MegaWatt Power Supplies 50 Amp, 36 Amp, 33 Amp, 9.5, 12, 13.8, 15 VDC

We at MegaWatt Sell High Quality Power Supplies for Ham Radio, CB Radio, Linear Amplifiers, Shortwave Radio and Audio Amplifies.

 Great RV Battery Chargers. They also work with RC Battery Chargers, Car Stereos or for the use or testing of any 12 volt electrical devices in your home or business.



30 amps 33 amp peak

15.5 VDC

Actual voltage adjustment on this unit is 9.5 to 15.5 VDC

Input 120/240 VAC





36 amps 41 amp peak

15.5 VDC

Actual voltage adjustment on this unit is 9.5 to 15.5 VDC

Input 120/240 VAC





50 amps continuous at 14 volts

Will run in parallel with as many units as you need for 100 amps or more.

Adjustable voltage 10-14 VDC Output 690 Watts

Input 120/240 VAC


Four S-700-12s Running at 200 Amps 14 Volts

Thank you,

John Marles

31700 Tick Canyon Road

Agua Dulce or Santa Clarita, CA 91390


Power Supplies

Built for HAM Radios but also
Great for LED Lighting

and RV Battery Chargers

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Don't Get Stuck With An Offshore Clone

Now all Power Supplies come with Double Ball Bearing 60,000 hour dust proof Cooling Fans


                                 See 4000 Reviews Here

S-700-12: 100 Amps 200 Amps 400 Amps or more

50 Amps Continuous at 10-14 Volts Heavy Duty DC Power Supply. Adjustable Voltage From 10 to 14 Volts DC Output 690 Watts. Great for 13.8 volt equipment, all MegaWatt Power Supplies are highly filtered and regulated.

The S-700-12 is modular. It will run In Parallel with other S-700-12s to produce any amperage you want. Two S-700-12s produce 100 amps continuous. You can run as many S-700-12s as you like for 100 amps 200 amps 300 amps.

Every time you add one it increases the output by 50 amps.

We also have the:

33 Amp and 36 Amp Heavy Duty Power Supplies. - Adjustable 9.5 to over 15.5 Volts DC Output.  Great for 13.8 Volt Equipment. Full Output is 15.5 Volts Not Just 12 Volts.

All our fans run full time to stop heat cycling which is the main cause of power supply circuit board failure. The S-350-12 and S-400-12 fan is a 10 db fan at 3 ft. The S-700-12 is a 30 db fan. See videos for an example. 

Over 175,000 Units Sold to Date

Purchase At The Bottom Of The Page

All power supplies come with a grounded power cord

If you have any questions please contact us at


                               MegaWatt Power Supply

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                   MegaWatt RV Battery Charger Reviews

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Our power supplies are highly regulated and filtered for use with Ham Radios, Marine Radios, CB Radios, Shortwave Radios and RF Amplifier equipment.

These units are designed for powering HAM radio equipment. The output section of the power supply is highly filtered to eliminate RF in the output voltage. Yes, it is possible to properly filter a power supply.

They have an extremely high output for their weight an size. Each unit is equipped with a cooling fan, automatic over voltage and short circuit protection. These units make no RF noise in your radio. 

Purchase at the bottom of this page.


The New S-700-12 has multiple parallel Connection Capability:

 Connect as many as you need together and the output will double , triple , quadruple or produce what ever amperage output you need. They can not be run it series. All power supplies comes with a grounded power cord.



We have been in business for over 18 years and  have sold 1000s of  power supplies to our happy customers.



S-700-12 Output

These Power Supplies also have many other uses. The S-350-12 and S-400-12 work great as onboard battery chargers for RVs, cars and trucks. Keep your car batteries fully charged and operate all your 12 volt equipment while parked. They will charge a low battery at full capacity and slowly ramp down the charge amperage to a 2 amp trickle charge as needed. Great for cars that are rarely driven.

They can be used to power LED lighting systems, RC Car, Airplane and Helicopter Mobile Battery Chargers in the house. They are widely used as LED Driver Power Supplies, Servo Control Power Supplies for CNC and Robotics or just prototyping and projects requiring 9.5 to 15.5 VDC power.


Both S-350-12 and S-400-12 power supply dimensions are 8 1/2in long X 4 5/8in wide X 2in tall and weighs 3 pounds.

The S-700-12 is 9.5in long X 5in wide X 2.75in tall and weighs 7 pounds.

 All power supplies come with a grounded 120 volt power cord and instructions.


You DO NOT need a PayPal account to check out

How to check out using PayPal with or without a PayPal account or get a shipping quote.

  1. Click the buy now button under the power supply picture, it may take a few seconds for PayPal the load.

  2. Enter how many power supplies you wish to purchase and press continue.

  3. If you don't have a PayPal account and don't want to get one please click the "pay with debit or credit card button"

  4. Enter the appropriate information and click pay now.

  5. For a shipping quote skip step four, pick your country at the top of the page. Fill in your billing address only and click the arrow by shipping method. This will give you the shipping price without actually making a purchase.



 $8.00 shipping to the USA

for the S-350-12 or the S-400-12

$15.00 for the S-700-12


If you are purchasing large quantities check with us for a shipping quote.


To check shipping costs to other countries click the buy button and enter your country.

Privacy: All information exchanged or received on this website is 100% protected and is never shared without written permission.


Thank for the support from

                               S-350-12 30 AMP 33 Amp Peak 9.5 to 15.5 Volts DC

UPC 683405633754



                               S-400-12 36 Amp 41 Amp Peak 9.5 to 15.5 Volts DC
                                                     UPC 685256290230



                   S-700-12 50 Amps Continuous Adjustable Voltage 10 - 14 VDC
                                               UPC 703510623126