Most adaptable

ASIWO U1 Paddle Board Motor Reviewed in 2025

By: Nicolai Lonne & Bradley Axmith - Updated: August 2025

Asiwo U1 Paddle Board Motor Case Close Up

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About this guide

We gave our Gear Lovers one job:
Find the best and most popular products and review them.

Our review team always considers durability, price, quality, and value in their reviews.

Our review team:

Nicolai Lonne

Author and Co-founder at Boat & Sail Magazine

Nicolai's paddleboarding gets him on the water for Boat & Sail Magazine and for the joy of the sport.

Bradley Axmith

Editor at Boat & Sail Magazine

A weekend SUP tourer, his love for gear and the water is evident in his writing.

Disclosure: We are reader supported, and earn affiliate commissions If you find a good deal on Slope Magazine, you click to the retailer, and you buy the product, we get a commission of the sale. That's is how we pay ourselves. It does not make the product pricier for you. when you buy through us.

Where to buy ASIWO U1 Paddle Board Motor:

Amazon

As far as motorized paddle board kits go, there are only a couple basic priorities that make them good. The ASIWO U1 is one such electric motor attachment that hits the mark, for the most part. It has speed and it has one of the better remote controlling setups.

As the letter “U” indicates, the U1 is a universal motor that is designed for compatibility and versatility. Specifically, it’s an underwater scooter for freediving and scuba, too.

On the U1 product page, ASIWO lists the specs and includes a runtime of up to 80 minutes and a max speed of 12 km/h (equal to almost 7.5 mph). Along with its remote setup, this makes it a very interesting 2-in-1 engine and one which we enjoyed testing.

Things we like:

Great carrying case
Impressive top speed
Modular setup is simple
Attachable fin helps tracking and stability

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Things we don't like:

Battery runs down quickly when cruising fast

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Where to buy ASIWO U1 Paddle Board Motor:

Amazon

Specs & Features

Dimensions with regular battery: 5 x 12.7 x 15.5 in (12.6 x 32.2 x 39.4 cm)
Battery: Li-ion 180Wh
Runtime: 20 - 80 minutes (depending on speed mode)
Charging Time: 3-4 hours
Weight: 13.2 lbs (6kgs)
Speed: 9.6 feet per second (3 meter)
Motor Power: 1100 W
Depth Rating: 165 feet (50 m)

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See the complete list of the best Motorized Paddle Boards here!

User-Friendly & Performance Ready

Building on the popularity of the Manta underwater scooter, ASIWO launches the U1, 2-in-1 scooter/SUP motor.

If we get right to the experience on the U1, we found it to be pretty fast while tracking in a straight line.

Three speed levels, including low, medium and fast on the U1 SUP motor.

We can immediately heap praise on the carrying case and its two-sided design. So, the portability of the U1 is one of its unique designs and points of success.

Beyond the niceness of the case, the speed and experience on the water are on par with other leading SUP motors. In some cases, it excels beyond them.

With the fin attached to the engine and running at its highest speed, the 12 foot Explorer Pro by Isle clocked in at 3.8 knots with a 190 lbs rider (more about this below).

We found the battery lasted the longest and we got the most out of the experience running on low with some light paddling.

Straight tracking and easy controls on the wrist remote make for a pleasant paddle-assist experience on the ASIWO U1.

With the respectable speed, we also experienced pretty straight tracking. Whether it’s because of the fin, which counteracts the rotation of the blades, or because of the housing around the blades, it cruised almost as straight as the ScubaJet Pro.

All in all, as a SUP motor, the U1 is solid conversion kit with plenty of compatibility, great portability and impressive performance. A shorter battery time than expected using higher speeds was the only drawback, but this is common and not a deal breaker.

Above the $1,000 mark but good value in our experience and opinion.

1/2

The ASIWO U1 suitcase is portable and durable.

2/2

One side of the ASIWO U1 suitcase opens to reveal the paddle board engine and adaptors.

Electrifying a SUP with the U1

ASIWO claims that their U1 is compatible with 99% of all stand-up paddleboards. We have lots of different SUPs and all fin boxes that are available out there, so we could test this claim.

Pairing the watch controller with The ASIWO U1 SUP motor on a US Fin Box.

We did find every paddle board we tried was compatible, but we recommend checking your SUP anyway, before buying this.

The first time setting the modular pieces together might take a bit of time–at least 3 minutes. It does remind a bit of the ScubaJet Pro, with batteries screwing into the engine and prop.

A transmitter cable on the modular ASIWO U1 consists of a battery piece that screws together with the engine.

There’s a transmitter cable that needs to fit into the engine top, which then screws into the battery. The cable might fall out the first couple of times until the logic of it becomes clear. After that, it’s easy and fast.

The transmitter also doubles as the kill-switch connector. We like the low-profile of this setup, not taking up any space in the back cargo cords.

Fast Electrification on a Fin Box

Setting the engine on a fin box is fast once assembled. Flip the SUP over and use the right adaptor that comes with the ASIWO U1.

Setting up the ASIWO U1 on a fin box is pretty simple. Find the right adaptor and lock it in the same way you would any fin.

The final setup of the U1 with kill-switch and transmitter.

Once installed, flip over the board and attach the transmitter to a cargo cord or D-ring.

Wireless Control

Wireless control on a stand up paddle board is the way to go. Even when paddling in kayak mode, wired controls demand a hand, which we can ill-afford.

The transmitter of the ASIWO U1 is small enough to stay out of the way while providing wireless controls as well as the providing the kill-switch connection.

The U1 uses a watch controller, similar to the ScubaJet Pro and the Bixpy motors. ASIWO did a great job of designing the wireless controller, using a small antenna from the engine that doubles as the dead-man’s switch. It’s one of the better setups we’ve seen on this type of modular system.

The Asiwo U1 Watch controller next to a 45.5 x 45.5 mm Garmin G1.

How To Use the U1 on a SUP

If you have been considering buying a motor for your stand-up paddleboard, we recommend the ASIWO U1. At first gear, the stand-up board is gently pushed along, which we liked for children or those just wanting a little extra push of speed in the water. It functions very well as a motor-assist, like most electric bikes out there.

Gearing up to two and three, we were moving along with speed. The higher gear of course gives more power, so if there are multiple passengers on a larger board, like I was with my kids, the motor helped me to push us through the water.

As an Underwater Scooter

The ASIWO U1’s main selling point is its compatibility with SUPs, but they have made sure it isn’t just a one-hit-wonder. Thanks to its modular design, the U1 can convert into a handheld device. Inside the box, there are two handles and a buoyancy kit, similar to the Lefeet S1 Pro. During our latest trip, my kids particularly loved using the U1 when snorkeling or splashing in the hotel pool. With the addition of the buoyancy kit, the U1 effortlessly floats at the surface, so when they get bored and let go, the U1 won’t frustratingly sink.

Underwater adventures

We’re planning to take the U1 scuba diving in the fall. ASIWO claims that the U1 is waterproof to 165 feet (50m) so it can be used as a diver propulsion vehicle for deep diving in wrecks.

Considering the run time of the U1 is 20-60mins depending on the speed, it could drain during your dive. The U1 is 13 lbs (6kg), so carrying it for the remainder will be tedious, unlike the Lefeet P1, which has a scuba mount.