There is a version of foiling where you stop waiting. No paddling battles for waves, no wind minimums, no jet ski favors — just you, a quiet motor, and every session you used to miss.
So what is Foil Assist, exactly? Foil Assist is a compact electric motor kit that mounts on a hydrofoil board to help the rider take off and get on foil. Once flying, the rider releases the throttle and rides the wave, swell, or wind unpowered — the motor assists the takeoff, it does not replace the ride. That distinction is the heart of the category: an eFoil is powered riding; Foil Assist is powered access to natural riding.
This guide is the complete answer to what is Foil Assist: what a system is made of, how it works, what it weighs and roughly costs, how it differs from an eFoil, and who builds them — including where our own TakeOff Evo sits in the picture.
Key takeaways
- Foil Assist is an electric motor kit for foil boards that assists takeoff; you ride the wave or wind unpowered once flying.
- A typical system has four parts: a main unit with battery, a small motor with folding propeller, a mast mount or pod, and a wireless hand remote.
- Complete setups start around 4.5 kg — roughly half to a third of the weight of a full eFoil.
- Foil Assist works for surf foiling, wing foiling, downwind, flatwater pumping practice, and even light eFoil-style cruising.
- Systems with 97 Wh battery packs, like the TakeOff Evo Air batteries, can fly in cabin luggage on most airlines without special approval.
- The main brands as of 2026 are Manta Foils (TakeOff Evo), Foil Drive, and Duotone, alongside a DIY builder community.
What is a Foil Assist system made of?
A Foil Assist system is a kit you add to foil gear you already own. It does not replace your board, mast, or wings — it electrifies them. Four components do the work:
Main unit and battery. A slim waterproof housing, mounted on the board or mast, holding the battery and electronics. On the TakeOff Evo the main unit is 13 cm wide and takes swappable batteries from 194 Wh to 712 Wh.
Motor and propeller. A small electric motor sits on the mast, driving a folding propeller. The blades open under power and fold flat when you release the trigger, so there is almost no drag while you surf. The Evo motor delivers 3,500 W and 35 kg of thrust.
Mount. Either a universal pod that clamps to any mast, or an integrated mast with the motor built in for the cleanest possible setup.
Remote. A wireless hand throttle. Recent remotes add GPS session tracking, battery monitoring, and rider profiles.
[Image here: exploded view of a Foil Assist kit — alt: “Foil assist system components: main unit, battery, motor and remote”]
How does Foil Assist work?
The riding loop is simple, and it is why the category has grown so fast since the first commercial systems appeared in 2021–2023:
- Mount the kit on your existing foil board — a typical install takes minutes.
- Squeeze the throttle while prone or standing. The motor pushes you to takeoff speed and the foil lifts.
- Release and ride. The propeller folds, drag disappears, and you surf the wave, bump, or wind exactly as you would on an unpowered foil.
- Repeat. Missed the wave? Throttle back up. Want the next peak 500 m away? Motor over to it.
The motor typically runs seconds at a time, not continuously. That is why a 194 Wh Foil Assist battery can deliver a full session of wave riding, while an eFoil doing all the work needs 2–4 kWh. If you want the configuration details — batteries, chargers, propellers — see how a TakeOff Foil Assist setup is configured.
[Image here: takeoff sequence — alt: “How foil assist works — rider taking off with motor assistance”]
What is Foil Assist used for?
- Surf foiling — catch waves without paddling, get more waves per session, reach outside reefs.
- Wing foiling — fly in wind too light to ride, or learn without the frustration of failed water starts.
- Downwind — motor upwind to the start of a run, use the assist as a safety net to get home.
- Pump foiling — practice linking swells with a boost available when you fall off the energy.
- Light eFoil riding — with a bigger battery and the motor in the low position, a Foil Assist rides like a lightweight eFoil.
What is the difference between Foil Assist and an eFoil?
The short answer: an eFoil powers the whole ride; Foil Assist powers only the takeoff. As of 2026 the practical differences look like this:
| Foil Assist | eFoil | |
|---|---|---|
| Motor use | Seconds at a time, for takeoff | Continuous |
| Total added weight | From ~4.5 kg | Typically 25–40 kg complete |
| Feel on the wave | Unpowered, natural glide | Powered, throttle-controlled |
| Battery size | 194–712 Wh (Evo range) | 2,000–4,000 Wh typical |
| Air travel | Possible with sub-100 Wh packs | Generally not practical |
| Uses your existing foil gear | Yes | No, complete dedicated setup |
For a deeper breakdown — price, skills, range, travel — read the full eFoil vs Foil Assist comparison.
How much does a Foil Assist system cost?
As of July 2026, most complete branded Foil Assist kits land roughly between $3,500 and $7,000 depending on battery capacity, mast integration, and accessories — check current configurations in the shop for exact pricing. That is meaningfully less than a premium eFoil, mainly because you reuse the foil gear you already own.
DIY builds can come in cheaper. Plenty of riders enjoy that route, and it deserves respect. The trade-off is the one you would expect: a finished system is tested as a whole, fits properly, survives saltwater over time, and comes with support and parts when something needs attention. That is the product Manta sells — not a bag of components.
