DIY Instructions: Convert Two Saturn Paddle Boards Into an Electric Catamaran

This guide explains how to turn two inflatable paddle boards into a compact, lightweight electric catamaran using basic hardware, wooden crossbars, seats, and an electric motor.

1. What You Need

Boards & Structure

• Two inflatable paddle boards (same size and model for balance)

• Four wooden crossbars (treated wood, approx. 24–30" long depending on spacing)

• Stainless steel bolts or nylon straps for mounting crossbars

• EVA foam padding or rubber strips (optional, protects SUP surface)

Seating

• Two lightweight folding frame seats

• Mounting plates or wood boards under each seat (as seen in the picture)

• Ratchet straps or heavy-duty Velcro straps

Electric Motor System

Choose one of the following:

• Electric fin motor (simple)

• 12V or 24V electric trolling motor with:

  • Motor mount bracket

  • Marine battery or LiFePO4 battery

  • Waterproof battery box

  • Extension cable for throttle (if needed)

Hardware

• Stainless steel U-bolts, eye bolts, or strap loops

• Bungee cords for gear

• Zip ties, marine rope, and stainless screws

2. Board Layout and Spacing

1. Inflate both boards to full pressure.

2. Place them parallel, spaced 18–24 inches apart, depending on the width you prefer.

3. Align the noses and tails evenly so the catamaran tracks straight in water.

3. Install Crossbars to Connect Boards

The crossbars keep the boards locked together as a stable catamaran frame.

Steps

1. Position two crossbars in the front and two in the back—similar to the picture.

2. Use nylon straps, D-rings, or U-bolts to secure the crossbars tightly to the SUP D-rings.

3. Tighten until boards feel rigid and do not wobble.

4. Add foam/rubber padding under the wood to prevent SUP surface scratching.

Tip:

The tighter the crossbars, the more stable your catamaran will feel—especially with a motor.

4. Mount the Seats

1. Place each folding seat on top of a small wooden plate (as seen in the picture).

2. Strap the plate to the board using the side D-rings.

3. Make sure the seat is centered to avoid weight imbalance.

4. Confirm seat frames cannot shift when you lean back.

5. Install the Motor Mount

Using an Electric Fin Motor

• Attach one fin motor to each board OR a single fin motor on one board.

• Connect the battery in a waterproof box and run the cable up to your seat.

Using a Trolling Motor (more power)

1. Install a motor mount plate across the back crossbar.

2. The mount should extend slightly beyond the sterns.

3. Bolt the motor bracket to the plate.

4. Ensure the mount does not flex under load.

Battery Placement

• Place battery box behind the seat or under the rear crossbar.

• Strap securely so it cannot shift during acceleration.

6. Electrical Setup

1. Connect motor leads to the battery terminals (red to red, black to black).

2. Secure cables along the crossbars with zip ties.

3. Keep all electrical parts elevated and dry.

4. Test throttle response before launching.

7. Stability & Safety Check

Before using the electric catamaran:

• Ensure crossbars are tight

• Confirm seats are secure

• Verify motor and battery are immovable

• Check weight distribution is even between both boards

• Test power at low speed first

8. Launch and Enjoy

Once everything is secured:

1. Push the catamaran into shallow water.

2. Turn on the motor.

3. Start at slow speed to feel handling.

4. Increase power gradually and enjoy the smooth, stable ride.

The dual-SUP platform provides excellent stability, making it perfect for cruising, fishing, and exploring.