Barnacle Zapper Ultrasonic Antifouling System

Barnacle Zapper Unit

Congratulations on the Purchase of Your New Ultrasonic Antifouling System. Barnacle Zapper’s Advanced Ultrasonic Antifouling is designed as an advanced protection system to destroy algae and prevent barnacle growth on your hull.

This device uses an advanced digital ultrasonic sound wave system and as such does not penetrate or interfere with the hull. Our system mounts to the inside of your hull using high quality mounting and bonding agent provided.

Due to our simple installation method, the system can be installed with the boat in or out of the water without any concerns.

Our system is the most advanced micro controlled digital ultrasonic system available. Once it is installed and turned on, the system starts to protect your hull immediately. Our system is made in Europe utilizing the highest quality components available from around the globe.

Please read and follow the instructions carefully. If you need additional information, you can email us at

The suggested steps for the installation should be followed:

  1. Planning
  2. Mounting the transducers
  3. Fitting the control module
  4. Running the power and transducer cables
  5. Connecting the power supply and transducer cables
  6. Turning the unit on

Package Content, Required Tools, Technical Specs

Package Contents

  1. Installation manual
  2. Control module
  3. Two transducers with cables
  4. Power cable
  5. Bonding glue
  6. Sandpaper and alcohol wipe

Tools Needed

  1. Phillips screwdriver
  2. Small flathead screwdriver
  3. Drill with 3/16″ bit
  4. Electrical plastic zip ties (~20)
  5. Wire cutter and stripper
  6. 2-way tape (heavy duty)

Technical Specifications

  • Power Supply Voltage 12V DC
  • Highest Power output: 40 watts
  • Average power consumption: 250mA @ 12V
  • Voltage of transducers: 250 volts (to 800V p-p)
  • Input voltage of the solar panel: 12v (to 22V)
  • Highest power output of solar panel 200 watts
  • Protection: Generator IP64/Transducer IP68


Exercise caution when working in areas of the vessel that are confined spaces. Especially when working near the bottom or “bilge” of the boat. These areas may contain residual fuel, fumes, or other toxic vapors that can be harmful when inhaled. Extreme vigilance should be used always but primarily when working alone in these areas. Prior to beginning the installation make sure the work area is properly ventilated. Drilling, sanding, and a basic understanding of the vessel’s electronic system are required for proper installation. The success and performance of your device depends on a quality installation.

Power Supply Protection


The installation of an in-line fuse should be placed between the battery and the control unit. The rating of this fuse should be based on the information below. If possible, the unit should be wired into the boat’s main circuit panel.

Power Source 12-24VDC

Red Wire (+) Positive

Black Wire (-) Negative

  • Two Transducer System – 5 Amp inline Fuse

Care should be taken to make sure that all of the electrical connections are secured and tightened properly.

STEP 1: Planning and Positioning

Prior to beginning the installation, it is important to plan out the steps for the installation; hull design, single or twin props, stern drives, inboard or pods, type of hull, targeted protection, transducer positioning, cable runs power supply and location of the control module. Deciding the layout of the installation requires answer to the following questions:

  • Where will the transducers be located? Positioning is critical as an incorrect position will greatly reduce the effectiveness.
  • Where will the control module be mounted? It should be a dry place above the water line. The length of cables for the transducers is also a consideration.
  • Where is the power source? The system needs a constant 12 volts power supply.

Hull Construction

Due to the nature of ultrasonic sound waves, it is critical that your hull be of a material that lends itself to the easy transmission of the sound waves. GRP (Glass Re-enforced Plastic or Fiberglass), Aluminum and Steel are the only materials that an ultrasonic antifouling system will work on. If your vessel is balsa/foam sandwich core construction, the top layer of the fiber glass must be cut and the foam removed so that the transducer can be mounted on the inside of the outer layer of fiberglass.

Hull Mounting

It is important to make sure that you’re bonding the transducers directly on the hull of the boat. Special care must be taken to ensure that they are not bonded to a false floor, cavity, over a keel, or on the inner layer of a balsa/foam cored boat. If working with steel or aluminum, be sure not to connect over welds or seams in the material.


Avoid mounting your transducers close to any large objects such as stringers, bulkheads, water tanks, fuel tanks and transoms. Ideally, you would be 12 inches away from these areas. Also, avoid mount the transducers close to any Depth Finder or Fish Finder.


We have included a diagram to show the general optimum areas for mounting the transducers. As every boat is different the illustration should be used as a general guide. Avoid placing the transducer close to the bulkhead or structural joints in the boat as these can reduce effectiveness if mounted t0o closely.

For boats up to approximately 30 feet

– depending on a twin engine or single or a stern drive or inboard. If a twin engine and stern drive, both transducers can be mounted approximately 8 inches off of the transom behind each engine. If a twin engine inboard, both transducers can be mounted just behind the propellers. For a single engine, mount 1 transducer close to the propeller and 1 as far forward as possible in the engine room.

For boats up to 59 feet–

we recommend 2 systems, 1 to protect the stern and 1 for the bow. Positioning of the stern transducers will follow the same as positioning listed for the smaller vessel. The positioning is 1 transducer just behind the bow thruster and 1 approximately 12” off of the center line on the opposite side of the boat.

For yachts over 60 feet –

there are no special issues just more underwater surface to protect. The actual size of the yacht and other features will determine the number of units needed and their placement. Each transducer is calculated to a 16 foot radius for ultimate performance.

