interVOLT 24VDC - 12VDC 25 Amp Isolated Maxi Voltage Converter & Power Conditioner - SVCi241225G2

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Key Features

  • Premium grade 24V to 12V step-down voltage converter and DC power conditioner

  • User adjustable output voltage from 12.0V to 14.4V for line-load and battery charging applications

  • Highly stable (< 20mV ripple) under a range of input conditions (17 - 33 VDC input)

  • Heavy duty 25 Amp continuous output - Galvanic isolation between input and output

  • Innovative operator interface and circuit protection features


A 24V to 12V voltage converter is used primarily for connecting 12VDC equipment in a 24VDC wired application. An isolated power conditioner eliminates the spikes, dips and noise generated by the input source. The interVOLT SVCi241225G2 is a converter, stabilizer, isolator and regulator all built into a single innovative package. 

If you are powering 12 Volt DC equipment from a vehicle, marine, solar, battery, generator or other direct DC power source, the interVOLT SVCi241225G2 is the perfect companion product to ensure that it receives clean, stable power. Protect your valuable electronic equipment with a small investment in a power conditioner that will save you time, money and frustration. 

The GEN II range of interVOLT SVCi Isolated Maxi Voltage Converters & Power Conditioners are designed on the solid foundation of the original product with a host of new features and benefits. 

With digital over analogue topology the GEN II range allows the installer/operator to control and monitor various functions and provides valuable feedback on the status of the connected load. The GEN II is more compact due to multi-speed fan cooling and as a result no longer relies on convection for cooling. 

Galvanic isolation ensures there is no common connectivity between the input and output via positive or negative conductors. This means peace-of-mind when connecting sensitive and often expensive, high-end electronic equipment to the output. 

The benefits of using an isolated converter are many including elimination of line interference, greater protection, better regulation and improved performance. 

Popular mobile applications include in-vehicle, car, truck bus, boat, marine, aircraft, solar; Communications and radio equipment such as VHF, UHF, HF, AM, FM; Cellular phones including 3G, 4G, LTE, GSM, CDMA;  Personal computers including laptops, notebook, tablets; Navigation equipment including radar, sounders, GPS, plotters, etc; DC motors in applications such as winches, blowers, actuators.



The second generation interVOLT SVCi Maxi series isolated voltage converters are the evolution of the original and renowned SVCi models first released in 2003. 

The GEN II Series is not just a cosmetic ‘makeover’ but rather a complete new product from the ground up. The all new design features complete digital control with a specification second-to-none. Here are just a few of the features and benefits exclusive to the new range: 

  • Unique operator interface for control and monitoring
  • Galvanically isolated input to output – no common connectivity
  • Handy charge mode for charging a 12V auxiliary battery (2 stage)
  • High resolution voltage output of less than 0.5% under any load
  • Peak efficiency of 92% (better than 90% under most load conditions)
  • Remote operator control to turn unit on/off with signal current only
  • Multifunction alarm output for fault and pre-emptive warnings
  • Temperature and speed controlled internal cooling fan (ball bearing)
  • Compact design and can be mounted vertically or horizontally
  • Heavy duty termination with separate, removable terminal cover
  • 24 months warranty (subject to specific terms and conditions)
  • High quality assembly featuring marine grade hardware
  • Conformally coated printed circuit board assembly (tropicalisation)


intervolt products are designed for high demand power requirements and are suitable for powering a range of equipment including communications, navigation, monitoring, instrumentation, lighting, refrigeration, portable computers, pumps, compressors, solenoids, warning devices, CCTV cameras, security systems and many others.

intervolt SVCi’s incorporate a range of innovative features such as the industry’s first microprocessor controlled operator interface that helps trouble-shoot installation errors and resolve common problems.

intervolt SVCi’s are designed for the harshest applications and will operate in high temperature, high humidity environments. They are constructed of quality marine grade materials and are designed to provide many years of continuous service.

Innovative features. Rugged design. Simple installation. Peace-of-Mind.


See full product specification sheet on the Documentation tab.

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Proxicast is an Authorized InterVOLT Reseller


SVCi241225G2 Specifications
Output Voltage (Converter Mode) The voltage output is user selectable in 0.5V increments from 12.0V to 14.0V. The factory default is 13.0V which can be changed at any time.
Output Voltage (Charger Mode) Two stage battery charging mode with boost voltage of 14.4V and float of 13.6V.
Input Voltage Minimum start-up voltage is 20VDC but will allow input dip down to 17V during operation. Maximum input voltage is 33VDC.
Constant Rating All units are continuously rated at the published current under 40°C ambient temperature i.e. the 25Amp version is 25 Amps continuous.
Intermittent Rating All units have up to a 25% rating over the continuous rating at a maximum of 50% duty cycle for 10 minutes.
Momentary Rating All units peak at greater than 25% of continuous rating for a period of 5 seconds.
Power Efficiency Conversion efficiency varies depending upon load but minimum expected is 88% with a peak of 93%. Average is nominally 91%.
Standby Power With no load connected (idle mode) average current draw is typically 85mA. With remote isolation enabled the average standby current is less than 10mA.
Output ripple Less than 20mV peak to peak
Load regulation Less than 1% variation up to full load rating
Line regulation Less than 1% variation subject to voltage input min/max specification.
Environmental considerations Operating temperature range is -25°C to + 50°C and ideally humidity should not exceed 90%
Conformity Conforms to Electro Magnetic Compatibility (EMC) standards as follows: IEC61204?3 for low voltage power supplies, DC output, components EN61000-4-2 to EN61000?4?6 and AS/NZS CISPR 11 Group 1, Class B.
Construction Manufactured using corrosion resistant materials throughout, including anodised 6063 aluminium, ABS/PC plastics and stainless steel hardware. No ferrous materials are used and all PCB assemblies feature conformal coating (tropicalisation).
Safety Devices
  • Shutdown protection with automatic reset for input under voltage, output overload, output short circuit, over temperature and loss of negative reference using purpose built circuitry. All shutdown conditions are output to external source for remote monitoring.

  • Internal fuse protection (not user serviceable) for reverse polarity connection and output over voltage condition.
Alarm Devices
  • Pre-emptive warning for impending shutdown due to output overload, input under voltage and over temperature. All alarm conditions are output to external source for remote monitoring.

  • Failure warning of internal cooling fan due to obstruction, fault, damage, etc. Condition is output to external source for remote monitoring.
User Interface
  • Illuminated icons are used to display fault conditions for internal fan and temperature and various input/output conditions.

  • Status bar has dual use, to display operator selected voltage output in set-up mode and to indicate the percentage of load on the output in operation. On power up it will indicate the current voltage setting for a period of 10 seconds.
Auxiliary Connections
  • External Alarm Output – an external signal for remote monitoring of both the pre-emptive and shutdown alarms.

  • Remote Switching Input – used to isolate the output from the input with a simple, low current, control switch i.e. toggle switch.
Termination For input/output terminals the SVCi uses high current proprietary terminals with combination M5 fasteners. The control/monitoring terminal is a customized 2 gang Euro block. All in marine grade materials.
Warranty 24 month end user warranty
Length Overall 230mm
Width Overall 110mm
Height Overall 55mm
Weight 1150 grams


SKU: PWR-SVCi241225G2

UPC: 617237750785

  • Title: interVOLT 24VDC - 12VDC 25 Amp Isolated Maxi Voltage Converter & Power Conditioner - SVCi241225G2
  • Part #: PWR-SVCi241225G2
  • UPC Code: 617237750785
  • HS Code: 9032.89.20.00
  • Country of Origin: Australia
  • Shipping Weight (lbs): 3.000