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Having trouble decide?  Check out our PSU comparison chart here

Once you have your machine and your displays a long with all of the other gadgets that you want for your carputer you will need some way to power it.

It all comes down to two options:

  • A power inverter
  • A DC-DC power supply

Your car's battery puts off 12 volts of DC electricity. Computers natively utilize DC power as well. Because most computers are used in the home or office, they must be able to convert the electricity that comes out of the wall (which is AC curent) to DC current. This is where you will need a power inverter to convert the DC current from the car to AC current that the computers power supply can utilize. Then the computer power supply converts the AC power back into DC power so that the computer components can utilize it. In short, if you choose to use a standard computer without a CarPC specific power supply you will need a DC-AC inverter.

Your other option is to use a DC-DC power supply (such as a M2-ATX) which will allow you to connect the 12 volt DC power from your car to your computer. Most DC-DC power supplies have other features such as an ignition switch which will turn your computer on when your car is started and will send a signal to go through a soft shut-down process or put the computer into stand-by or hibernation. Most of these DC-DC power supplies also incorporate an amplifier turn-on signal which is timed to not send a turn-on signal until the CarPC has alredy started the boot-up process. This feature is usually configured to prevent amplifier turn-on thump which can not only be very annoying, but can also damage your speakers.

To learn more about the various DC-DC power supplies, you can read in this fourm: PSUs. You can also purchase many of these power supplies here
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Mp3Car DSATX 220 Watt Automotive Power Supply
Mp3Car DSATX 220 Watt Automotive Power Supply
Our Price: $159.99
In Stock

Right out of the box the DSATX is very easy to use. It ships with the default easy to use configuration so that anyone can hook it up to their car system.
Carnetix CNX-P2140 165W Dual Output Intelligent DC-DC Regulator
CarNetix CNX-P2140 185W Dual Output Intelligent DC-DC Regulator
Our Price: $119.95
In Stock

The P2140 provides two outputs. The primary output is jumper selectable for 12V, 18.5V, or 20V operation and can provide up to 11.3 amps (135 Watts) @ 12V, or 7.5 amps (150 watts) @ 20V. The secondary output is jumper selectable to provide either +12V to power your LCD screen (or 13.5V or experimental purposes), or +5V to power USB devices with up to 3 amps (15 Watts). The P2140 can accept battery input as low as 7.5 volts under full load during cranking while providing a well-regulated output so that your mobile computer does not crash.

Mini-Box OpenUPS
Mini-Box OpenUPS
Our Price: $119.00
Sale Price: $117.95
You save $1.05!
In Stock

The OPEN-UPS was designed to provide user specified regulated power output from a wide input voltage, battery backup, multi-chemistry charging and cell balancing in a single PCBA. The unit automatically switches the power path in between Battery and Main DC input and provides buck/boost output regulation.
DC-Powered 4-Port USB Hub CNX-P5USB (12v and 24v systems)
DC-Powered 4-Port USB Hub CNX-P5USB (12v and 24v systems)
Our Price: $84.95
In Stock

The P5USB can be used in either a +12V or +24V automotive environment. It will operate down to 7V (survives engine cranking) and can withstand voltage transients typically found in a harsh automotive environment.
Carnetix CNX-P1900 Ver. 2.2 Dual Output 140 Watt 12V DC-DC Regulator
CarNetix CNX-P1900 Ver. 2.2 Dual Output 140 Watt 12V DC-DC Regulator
Our Price: $79.97
In Stock

The CNX-P1900 provides two outputs. The primary output is jumper selectable for 18V, 19V, or 20V operation and can provide up to 6.32 amps (125 Watts @ 20V ). The secondary output is jumper selectable to provide either +12V to power your LCD screen (or 13.5V or experimental purposes), or +5V to power USB devices (such as the Audigy 2NX sound USB sound card) with up to 3 amps (15 Watts). The P1900 can accept battery input as low as 7 volts under full load (140 watts) during cranking while providing a well-regulated output to ensure the stability of your CarPC.
192w AC-DC Power Adapter, 12v 16A
192w AC-DC Power Adapter, 12v 16A
Our Price: $79.95
In Stock

