
Electric Outboards for Inflatable Boats: Haswing Ultima 3.0HP Review
Considering an electric outboard for your inflatable boat? We dive into the Haswing Ultima 3.0HP, exploring its features, benefits, and how it stacks up against petrol alternatives for tenders and small inflatable catamarans.

The future of quiet, eco-friendly boating has arrived for inflatable boat owners.
For those of us who love the ease and versatility of an electric outboard inflatable boat, the choices have expanded dramatically in recent years. Gone are the days when electric motors were only for tiny tinnies or slow-paddling around the dam. Today, options like the Haswing Ultima 3.0HP offer genuine get-up-and-go for tenders and small inflatable catamarans, without the fuss of petrol.
At Easy Inflatables, we're always looking at the best ways to enhance your time on the water. While our Hidea 4-stroke outboards remain top-notch options for robust performance, we understand many of you are seeking cleaner, quieter alternatives. Let's unpack the Haswing Ultima 3.0HP and see if it’s the right fit for your inflatable adventures.
Why Consider an Electric Outboard for Your Inflatable Boat?
Petrol outboards have been the standard for decades, and for good reason – they offer high power-to-weight ratios and extended range. However, electric outboards, particularly for inflatable boats, bring a host of compelling advantages, especially for specific use cases like tender operations or quiet explorations.
Noise and Vibration
This is perhaps the most immediate and noticeable difference. Electric outboards are incredibly quiet. Imagine effortlessly gliding across a calm harbour or estuary with only the gentle ripple of water against your inflatable boat's tubes. This lack of noise is not just about peace and quiet for you; it's also less disruptive to wildlife, making it ideal for fishing or observing nature. There's also virtually no vibration, leading to a much smoother and more comfortable ride.
Environmental Impact
Electric motors produce zero direct emissions. No exhaust fumes, no oil spills (from refilling or minor leaks), and no noise pollution. This makes them significantly more environmentally friendly, which is a major draw for ecologically conscious boaties and for use in sensitive areas where petrol engines might be restricted or frowned upon.
Simplicity and Maintenance
Forget fuel filters, spark plugs, carburetors, and oil changes. Electric outboards are far simpler machines. Maintenance is generally limited to keeping the battery charged and ensuring connections are clean. This simplicity translates to fewer potential breakdowns and an easier life for the owner.
Portability and Storage
Without a fuel tank, oil, or complex engine components, many electric outboards are lighter and more compact than their petrol counterparts. This is a huge benefit for inflatable boat owners who often prioritise portability and easy storage. Lifting a lighter motor onto a transom or into a car boot is certainly much easier.
Instant Torque
Electric motors deliver instant torque, meaning immediate power delivery from a standstill. This can be surprisingly effective for manoeuvring, especially in tight spaces or when you need a quick burst of speed.
Haswing Ultima 3.0HP: A Closer Look
The Haswing Ultima 3.0HP is designed to offer a genuine alternative to small petrol outboards, making it particularly suitable for inflatable tenders, small fishing boats, and even compact inflatable catamarans like the AeroCat 330 or 360. It offers performance equivalent to a 3HP petrol engine, which is ample for many recreational activities.
Key Features and Specifications
- Power Output: Equivalent to 3HP petrol. Don't be fooled by the '3.0' – it's designed to deliver usable propulsion.
- Battery Integration: This is a standout feature. The Ultima comes with an integrated lithium battery, meaning no separate battery box or messy cables on your deck. This enhances portability and simplifies setup.
- Digital Display: Provides real-time information on speed and battery life, helping you manage your journey effectively.
- Variable Speed Control: Offers precise control over your speed, from a gentle crawl for trolling to full throttle.
- Lightweight Design: Weighing around 15 kg (including the integrated battery), it's significantly lighter than many petrol 3HP motors, enhancing manoeuvrability and transport.
- Quiet Operation: As expected from an electric, it's incredibly quiet.
- Run Time: This is always the big question. Run time will vary based on speed and load, but typically you can expect several hours at cruising speed, or an hour or so at full throttle. Given its integrated battery, for longer excursions, a spare battery or careful power management is essential.
Performance for Inflatable Boats
For a 2.3m to 3.6m inflatable tender or catamaran, the Ultima 3.0HP provides good performance. It will plane smaller, lighter boats (especially with just one person onboard) and comfortably push larger ones at hull speed. It's perfect for:
- Tender duties: Zipping from your larger boat to shore, carrying supplies, or ferrying passengers.
- No-wake zones: Its precise speed control makes navigating speed-restricted areas a breeze.