STEP 2: Mounting the Transducers

Preparing the Surface for Transducer Mounting

The goal is to make 100% contact between the face of the transducer and the hull. The better you prepare the surface, the better the result. It is of utmost importance to prepare the location for the transducers correctly. This requires:

Sand Surface

  • A flat, clean surface that is free of any debris
  • A direct connection to the hull which may require removing any spacing or other layer such as a sandwich foam or balsa core.
  • Sand the surface using 60 grit sandpaper to remove the paint, gel coat and create a smooth surface.
  • Wipe down the area with the wipe provided, or acetone to remove any residue, dust or grease.


Mounting the Transducer to the Hull

It is very important that the face of the transducer remains in solid contact with the hull at all times. It is for that reason that we recommend bonding the transducer to the hull. While this will make it more difficult to replace or move a transducer should the need arise, it will allow the system to operate much more effectively. The bonding of the transducer will also prevent it from coming loose at any time due to environmental factors, such as engine vibrations, hull flexing etc.

1. Prepare the underside of the transducer mounting ring by sanding it until dull, using 120 grit sandpaper. When finished clean thoroughly with acetone. 2. Squeeze equal parts of the two part epoxy supplied. 3. Thoroughly mix the two parts together until the color is consistent. 4. Apply a good amount of the bonding agent to the prepared hull. 5. Apply the bonding agent to the surface of transducer and push it down into the bonding agent on the hull surface twisting right and left to ensure no air bubbles. 6. Use a quality tape, such as Gorilla tape to hold the transducer in place so that it will not move during the curing process. Allow 24 hours for transducer to bond with the hull.

STEP 3: Fitting the Control Module

1. A suitable mounting location for the control module should be above the waterline in a safe dry location, such as a storage locker.
2. Mark the location for the mounting screws using the template provided. Using a 3/16″ drill bit, drill the holes using caution to make sure that you are not drilling into the hull of the boat.
3. Unscrew the four Phillips head screws on the cover of the control module as shown below. These screws will not unscrew completely, as they are designed to stay with the cover. Remove the cover and place it aside.
4. The securing screws are placed in the same holes as the cover screws. Using the four screws provided secure the Control Module.

Barnacle Zapper cover removalBarnacle Zapper Control Box Opened Barnacle Zapper Control Mounting

STEP 4: Running Power and Transducer Cables

Now that you have installed your transducers and mounted the control module, it is time to run your cables from the transducers to the final location of the Control Module and connect them.

Our installation is designed for the running of cable to begin at the transducer and be routed back to the Control Module. Once the cable has been run, the excess wire can be trimmed prior to connecting it. Do not coil the excess wire as this can cause a magnetic field and disrupt the performance of the transducer.

When running your cables, where possible, keep them a short distance from other boat cabling. Secure the cabling using electrician’s zip ties.

STEP 5: Connecting the Power Supply and Transducer Cables

Strip back approximately ¼ inch of the rubber insulator and twist the strands tight. Feed the wires through the transducer nut on the control unit. Place the exposed portion of the wire into the connector as shown. Tighten down the wire using a small flat-head screwdriver. Now tighten the transducer nut hand tight. The cable should feel snug in the connector. Transducer connection

Locate your power source (12VDC).  This can be either a protected circuit from your boat’s electrical panel, or it can be directly from your battery.  If you are going directly from your boat’s battery, make sure to include an inline fuse with a rating of 5 amps. Beginning at the power source, start running your 12 VDC power cable back towards the Control Module.  Remember to leave the ringed terminal end at the power source.  Using electrical zip ties, secure the cabling to the boat as you proceed.  Once you arrive at the Control Module, trim off the excess cabling prior to connecting it.  Make sure to leave enough slack for connecting it.  

Place the cable through the connector on the Control Module and attach it to the 12 VDC J4 terminal inside.  The RED wire goes into the Positive (+) terminal, and the BLACK wire goes into the Negative (-) terminal as shown below. Tighten each connector using a small flat head screwdriver. Barnacle Zapper power connection

Place the cable through the connector on the Control Module and attach it to the 12 VDC J4 terminal inside.  The RED wire goes into the Positive (+) terminal, and the BLACK wire goes into the Negative (-) terminal as shown below. Tighten each connector using a small flat head screwdriver.

Once the wires are secure, hand tighten the connecting nut on the control module that the wire came through.  When done correctly, the wire should feel snug.

Make sure that the control module is turned off prior to making your final power source connection. Attach the ringed end of the cable at either the battery or electrical panel. Attach the control module cover at this time.  

STEP 6: Operation and Maintenance (Turning the Unit On)

With the control module closed, turn the switch to on. A bright Red LED diode  Power on  and Green LED diode  Operation on  will light up. The unit has been preset at the factory for optimum performance.

Power on- Red LED diode- Battery Power on
Operation- Green LED diode- Control Module and Transducers are working properly.
Low Voltage- Red LED diode- Voltage of the battery drops to under 10.5 volts. This will cause the system to turn off.
The Barnacle Zapper does not require any maintenance. You should however check the transducers periodically. They are working properly if you can hear a quiet clicking sound. If the transducer mounting ring unfastens from the hull, turn off the Control Module’s power switch and repeat the installation of the transducer.

Barnacle Zapper Fuses


If the device is not working, open the Control Module housing and check to see that fuses F1 and F2 inside the Control Module are intact. If you are unable to resolve the problem, please contact us We are here to help!

Enjoy your boat and your new Barnacle Zapper system.

Download PDF Manual HERE.