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Foil Drive Assist Slim (Base Kit)

The Foil Drive Assist Slim (Base Kit) is a genuine Foil Drive electric foil assist kit. The Assist Slim is the lightest, performance-focused model designed to preserve the weightless and natural feel of foiling while still providing plenty of thrust and runtime when used efficiently.

£3,110.40

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Kit builder

Your kit^✶

Know what you’re getting!

01 Choose your battery

SelectedSlim Performance Battery x2+£518.40Two punchy, lightweight Slim batteries for short bursts of power to pop up.

RuntimePop-up bursts

Capacity: 2 × 166Wh · 40V
Weight: 1.19kg each
Installed: 3.5kg

In the box

2 × Slim Performance battery
LiPo bag

SelectedSlim Travel Battery+£488.40Splits into two smaller sections so it is approved for airline travel.

RuntimePop-up bursts

Capacity: 178Wh · 40V
Installed: 3.7kg

In the box

Slim Travel battery

SelectedSlim Endurance Battery (28v charger not included)+£388.80The larger Slim battery. It runs on 28V, so it needs the 28V charger, which is not included. Foil Drive are phasing it out in 2027.

Capacity: 241Wh · 28V

In the box

Slim Endurance battery

SelectedNo BatteryBase kitAlready have a compatible battery? Order the kit without one.

02 Choose your motor

SelectedRetro-fit High Power Motor Kit+£1,148.40Fits most masts with the tool-less Universal Mini Pod, so you can swap between masts in seconds.

Motor: High power V2
Cable: 20cm
Masts: ~95–145mm wide

In the box

Universal Mini Pod
Three-blade hub
Standard propellers
20cm motor cable
High-power stator and rotor
Fitting hardware

SelectedIntegrated Mast High Power Motor+£878.40For Foil Drive integrated masts, alloy or carbon. The puck and motor cable are built into the mast, which is sold separately.

Motor: High power V2
Mast: Not included

In the box

High-power stator and rotor
Three-blade hub
Standard propellers

SelectedRetro-fit Standard Motor Kit+£478.80The lower-cost way in, with the original Universal Motor Pod.

Motor: Standard V2
Cable: 30cm

In the box

Universal Motor Pod
Two-blade hub
Standard propellers
30cm motor cable
Standard stator and rotor
Fitting hardware

SelectedNo MotorBase kitAlready have a V2 Foil Drive motor? Order the kit without one.

Tap a card to choose it. Prices are what each option adds to the base kit. Runtimes are Foil Drive’s guide for an 85kg intermediate rider; yours will vary with weight, skill, kit and conditions.

Which one?

Compare^✶

Find your Foil Drive!

You’re hereFusionPower & runtime

Runtime45–90 min

Power37.5kg thrust

Weight5.7–8.0kg installed

Boost: 2368W
Sustained: 1850W
Platform: 43V Gen2.5
Batteries: F860, FM+ 650, FM+ 430

From £4,251.00View →You’re hereMAX+The all-rounder

Runtime45–65 min

Power35.5kg thrust

Weight5.3–6.7kg installed

Boost: 2152W
Sustained: 1750W
Platform: 43V Gen2.5
Batteries: FM+ 650, FM+ 430

From £3,310.80View →

You’re hereAssist SlimRide feel & performance

RuntimePop-up bursts

Power25.5kg thrust

Weight3.5–3.7kg installed

Boost: 1554W
Sustained: 1340W
Platform: 40V Gen2
Batteries: Slim Performance, Slim Travel

From £3,110.40

Runtime is Foil Drive’s guide for an 85kg intermediate rider, from heavy to light use, with the batteries available now. Bars are scaled to the most in the range. Installed weight includes the unit, battery and integrated high-power motor.

All the info just a click away

LEARN MORE. ✶

Foil Drive Assist Slim (Base Kit) ✶

The Assist Slim is the lightest, performance-focused model designed to preserve the weightless and natural feel of foiling while still providing plenty of thrust and runtime when used efficiently.

