SwellUP™ Inflatable Boat Cover Support System by Batten Down

Stop Water Pooling & Protect Your Cover with the Ultimate Inflatable Tensioner

Costs more than a pole. Does more than a pole.
SwellUP is the all-in-one solution for your boat cover headaches.

Inflates in 30 seconds to keep your boat cover tight, stop rain water pooling, circulates air, and keep your boat smelling fresh. No poles. No bailing. Just boating.

Are you tired of bailing water off your boat cover after every storm? Be honest… how well have those flimsy telescoping support poles or DIY PVC pipe frames really been working for you? They constantly fall over, puncture your cover, and leave you with hundreds of pounds of water pooling right above your expensive seats and electronics.

Say goodbye to the buckets, the busted poles, and the musty smells. Welcome to the last boat cover tension system you will ever buy: The SwellUP by Batten Down, now proudly available at Tiny Boat Nation.

The SwellUP is an innovative, patent-pending inflatable support system that evenly distributes tension across your entire cover. More than just a cover support, this system actively circulates air, fights mold and mildew, and deters pests—all with an incredibly simple 30-second setup.

Active Ventilation to Prevent Boat Mold, Mildew, and Pests

Key Features & Benefits

• Zero Water Pooling & No More Tipped Poles: SwellUP inflates into a massive, heavy-duty dome that keeps your cover tight and perfectly tensioned. Because it relies on volume rather than a single pinpoint pole, it won't tip over or punch holes in your cover during a storm.

• Active Air Circulation to Fight Mold: A stagnant, moist boat is a breeding ground for mold and mildew. SwellUP utilizes a continuous low-draw fan and built-in adjustable vents to constantly push fresh air out beneath your cover, keeping your boat smelling like a spa all off-season.

• Built-in Pest Deterrent: Wasps, spiders, and mice hate constant airflow, subtle vibrations, and minty smells. The SwellUP system delivers all three, including a built-in fragrance booster/air freshener, effectively creating a barrier against unwanted critters.

• Ultra-Low Power Consumption: This unit is insanely efficient. Equipped with a variable speed control dial, it draws as little as 3.2 Watts on its lowest setting and only ~25 Watts on max. It’s so efficient that you can easily run it off a small 12V battery and inverter, or a small solar panel setup—perfect for docks without shore power!

• Smart Magnetic Centering System: Stop guessing where the center of your support is! SwellUP includes an ingenious two-piece magnetic system. Place one magnet on the top of the inflatable and use the included magnetic ball on the outside of your cover to easily locate and pull the SwellUP perfectly into position.

• Complete 30-Second Setup: The entire system is built into a heavy-duty, self-contained storage box. Just place the box in the middle of your boat, plug it in, pull your cover over, and dial in the fan speed.

How It Works (4 Simple Steps):

1. Place & Plug: Open the SwellUP storage box in the center of your boat and plug the power controller into a standard outlet (keep the controller out of the rain).

2. Cover: Pull your boat cover over the deflated SwellUP and strap the cover down tightly.

3. Inflate & Align: Turn the power dial up to inflate the SwellUP. Use the provided alignment magnet on the outside of your cover to easily slide the support perfectly into the center of your boat.

4. Dial It In: Open the zippered vents on the sides of the inflatable to your desired airflow level, and turn the power dial down (typically to 1/4 power) to maintain the perfect amount of tension and ventilation.

What’s Included in the Box:

• (1) SwellUP Inflatable Cover Support & Storage Base Unit

• (1) Variable Speed Power Controller Dial

• (1) Magnetic Centering System (Internal Magnet + External Alignment Ball)

• (2) Scented Air Fresheners (Pest Deterrent)

• (1) Instruction Manual (Captain’s Orders)

Note: SwellUP is designed for stationary storage. We do not recommend towing your boat down the highway with the cover and SwellUP inflated.

Don't let another storm ruin your boat cover or flood your deck. Upgrade your boat storage with the SwellUP by Batten Down today!

Download Instructions Here