AC-DC 12V / 16A Switching Power Adapter (100/240V) Model: STD-12160
M4-ATX-HV 250W Intelligent DC DC PSU Power Supply Unit 6-34V Input
M4-ATX-HV 250W Intelligent DC DC PSU Power Supply Unit 6-34V Input
Our Price: $88.00
Sale Price: $79.95
You save $8.05!
In Stock

M4-ATX-HV is a wide input (6 to 34V) vehicle / car / battery operated ATX power supply capable of surviving tough car engine cranks (down to 6V) as well as transient over-voltage situations. Connect it to your car / boat / RV / solar battery and power up your PC! By using Patent Pending HyperWatt[TM] technologies
DSX12VD 140W DC-DC Regulator
DSX12VD 140W DC-DC Regulator
Our Price: $84.99
Sale Price: $79.95
You save $5.04!
In Stock

The DSX12VD is the deluxe version of the DSX12V. It is a 140 Watt DC-DC regulator that takes an input of 12 volts (8-16) and converts it to 12 volts out at 12 Amps. Includes an intelligent startup/shutdown controller as well as undercurrent/overcurrent and temperature protection.
M4-ATX 250W Intelligent DC-DC PSU
M4-ATX 250W Intelligent DC-DC PSU
Our Price: $88.00
Sale Price: $77.95
You save $10.05!
In Stock

250 watts of power and USB connectivity, in-car computing has taken a leap forward!
M2-ATX-HV 140W Intelligent DC-DC PSU
M2-ATX-HV 140W Intelligent DC-DC PSU
Our Price: $69.99
In Stock

The M2-ATX-HV is an intelligent, high power, vehicle (car / boat / electric cart) 12V DC-DC ATX PC power supply designed for car pc and battery powered applications.
DCDC-USB Intelligent DC-DC Converter with USB Interface and Metal Enclosure
DCDC-USB Intelligent DC-DC Converter with USB Interface and Metal Enclosure
Our Price: $69.95
In Stock

DCDC-USB is a high power intelligent DC-DC converter with metal enclosure. This unit accepts any input ranging from 6-34V. Output is 12V regulated or output can be changed with simple jumper settings to 5V, 6V, 9V, 12V, 13.5V, 18V or 24V or via USB in fine increments (0.25V) anywhere from 5-24V.

M3-ATX 125 Watt - Smart Automotive Power Supply
M3-ATX 125 Watt - Smart Automotive Power Supply
Our Price: $69.99
Sale Price: $64.99
You save $5.00!
In Stock

The M3-ATX is an intelligent, high power, vehicle (car / boat / electric cart) DC-DC ATX PC power supply designed for car pc or battery powered applications. Designed to provide power and to control the ON/OFF switch of a motherboard (car PC) based on ignition status, M3-ATX is a wide input (6 to 24V) vehicle / car / battery operated ATX power supply capable of surviving tough car engine cranks (down to 6V) as well as transient over-voltage situations. Just connect it to your car / boat / RV / solar battery and power up your PC!
M2-ATX 160W Intelligent DC-DC PSU
M2-ATX 160W Intelligent DC-DC PSU
Our Price: $69.99
Sale Price: $64.99
You save $5.00!
In Stock

The M2-ATX is one of our most popular power supplies The M2-ATX is an intelligent, high power, vehicle (car / boat / electric cart) 12V DC-DC ATX PC power supply designed for car pc and battery powered applications. Designed to provide power and to control the ON/OFF switch of a motherboard (car PC) based on ignition status, M2-ATX is a wide input (6 to 24V) vehicle battery operated ATX power supply capable of surviving tough vehicle engine cranks (down to 6V) as well as transient over-voltage situations. Just connect it to vehicle's battery and power up your PC!
Battery Pack For Lilliput 667GL-70NP/H/Y 4200 mAH 7.2V Pisen QM91D
Battery Pack For Lilliput 667GL-70NP/H/Y 4200 mAH 7.2V Pisen QM91D
Our Price: $64.95
In Stock