Built for riders who prioritise responsiveness, agility, pumping, and minimal drag, the Slim excels in short, powerful bursts to get on foil before transitioning to pure glide. Ideal for experienced riders who value balance, light weight, and reactive carving in surf, wake, windswell, and flatwater.

Weight and runtime by battery

Battery	Installed weight*	Runtime
Slim Performance (166Wh)	3.5kg	Short bursts to pop up; session time varies
Slim Travel (178Wh)	3.7kg	Short bursts to pop up; session time varies

*Installed weight includes the unit, battery, integrated high-power motor, three-blade hub, props and nose cone (if applicable). Runtimes are Foil Drive’s guide for an 85kg intermediate rider on a 5’0 40L board with an 800–1000cm² wing, in under 5 knots of wind. Yours will vary with weight, skill, kit and conditions.

Good to know

The Assist Slim stays on Foil Drive’s Gen2 40V platform. It does not share batteries with the MAX+ or Fusion.
Designed for short bursts of power to get up, then gliding. If you want long powered runs, look at the MAX+ or Fusion.
The Slim Endurance battery is being phased out by Foil Drive in 2027.

Specifications (from Foil Drive)

System Nominal Voltage: 40V
Battery Capacity Range: 166-241Wh
Dimensions with Battery: L510x W125 x H35mm
App Compatibility: Foil Drive App, Android and iOS
Water Rating: IP68 Water and Dust Resistance

What’s in the box

Your chosen battery and motor, plus a UK AC power lead, and:

Foil Drive Assist Slim
Motor Plug Protector with Keychain
40v Standard Foil Drive Charger 4amp
Nose Cone C
Nose Cone D
Universal Motor Pod – Rear
Universal Motor Pod – Short Nose
Universal Motor Pod – Long Nose
Universal Motor Pod Keys
V3 Wireless Throttle Controller
Controller Wireless Charge Pad and Micro USB Cable
Controller Wrist Strap
1x Mast Cable Guide 23cm each
2x Mast Track Foam Inserts
2x Nose Cone Rocker Pad
2x Battery Grease
Foil Drive Mounting Bolt Bag
- 4x M8 Locking Tee Nuts
- 4x M6 Locking Tee Nuts
- 4x M3 x 20mm Bolts for Locking Tee Nuts
4x M8 Assist Slim Mast Plate Bolts 60mm
4x M6 Assist Slim Mast Plate Bolts 60mm
Foil Drive 2.5mm Driver
Pick Tool
Torx T40 Tee Handle Driver
Torx T30 Tee Handle Driver
Foil Drive Cleaning Cloth
Foil Drive Gen2 Carry Case
Foil Drive Motor and Pod Bolts Bag
- 4x Motor Pod Bolts (M3 x 12mm)
- 3x Puck Bolts (M3 x 12mm)
- 3x Motor Plug Bolts (M4 x 10mm)
Spare Parts Bag
- 2x O-Ring Seals – Foil Drive Assist MAX
- 2x Latch Assembly – Foil Drive Assist MAX
- 3x Motor Plug Bolts (M4 x 10mm)
- 7x Motor Pod Bolts/Puck Bolts (M3 x 12mm)
- 4x Latch Locking Bolts (M3 x 16mm)
- 2x Propeller Bolts (M3 x 30mm)
- 2x Latch Pivot Bolts (M3 x 45mm)

Compatible with

Assist Slim
Slim Performance Battery
Slim Endurance Battery
Slim Travel Battery
28 OR 40 Volt Charger (Depending on Battery)

The technology

Weight

The lightest Foil Drive

A 1.09kg unit and about 3.5kg installed with the Slim Performance battery, so foiling keeps its weightless, natural feel.

Ride feel

Built for ride feel

Short bursts of power to get on foil, then pure glide. For proficient riders in surf, wake, windswell and flatwater.

In the case

Everything you need

Gen2 carry case with the V3 controller, 40V charger, three motor pod options, tools and a spare parts bag.

——— Related Products

Foil Drive Assist Slim (Base Kit)