magic converters in parallel. This allows you to sum the current ratings to meet the needs of larger consumer banks, potentially exceeding 100 amps in total.

What is the maximum output power of this device?

This converter delivers a nominal and maximum output power of 300W. Maximum output current is 10A in stabilized power supply mode, and the charging current is 8A in battery charger mode.

Where should I install the converter on board my boat?

It must be installed in a well-ventilated area, protected from rain, moisture, and dust, as its IP rating is IP21. It is recommended to mount it vertically with cables directed downward. Do not install it directly above batteries to avoid exposure to corrosive vapors.

Does the converter include a dimming function for lights?

Yes, it includes a power-saving dimming (dimmer) function. Unlike standard dimmers that dissipate energy as heat, the Magic regulates power supply efficiently to control onboard lighting without unnecessary loss.

How does the built-in 3-stage battery charger work?

The charger uses a three-phase intelligent algorithm:

Bulk: fast charge from 0 to 80%.Absorption: precise charge from 80 to 100%.Float: continuous maintenance of the battery at full charge.

Is this converter compatible with the MasterBus network?

Yes, the Magic 12/24-10A converter is fully compatible with the MasterBus system. To integrate it into your network, simply use a MasterBus serial interface (sold separately).

Which cable section should I use for the installation?

The tinned brass screw terminals on the device accept a maximum cable section of 16 mm² (AWG5). It is strongly recommended to use reliable cable ferrules to secure your electrical connections.

Is the 24V output voltage adjustable?

Yes, the nominal output voltage is factory-set to 27.2V but can be precisely adjusted between 20V and 28.5V. This adjustment is made via a PC using the MasterAdjust software.

How can I program or modify the converter's settings?

The device is fully programmable via a PC or laptop. You must use the built-in communication port with a PC-Link interface and the free MasterAdjust software to fine-tune your charge and voltage settings.

What happens if the source battery voltage fluctuates significantly?

Thanks to its advanced stabilization function, the inverter maintains a perfectly stable output voltage (with a maximum variation of only 2%). It automatically compensates for significant fluctuations or voltage drops from the input battery.

Does the device consume power when operating in standby mode?

Standby power consumption is extremely low, measured at less than 2 mA. However, it is recommended to disconnect the device from the power source if it is not used for an extended period to avoid slow discharge.

How to use the remote switch function or the dimmer?

You can connect a momentary pushbutton switch between the "switch" connection and the DC output ground. A short press turns the device on or off. A long press activates the voltage dimming (dimmer) for lighting.

What built-in protections does this converter have?

The Magic 12/24-10A is equipped with advanced electronic protections against overloads and overheating. It also features an alarm contact that automatically opens in case of input voltage being too low/high or a short circuit.

Can this device be used solely as a stabilized power supply without charging a battery?

Absolutely. It can be used autonomously as a stabilized DC power supply. This allows you to directly and safely power 24V equipment from a 12V shipboard network without needing to connect a battery at the output.

How is the converter cooled during operation?

Cooling of the device is provided by maintenance-free "vario" smart fans. These fans automatically adjust their rotation speed based on internal temperature and required load.

What are the DIP switches (DIP switches) inside used for?

The four DIP switches located inside the housing allow manual configuration of certain basic parameters. For example, you can enable the 3-stage charger mode, adjust the output voltage, or configure the device for parallel mounting.

What is the operating temperature range of the device?

The converter is designed to operate optimally in ambient temperatures ranging from -25 °C to 60 °C. Note that automatic power reduction (derating) applies to protect the device when the temperature exceeds 40 °C.