Assist MAX is Foil Drive’s all-rounder foil-assist system, engineered to provide the ideal balance of thrust, runtime and versatility across a wide range of foiling disciplines.

MAX combines strong power, extended endurance and manageable weight to unlock:

• Longer surf sessions
• Reliable flatwater take-offs
• Easy upwind and downwind riding
• Extended assisted riding
• Continued progression across changing conditions

Whether you're surfing waves, winging, down winding, wake foiling or riding flatwater, Assist MAX is designed to do it all.

The MAX provides more thrust and runtime than the Slim, while remaining compact enough to maintain a responsive and natural foil feel.

Who is Assist MAX for?

Assist MAX is best suited to riders who want one versatile system that can adapt to different styles of foiling.

It is particularly well suited to:

• Riders under approximately 100 kg
• Small to mid-length boards
• Small to mid-sized foil setups
• Riders who want additional thrust for heavier riders or smaller boards and foils
• Riders who want longer ride times
• Riders who want flexibility across multiple foiling disciplines

Assist MAX is suitable for:

Surf • Wing • Downwind • Wake • Flatwater • Light eFoiling

Key Features

All-Round Performance

MAX is designed to balance power, runtime and weight, making it a versatile choice for riders who participate in multiple foiling disciplines.

It provides enough thrust to assist with challenging takeoffs while remaining compact enough to preserve the natural feel of foiling.

Strong Thrust

With up to 29 kg / 63.9 lb of peak thrust, Assist MAX provides additional power for:

• Smaller boards
• Smaller foils
• Heavier riders
• Challenging conditions
• Reliable flatwater starts

Extended Runtime

Assist MAX supports a range of battery capacities from approximately 332–594 Wh.

This allows riders to choose a lighter battery for minimum weight or a larger battery when runtime is the priority.

Maximum Versatility

MAX is designed to work across a wide range of conditions and disciplines.

Use it for a quick boost onto foil, extended powered sections, or to assist with challenging starts and conditions.

Key Specifications

*Minimum installed weight is based on the MAX Sport Battery configuration.

Battery Options

Assist MAX uses 40V batteries only.

The compatible battery range include:

Sport Battery (40V)

A smaller battery is ideal when the priority is:

• Lower system weight
• Maximum responsiveness
• Surf and wave riding
• Pumping
• Shorter assisted sessions

High Power Max Battery (40V)

A larger battery is ideal when the priority is:

• Longer sessions
• Downwind riding
• Flatwater
• Extended powered assistance
• Riders who need additional runtime

Max Travel Battery (40V)

• Airline approved for travel
• Only used as an assist 
• Cannot be used for e-foil or prolonged motor use

Choosing the right battery allows you to balance weight and runtime around your riding style.

Compatibility

Assist MAX is part of the Foil Drive Gen2 ecosystem.

The system must be configured using compatible:

• MAX Electronics Box 
• Nose Cone A and B
• MAX motor or compatible Integrated Mast
• Compatible MAX batteries (40V only)
• 40V Standard and Fast Chargers
• Compatible with V2 and V3 Controllers

Do not assume that batteries or chargers from other Foil Drive systems are compatible with Assist MAX.

Always check the voltage and compatibility requirements of the specific battery and charger before connecting them.

FAQs

What is Assist MAX designed for?

Assist MAX is Foil Drive's all-rounder foil-assist system, designed to balance thrust, runtime and weight across multiple foiling disciplines.

It is suitable for:

Surf • Wing • Downwind • Wake • Flatwater • Light e-Foiling

Who is Assist MAX best suited to?

MAX is best suited to riders under approximately 90kg using small to mid-length boards and their preferred foil setups.

It is also a strong choice for riders who want additional thrust for heavier riders, smaller boards or smaller foils.

How powerful is Assist MAX?

Assist MAX produces up to 29 kg / 63.9 lb of peak thrust, with a peak power-to-weight ratio of approximately 5.7 N/kg.

Peak power is approximately 1,854 W / 2.5 hp, with sustained power of approximately 1,455 W / 1.9 hp.

How much does Assist MAX weigh?

The minimum installed weight is approximately 4.8 kg / 10.5 lb when configured with the MAX Sport Battery.

The actual system weight will vary depending on the battery and motor configuration.

What batteries can I use with Assist MAX?

Assist MAX can be used with the following 40V Batteries:

- Power Battery

- High Power Battery

- Sport Battery

- Max Travel Battery

Choose a smaller battery when minimum weight is the priority, or a larger battery when longer runtime is more important.

Is Assist MAX an e-foil?

Assist MAX is primarily designed as a foil-assist system, providing motor assistance to help you get onto foil and extend your riding capability.

When using the High Power Battery, the Max system can be used as an e-foil alternative.

What is the water rating?

Assist MAX has an IP68 water and dust resistance rating.

Correct care, rinsing and maintenance are still essential after every session, particularly following saltwater use.

Can I use an Integrated Mast with Assist MAX?

Yes, where the Integrated Mast is compatible with the MAX system.

This can provide a clean, integrated installation while retaining the performance characteristics of the MAX system.

Which battery should I choose?

Choose the battery based on your priorities:

Lowest weight: Sport Battery

Maximum runtime: High Power Battery

To learn more about MAX batteries, see: Max Battery Overview

How does MAX compare with Slim and Gen2.5 systems?

Slim prioritises minimum weight, responsiveness, pumping and agility.

MAX provides more thrust and significantly more battery capacity than the Slim, making it better suited to riders who want longer sessions, more assistance and greater versatility across different conditions.

Fusion provides the longest run time, more thrust and sustained power across the whole voltage range of the battery. The Fusion is best suited to riders over 100kg or those wanting to use the system as an e-foil alternative.

Max+ keeps what you love about the Gen2 Max, but is packed with all the extra features of the Gen2.5, including more thrust, more battery options and safety features.

If your priority is minimum weight and natural foil feel, choose Slim.

If your priority is power, runtime and versatility, choose MAX.

If your priority is power, runtime, versatility and you're over 90kg, choose Fusion.

If your priority is power, runtime, versatility and you're under 90kg, choose Max+.

To compare our systems side by side, click here to see the Compare Page on the website.