Who makes Foil Assist systems?
Manta Foils TakeOff Evo
The TakeOff Evo Foil Assist system is Manta Foils’ modular platform: one kit that runs 194, 388, 518 or 712 Wh depending on the batteries you clip in, from a 2.5 kg ultra-light setup (plus 2.0 kg motor) to a long-range configuration. The fully enclosed motor is maintenance-free, and the 97 Wh Air packs are designed for airline cabin luggage. It is the only system to date built around travel with multiple batteries.
Foil Drive
Foil Drive, from Australia, pioneered the commercial Foil Assist category and remains the best-known name in it. Its Assist MAX and Slim systems are strong all-rounders with a large user community. The design philosophy differs from Manta’s: fixed battery formats rather than a modular multi-battery platform.
Duotone Foil Assist
Duotone entered the category with a motor integrated into the mast and the battery worn on the rider’s waist rather than mounted on the board. It is a clean concept aimed primarily at wing foilers inside the Duotone ecosystem.
DIY foil assist builds
An active builder community assembles systems from off-the-shelf motors, ESCs, and battery packs. Cheaper, genuinely fun for tinkerers, and the origin of the whole category — with the reliability, waterproofing, and support trade-offs that come with self-built electronics in saltwater.
[Image here: TakeOff Evo kit with batteries — alt: “Manta Foils TakeOff Evo foil assist kit with modular batteries”]
Can you fly with a Foil Assist battery?
Yes — if the packs are under 100 Wh. Airline rules based on IATA lithium battery rules allow passengers to carry lithium batteries under 100 Wh in cabin luggage without airline approval. This is why the TakeOff Evo Air batteries are built as 97 Wh packs: you can travel with up to four of them per person on most airlines. Larger fixed batteries — including most eFoil packs — sit far above the limit. The practical rules, airline by airline, are in our guide to flying with Foil Assist batteries.
Is Foil Assist right for you? A quick checklist
If you are still weighing what is Foil Assist going to change for your riding, run through this list. Foil Assist is probably right for you if:
- You already foil — or want to learn — and miss more sessions than you ride because of conditions.
- You want more waves per session instead of more paddling per wave.
- You ride spots where the takeoff zone, not the wave, is the bottleneck: soft rollers, outer reefs, long paddle-outs.
- You travel and want your gear — batteries included — in the plane with you.
- You want one system that covers surf, wing, downwind, and flat-water practice instead of a separate toy.
- You prefer the natural, unpowered glide of real foiling over a throttle-in-hand ride.
If most of those are true, the next question is which system — and that comes down to weight, batteries, travel, and support.
Frequently asked questions about Foil Assist
What is a Foil Assist and how does it work?
A Foil Assist is a compact electric motor system mounted on your foil mast that helps you get on foil earlier and with less effort — in smaller waves, lighter wind, or with less paddle power. Once you are flying, you release the throttle and ride the wave’s energy like a regular foiler. It keeps the sport in the session; the motor just removes the hardest part.
Foil Assist vs eFoil — which one should I choose?
An eFoil’s motor does all the work, all the time — ideal for flat water, beginners and pure cruising. A Foil Assist helps you take off, then lets the wave or wind power the ride — ideal for surf foiling, wing foiling, downwind and prone riders who want more time on foil, not a different sport. Modular systems like the TakeOff Evo can do both: with a larger battery, the same kit rides as a full eFoil.
Is a Foil Assist hard to learn? Who is it for?
It is usually the opposite: a Foil Assist accelerates learning. It gets you on foil earlier and more often, which means more repetitions per session — the thing that actually builds skill. Riders use it to learn prone and wing foiling faster, to catch more waves per session, to ride in marginal conditions, and to keep progressing at any age or fitness level.
Can I fly with a Foil Assist battery?
Only if each individual battery pack stays at or under 100 Wh — above that, airlines require approvals that are rarely granted. This is the single most important spec for traveling riders. It is why Manta builds its batteries from individual 97 Wh sub-packs: each one is carry-on legal on its own, so riders regularly fly with two or three full sets per person, approval-free.
How much maintenance does a Foil Assist need?
It depends entirely on the motor design. Open motors (outrunners) need rinsing, lanolin spray and regular bearing changes — an after-every-ride routine. Sealed motors like the TakeOff Evo’s need none of that: a fresh-water rinse and you are done. If you are comparing systems, this is one of the biggest hidden differences in cost of ownership and time on the water.
Why Manta Foils builds Foil Assist systems
Every product decision behind the TakeOff Evo answers one question: what removes the friction between a rider and time on foil? Batteries you can fly with, because the best waves are rarely at home. A modular platform, because the rider you are in year two is not the rider you were on day one. An enclosed, rinse-and-done motor, because maintenance hours are not riding hours.
That is what Foil Assist means to us — not a motor strapped to a board, but the freedom to ride more often, in more places, on your own terms. When you are ready to see how the platform works in detail, start with the TakeOff Evo.