Works perfectly with the Lilliput  667GL-70NP/H/Y monitor to provide mobile monitor operations for up to 4 hours. 
Mini-Box DCDC-USB-200, Intelligent DC-DC converter with USB interface
Mini-Box DCDC-USB-200, Intelligent DC-DC converter with USB interface
Our Price: $63.95
In Stock

DCDC-USB-200 is a high power buck-boost microcontroller DC-DC converter. This unit accepts any input ranging from 6-34V.
Mini-Box picoPSU-120-WI-25, world's tiniest 12-25V input DC-DC ATX power supply unit (PSU)
Mini-Box picoPSU-120-WI-25, world's tiniest 12-25V input DC-DC ATX power supply unit (PSU)
Our Price: $64.95
Sale Price: $59.95
You save $5.00!
In Stock

The picoPSU-120-WI-25 is the smallest snap-in 12-25V  ATX dc-dc power supply. The picoPSU is compatible with an entire range of mini-itx motherboards as well as regular boards. The picoPSU-1200-WI-25 provides a cool, silent 120 Watts peak of power for small PC designs using a single 12-25V power source.
M3-ATX-HV 95 Watt - Smart Automotive Power Supply
M3-ATX-HV 95 Watt - Smart Automotive Power Supply
Our Price: $69.99
Sale Price: $59.95
You save $10.04!
In Stock

The M3-ATX is an intelligent, high power, vehicle (car / boat / electric cart) DC-DC ATX PC power supply designed for car pc or battery powered applications.
Intelligent DC-DC Converter with USB Interface
Intelligent DC-DC Converter with USB Interface
Our Price: $59.95
Sale Price: $58.95
You save $1.00!
In Stock

DCDC-USB is a high power intelligent DC-DC converter. 
Mini-Box picoPSU-80-WI-32V
Mini-Box picoPSU-80-WI-32V
Our Price: $59.95
Sale Price: $57.95
You save $2.00!
In Stock

Compact design, less cables. The picoPSU-80-WI-32 is the smallest snap-in 12-32V ATX dc-dc power supply. The picoPSU is compatible with an entire range of mini-itx motherboards as well as regular boards. The picoPSU-80-WI-32 provides a cool, silent 120 Watts peak of power for small PC designs using a single12-32V power source.
Mini-Box picoPSU-150-XT High power, 24 pin mini-ITX power supply in a small package
Mini-Box picoPSU-150-XT High power, 24 pin mini-ITX power supply in a small package
Our Price: $46.95
In Stock

Ultra-Compact design, less cables. The picoPSU-150-XTis the smallest plug-in 12V ATX dc-dc power supply. The picoPSU is compatible with an entire range of mini-itx motherboards as well as regular boards. The picoPSU-150-XT provides a cool, silent 150 Watts of power for small PC designs using a single 12V power source.
Mini-Box picoPSU-160-XT High power, 24 pin mini-ITX power supply in a small package (picoPSU)
Mini-Box picoPSU-160-XT High power, 24 pin mini-ITX power supply in a small package (picoPSU)
Our Price: $48.95
Sale Price: $44.50
You save $4.45!
In Stock

High Reliability design, less cables. The picoPSU-160-XT is the toughest plug-in 12V ATX dc-dc power supply. The picoPSU is compatible with an entire range of mini-itx motherboards as well as regular boards. The picoPSU-160-XT provides a cool, silent 160 Watts (200 watt peak) of power for small PC designs using a single 12V power source.
Mini-Box picoPSU-120, world's tiniest 12V DC-DC ATX power supply unit (PSU)
Mini-Box picoPSU-120, world's tiniest 12V DC-DC ATX power supply unit (PSU)
Our Price: $49.95
Sale Price: $43.95
You save $6.00!
In Stock

Compact design, less cables.  The picoPSU-120 is the smallest snap-in 12V ATX dc-dc power supply. The picoPSU is compatible with an entire range of mini-itx motherboards as well as regular boards. The picoPSU-120 provides a cool, silent 120 Watts of power for small PC designs using a single 12V power source.
Micro Shutdown Controller
Micro Shutdown Controller
Our Price: $41.99
In Stock

The uSDC or Micro-Shut-Down-Controller is an electronically controlled automotive power switching device. It is primarily designed for the purpose of starting up or shutting down a personal computer used in a motor vehicle. It interfaces with a computer motherboard's power switch header that would normally connect to the push-button switch on the front of a personal computer case.

