FAQ’s: Momentum U2 General

The U2 is suitable for many boats including tenders, sailboats, small workboats, fishing boats or as an auxiliary motor.

However, you really need to consider your use case before buying an electric outboard, whether you’re a first-time boater or making the switch from petrol.

We’ll go into a bit more detail about the key questions to ask yourself shortly.

There is the obvious environmental answer – electric outboard motors like the U2 produce zero direct emissions. There are no harmful pollutants such as carbon monoxide, nitrogen dioxide or particulate matter being pumped into the air or water.

With no need for petrol or oil in the motor, there’s no risk of any spills into the aquatic environment. Plus there’s the added benefit of no nasty smells or fuel spills in your boat or car!

Think about how noisy petrol outboards are – electric outboards deliver a completely different experience. With no engine noise or loud exhaust, the U2’s noise pollution is reduced to almost zero making boating much more peaceful and relaxing.

Then there’s the cost benefit. Yes, the upfront spend is more than buying a new or second-hand petrol outboard – but there’s no maintenance and running costs are way less. Electricity is often far cheaper on a per mile basis. You’re looking at pence not pounds to recharge and if you have access to solar power, then charging can potentially be completely free.

Momentum is a privately owned company based in Singapore, founded by a team of naval architects, engineers and designers with experience of building everything from warships to UAVs and a lot in between.

The Momentum company and design team are based in Singapore. They wholly own and control a factory in China where some parts are manufactured, and they have a team on the ground there so quality control is all in-house.

the motors have gained an enviable reputation for their engineering and build quality as well as their unrivalled performance in this user space.

Because the GPS receiver determines your speed over ground, it will accurately track and display your speed, distance and range regardless of whether you’re sailing or motoring – or both!

We’ll come back to you shortly on this one.

The custom-designed 2-blade propeller is made of a plastic composite – it’s incredibly robust!

The U2 motor and battery are both fully water proof and completely safe to use in the marine environment. Even if one or the other have been fully submerged in water – fresh or salt, you can pop the battery onto the motor, switch it on, attach the kill cord and head off.

The reason for this is that the team at Momentum designed both the motor and battery with self-cleaning connectors. When they marry up, they clean each other. A little rubber grommet cleans them, making sure there’s no water on the two connecting surfaces and then it sends a signal to the system saying everything is ok.

Yes – the both the battery and motor are waterproof and IP67 rated.

&list=PLpdhKTyL-WcLAw4eFfWYOToYcPP1Q5O6O” target=”_blank” rel=”noopener”>This short video by the Momentum team shows how safe it is to install the battery to the motor and switch on even after the battery has been submerged in salt water.

You’ll be able to travel greater distance and run the battery for longer by keeping your speed to around 3 knots.

On a super light tender such as the EZraft Q360, the Momentum team got just over 18 hours of run time and travelled 55 nautical miles in a test with one person on board motoring at a steady 3 knots in calm coastal waters. Increasing the speed by just one knot, endurance dropped to 3 hours and distance to 13 nautical miles. Gunning the motor at full speed (an incredible 9 knots!), they recorded 0.6 hours and 6 nautical miles.

Carrying out the same tests on a Takacat T300LX and a Highfield Classic 310 delivered a similar picture.

3 knots appears to be the most economical speed on all these different tenders and our own experience using the U2 to date reflects this.

There’s data from Momentum that shows the U2 lasted just over 18 hours and travelled 55 nautical miles (102km!) on one charge when travelling at 3 knots with one person on board an EZraft Q360 in calm coastal waters.

That’s pretty impressive – but the EZraft is an exceptionally light tender and, of course, how far you can go and how long a battery lasts will always depend on how fast you’re travelling on average, the type of boat you’re driving and how many people or how much kit you’re carrying.

In general, if you stick to around 3 knots, you should be able to get a full day’s motoring out of your U2 but as soon as you start increasing your speed – even by one knot – the battery endurance will rapidly decrease.

The U2 got up to 9 knots on the EZraft Q360 with one person on board in calm coastal conditions.

We’ll soon be uploading some tables showing more performance data on the EZraft as well as a Takacat T300LX and a Highfield Classic 310.

However speed clearly depends on the type of boat, the overall load – ie how many people on board and weight of kit being carried – and water/weather conditions.

You can absolutely get on the plane using the U2 on small lightweight boats such as the EZraft Q360, the Takacat T300LX and the Highfield Classic 310.

We’ll soon be uploading some tables showing performance with one person on board all of these boats.

We’ll be including links to independent reviews as they become available but in the meantime we suggest that you check out the Electric Outboard Instagram and/or Facebook feeds as they often post videos and reviews from customers.

We’re checking and if one is available, we will upload here very soon.

We’re checking and will upload one very soon if it is available.

We will be uploading a copy of the manufacturer’s manual very shortly.

We’ll be providing a detailed comparison of the U2 to other competing motors very soon.

There is a small slot built into the back of the motor, the slot acting as the carry handle on the battery and the spreader bar on the back of the transom mount. You can take a locking wire – so similar to a bike lock – and thread it through all those parts and secure with a padlock.

&list=PLpdhKTyL-WcLAw4eFfWYOToYcPP1Q5O6O&index=2″ target=”_blank” rel=”noopener”>This short video from the Momentum team takes you through this in a little more detail.

There is a two year warranty on the U2 package.

All warranty claims are managed by the UK distributor – Adventure Marine Ltd, trading as Electric Outboard.

Your first port of call should be the dealer who you bought your U2 from.

If they can’t help then they’ll refer you to Adventure Marine Ltd (trading as Electric Outboard) who are the sole UK distributors of the Momentum range of electric outboard motors

A full range of spares is held in their UK warehouse and they manage all warranty claims.

The battery capacity is 1.4kWh and at the time of writing (May 2026), a kWh costs around 25p so to charge it fully from dead flat will only cost around 35p at current rates – although this of course will vary over time depending on where Ofgem sets the price cap and the tariff charged by your energy provider.

If you have a cheap overnight rate, then the cost to charge the battery can reduce further and if you have solar power, then charging can be potentially completely free!

As the motor has few moving parts than a traditional combustion engine, and no fuel systems to worry about, there are no real maintenance or servicing costs.

We’ll be answering more fully soon but in the meantime &list=PLpdhKTyL-WcLAw4eFfWYOToYcPP1Q5O6O&index=2″ target=”_blank” rel=”noopener”>check out this short video created by the Momentum team.