BPS Marine 4 Transducer 24V Ultrasonic Antifouling System

Bottom growth is the price of leaving a boat in the water, and it costs you speed, fuel, and hours of scraping. The BPS Marine ultrasonic antifouling system takes a smarter approach than bottom paint. Instead of coating the hull with something that wears off and needs redoing every season, it uses ultrasonic energy to keep growth from ever getting a grip in the first place. This is the 4-transducer 24-volt system, sized for mid-size hulls and boats running 24-volt electrical systems.

Here's how it works. Four submersible transducers mount inside the hull, and the control module drives them with a multi-frequency ultrasonic sweep. Those ultrasonic waves create a microscopic moving pressure layer across the wetted surfaces of the hull, drives, and intakes. Barnacle and algae larvae need a calm surface to settle and attach to, and that constant ultrasonic agitation denies it to them, so the growth simply can't establish itself. It runs continuously and quietly in the background, protecting the boat 24/7 whenever the system is powered.

The four-transducer count covers a mid-size hull plus the critical running gear, hulls, drives, rudders, stabilizers, and water intakes. Those tucked-away surfaces are exactly where growth loves to hide and where hand-cleaning is the most miserable, so reaching them with ultrasonic protection is a big part of the value. Placing four transducers thoughtfully lets you cover the areas that matter most.

The advantages over traditional antifouling are what make it worth doing. There's no bottom paint, so no chemicals leaching into the water, no annual haul-out and repaint, and no toxic coating wearing off into your marina. It's genuinely eco-friendly, using ultrasonic energy rather than poison. And because it prevents growth rather than killing it after the fact, you keep a cleaner hull, which means better performance and fuel economy and far less time spent scrubbing. It's a set-and-forget approach to a job that otherwise never ends.

Power draw is modest for continuous operation. It runs on 24 volts and averages about 1 amp-hour, so it's a light load designed to run all the time. As with the rest of the BPS line, the system installs inside the hull, with the transducers bonded to the interior surface and wired back to the control module, so there's nothing hanging in the water and nothing to foul or damage.

It's worth understanding the payback over a few seasons. A boat that stays clean runs at its designed speed and burns less fuel, and you avoid the recurring cost and downtime of hauling out for a bottom job every year. Factor in the labor you'd otherwise spend, or pay someone else to spend, scrubbing a fouled hull, and an ultrasonic system genuinely earns its place. Install it once, let it run, and it quietly protects your investment year-round while you spend your time boating instead of scraping. For a mid-size boat on a 24-volt system, this four-transducer version is right-sized to do exactly that.

On a practical note, once installed the system is entirely maintenance-free, there are no anodes to replace, no paint to reapply, and nothing exposed on the hull exterior to inspect or damage. It simply runs, quietly protecting your hull season after season, which is exactly the kind of low-fuss reliability you want from marine gear.

Who's this for? Owners of mid-size boats on 24-volt systems who keep their boat in the water and are tired of the cost, hassle, and environmental downside of bottom paint and constant cleaning. If you want a clean hull, protected performance, and freedom from the yearly bottom job, an ultrasonic system pays for itself over time in saved haul-outs and fuel. This 4-transducer version is sized to protect a mid-size hull and its running gear properly. For larger boats, BPS offers 8-transducer systems that cover more wetted surface.