Mini-Box picoUPS-120 ATV  DC micro UPS system / battery backup system for 12V automotive enviroments.
Mini-Box picoUPS-120 ATV DC micro UPS system / battery backup system for 12V automotive enviroments.
Our Price: $34.95
Sale Price: $33.95
You save $1.00!
In Stock

The picoUPS-120-ATV is a small yet powerful UPS (uninterruptible power supply) solution. The picoUPS-120-ATV was conveniently design to be compatible with quarter brick PSU standard (58 x 36mm).
Mp3Car Total Power Solution
Mp3Car Total Power Solution
Our Price: $29.99
In Stock

This is an innovative product that makes pairing your CarNetix CNXP2140 to Intel's D945GSEJT Fanless Motherboard a snap.  Plug one end into the output connector on the P2140. Plug the other end in to the included 3.5mm receptacle used to provide the on/off pulse to the motherboard.  Plug the final power plug directly into the motherboard power receptacle.  Quick release is now no problem.  
Mini-Box picoPSU-90, world's tiniest 12V DC-DC ATX power supply unit (even smaller than picoPSU-120)
Mini-Box picoPSU-90, world's tiniest 12V DC-DC ATX power supply unit (even smaller than picoPSU-120)
Our Price: $29.95
In Stock

Ultra-Compact design, less cables. The picoPSU-90 is the smallest plug-in 12V ATX dc-dc power supply. The picoPSU is compatible with an entire range of mini-itx motherboards as well as regular boards. The picoPSU-90 provides a cool, silent 90 Watts of power for small PC designs using a single 12V power source.
DCDC USB POWER BOX, For Use with Mini-Box DC-DC converter with USB Interface
DCDC USB POWER BOX, For Use with Mini-Box DC-DC converter with USB Interface
Our Price: $29.95
In Stock

DCDC USB POWER BOX
  • Enclosure for DCDC-USB, intelligent DC-DC converter with USB interface
  • Material: 0.8mm steel
  • Paint: black
Mini-Box picoUPS-100 12V DC micro UPS system / battery backup system
Mini-Box picoUPS-100 12V DC micro UPS system / battery backup system
Our Price: $29.95
Sale Price: $28.95
You save $1.00!
In Stock

The picoUPS-100 is a small yet powerful UPS (uninterruptible power supply) solution. The picoUPS-100 was conveniently design to be compatible with quarter brick PSU standard (58 x 36mm).
Xenarc MP-SC3 Power Cable Kit
CarNetix CNX-CA-XSC4
Our Price: $24.99
In Stock

This power cable kit provides a "plug-and-play" cabling solution for either the P1900 or P2140 and a Xenarc MP-SC3. No soldering is required. The kit includes both the power cable and ACPI cable for the Xenarc MP-SC3 with rear-panel access to the PC power button. Double check your PC to make sure it has this ACPI interface.
CNX-P5V 15 Watt +5V Regulator
Carnetix CNX-P5V 15 Watt +5V Regulator
Our Price: $24.95
In Stock

Upgrade your P1900 to include a 3RD regulated (+5V) output OR it can also be used as a stand-alone +5V/15 Watt Point Of Load (POL) supply
Mini-Box picoPSU-80, 80w output, 12v input DC-DC Power Supply
Mini-Box picoPSU-80, 80w output, 12v input DC-DC Power Supply
Our Price: $34.95
Sale Price: $22.95
You save $12.00!
In Stock