- Fishing: The quiet operation is a huge advantage for approaching fish without spooking them.
- Casual cruising: Enjoying quiet explorations of coves and waterways.
Petrol vs. Electric: What’s Best for Your Inflatable Boat?
Choosing between petrol and electric comes down to your personal priorities and how you intend to use your electric outboard inflatable boat.
Here's a comparison to help you decide:
| Feature | Electric Outboard (e.g., Haswing Ultima 3.0HP) | Petrol Outboard (e.g., Hidea 4-stroke 5HP) |
|---|---|---|
| Noise/Vibration | Very low to none | Moderate to high |
| Emissions | Zero direct emissions | Exhaust fumes, CO2, potential for spills |
| Maintenance | Very low (charging, cleaning) | Moderate (oil, plugs, filters, carb) |
| Fuel/Power | Integrated/external battery; charging required | Petrol fuel, refuelling required |
| Weight (approx.) | 15 kg (3HP equiv.) | 20-25 kg (3-5HP) |
| Range/Run Time | Limited by battery capacity | Limited by fuel tank capacity; easily extended |
| Torque | Instant | Builds with RPM |
| Cost (Initial) | Often higher due to battery tech | Generally lower for comparable HP |
| Complexity | Very simple to operate | More components, requires more user understanding |
| Environment | Highly eco-friendly | Less eco-friendly |
When a Petrol Outboard Shines
For longer distances, higher speeds, or situations where you need guaranteed extended run time without worrying about recharging, a reliable petrol outboard like our Hidea 4-strokes is hard to beat. If you're planning longer journeys up a river or regularly carrying heavier loads over distance, the increased power and range of petrol might still be your preferred option.
When an Electric Outboard is the Clear Winner
- Short to medium trips: Dock to shore, exploring local waterways.
- Noise-sensitive areas: Fishing, birdwatching, or just enjoying peace and quiet.
- Environmental concerns: If reducing your carbon footprint is a priority.
- Ease of use and maintenance: For those who want minimal fuss.
- Portability matters: Easy car topping or storage in an apartment garage.
- No-wake zones: Precise speed control is a huge advantage.
Battery Management: The Key to Electric Outboard Success
While the Haswing Ultima 3.0HP has an integrated battery, understanding how to manage it is crucial for a positive experience. Here are a few tips:
- Charge after every use: This maximises battery lifespan and ensures you're ready for your next outing.
- Monitor the display: Keep an eye on battery life to avoid being caught out far from shore.
- Consider a spare: If your typical trips are longer than the estimated run time at your desired speed, a second integrated battery can double your range.
- Store correctly: Follow the manufacturer's recommendations for long-term battery storage, usually meaning storing at a partial charge (around 50-60%) in a cool, dry place.
Outfitting Your Easy Inflatables Boat with Electric Power
Easy Inflatables offers a range of high-quality inflatable boats that pair wonderfully with electric outboards. Our AeroCat series (330, 360, 380) with their stable twin-hull design are excellent platforms for electric propulsion, offering reduced drag and efficient planing for lighter loads.
A WaveRunner 380 tender, with its robust build and comfortable ride, would also be perfectly suited for an electric motor, particularly for quiet harbour operations or as a primary tender.
And for the ultimate in premium build quality, the Aerowave Viper 1.2mm VALMEX series, while often paired with larger petrol engines, could also serve beautifully with an electric motor for specific, quieter applications, especially in its smaller sizes.
Regardless of your choice, durable, high-quality fabric is key to a long-lasting inflatable boat. Our VALMEX boats are designed for a 10-12 year lifespan, ensuring your investment stands the test of time, whether powered by petrol or electric.
Final Thoughts on Electric Outboards
The Haswing Ultima 3.0HP represents a significant leap forward for small electric outboards, providing a compelling option for those seeking a quiet, clean, and convenient way to power their inflatable boat. While petrol engines still hold the upper hand for raw power and unlimited range, the benefits of electric propulsion for tenders and small inflatable catamarans are becoming increasingly hard to ignore.
If you're in the market for an electric outboard inflatable boat setup, we encourage you to weigh up your typical usage against the advantages of both petrol and electric options. The right choice ultimately depends on your individual boating style and priorities.
Feel free to reach out to our team at sales@easyinflatables.com.au or give us a buzz on +61 2 4335 1603 if you'd like to discuss the best outboard options for your Easy Inflatables boat. We're here to help you get out on the water, your way.
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Not sure which suits you? Talk to a real boat owner.
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