Ultra-Compact design, less cables. The picoPSU-80 is the smallest plug-in 12V ATX dc-dc power supply. The picoPSU is compatible with an entire range of mini-itx motherboards as well as regular boards. The picoPSU-80 provides a cool, silent 80 Watts of power for small PC designs using a single 12V power source.
Mini-Box Y-PWR, Hot Swap, Load Sharing Controller
Mini-Box Y-PWR, Hot Swap, Load Sharing Controller
Our Price: $29.95
Sale Price: $19.95
You save $10.00!
In Stock

Y-PWR is a 20A, 30V ideal diode OR. Two power sources such as AC/DC adapters of equal voltage can be used to sum (load sharing) the output power into a single, high power channel. This versatile device can be used as a Hot Swap, Load Sharing / High Availability or Power Patch Controller resulting in a low loss, high efficiency solution for AC/DC and/or battery solution.
Serial port for DSATX (Brainstem TTL to RS232 module)
Serial port for DSATX (Brainstem TTL to RS232 module)
Our Price: $18.85
In Stock

Mp3Car Description: This module is designed to provide a serial port control for the DSATX. It connects directly on the DSATX power supply and allows you to do things like tweak settings and monitor performance as well as update the firmware.

Factory Description: The new BrainStem connector. This connector plugs directly into a module and offers conversion from TTL to RS-232 levels. Included are indicator LED's for host serial power and stem logic power.

The interface connector has a female four pin connector on one end. On the other end is a female DB9 connector, which can plug into your Windows serial cable, or be used with the USB 1.1 to Serial Adapter which can be used with your Mac or Windows USB hub. The CTS and RTS lines are also connected and exposed although not used by the 4-pin BrainStem connector. These can be separately wired for other uses in your application.

M4-ATX USB Cable  3'
M4-ATX USB Cable 3'
Our Price: $10.99
In Stock

M4-ATX USB Link cable for using Ituner/mini-box USB software

Includes:
2.5' USB A Male to Male
6" M4-ATX pin header (GND, D+, D-, VCC) to USB A female
CNX-P1900 and CNX-P2140 Input/Output Replacement cables
CNX-P1900 and CNX-P2140 Input/Output Replacement cables
Our Price: $8.95
In Stock

This cable pack is a direct replacement for the stock 6-pin input cable harness and the stock 8-pin output cable harness for the CarNextix P1900 and P2140 regulators.
AC/DC Power Brick 120 Volt AC to 12V DC 1.2A
AC/DC Power Brick 120 Volt AC to 12V DC 1.2A
Our Price: $8.49
In Stock

  • AC/DC Power Brick
  • Input - 100v-240 volt AC  0.60A
  • Output - 12V DC 1200mA Center Positive
  • Made In China
Power Switch Cable- Jumper plug to bare wires
Power Switch Cable- Jumper plug to bare wires
Our Price: $5.99
In Stock

Power Switch Cable- Jumper plug to bare wires
Extra Monitor Power Cable
CNX Extra Monitor Power Cable
Our Price: $4.99
In Stock

The optional LCD monitor power cable let's you power your CarPC display from the CNX-P1900 and P2140 PSU +12 volt output. Just splice this cable in parallel with your CarPC power cable so that the CNX-P1900 or P2140 powers both units. The connector fits the Lilliput and Xenarc monitors or any other monitor with a 2.1 x 5.5mm power connector. Cable length is 6'.
CarNetix CNX-PJ-Kit Programming kit
CarNetix CNX-PJ-Kit Programming kit
Our Price: $4.95
In Stock

Primary output voltage programming jumper kit for the P2140. It will allow you to change the primary output to +13V, +14V, +15V, +16V or +17V.
Mini-Box SFX / ATX enclosure for M4-ATX
Mini-Box SFX / ATX enclosure for M4-ATX
Our Price: $3.95
In Stock

SFX / ATX enclosure for M4-ATX, designed to replace regular ATX PSUs. Turn any desktop in to a 12V power system.