Aerofoils eFoil — frequently asked questions

Usually it's an empty or overheated battery, a loose data cable, or water ingress. Ride back to shore, open the battery compartment, and check the error message and connectors. If there's a water warning on the battery or drive unit, stop and contact support.

1. Carefully ride back to shore, open the battery compartment
2. Read the error message: 'Battery empty'/'Over temperature' (protective shutdown, let it cool down), 'Water ingress' (don't continue riding, contact support), 'Communication/drive error' (reconnect, otherwise contact support)
3. Check the data connector for a secure fit, remove water/dirt between the data cables
4. Check whether the remote reconnects to the board

Almost always stones, sand, or plant debris have gotten caught in the drive unit. First disconnect the battery completely, flush the drive unit with fresh water, and remove any foreign objects. If it persists, the impeller or stator is worn — replace it or contact support. Never work on the drive unit while the battery is connected.

1. Disconnect the battery completely: open the battery compartment, unplug the data connector, then the power cable (black/orange), remove the battery
2. Check the nozzle and impeller for stones/sand/twigs/fishing line, flush the drive unit with fresh water
3. No foreign object/damage found → clean or replace the impeller/stator, otherwise contact support

Rinse all components thoroughly with fresh water after every ride — this is mandatory after saltwater, otherwise salt will attack contacts and seals. Take the battery out, put the battery compartment into the drain position, and let everything dry completely before storing it. Never use high pressure or compressed air.

1. Lock the motor/turn off the remote, take the eFoil out of the water onto a soft surface
2. Open the battery compartment, disconnect the data connector + power cable, remove the battery
3. Put the battery compartment into the drain position (turn the latches 180°, lift the compartment, turn the latches back 180° → it clicks lightly into the open position)
4. Rinse all components with fresh water (rinse the battery separately per the datasheet); no high pressure/compressed air, no solvents/harsh cleaners
5. Let everything dry completely (including the deck pad + cavities), then store it

Before storing it, clean and dry all components and loosen the connections that were screwed together during assembly. Charge the battery to 20–30% and check its level every four weeks — it must never be deep-discharged, and never store it below -5 °C. Clean the electrical contacts and coat them with grease for protection.

1. Clean thoroughly (car cleaner is fine; no cold cleaners/rim cleaners/solvents), dry completely
2. Loosen the connections screwed together during assembly (wing/stabilizer/mast), rinse with fresh water, dry, lightly coat the screws with eco-friendly grease
3. Clean the electrical contacts with contact cleaner, protect them with waterproof grease/contact oil
4. Charge the battery to 20–30% (2 LEDs), store it cool/dry and separately, not below -5 °C
5. Check the charge level of the battery and remote every 4 weeks, recharge if needed; never let it deep-discharge

This is usually due to a lost pairing (often after a software update) or dirty contacts in the board. In the vast majority of cases, re-pairing plus checking the connectors solves it.

1. Re-pair: board assembled, battery compartment open → menu Settings > Pairing > Pair new board → follow the on-screen instructions (close/open/close/close the compartment) until 'Pairing successful' appears
2. Check the connectors in the battery compartment, clean the contacts if needed
3. Check the battery level of the remote and the board

Almost always the battery level is the cause. Charge the remote, check its charge level and the auto-shutoff setting in the settings menu. If it loses signal in the water, the remote or board was usually submerged too deep or for too long.

1. Turns off: check the battery level; adjust Settings > Battery Saving > Power Timeout
2. Won't turn on: charge it; after a long period unused, the charge indicator can take up to 15 minutes to appear (the start of charging is initially only confirmed haptically)
3. Signal loss in water: check the battery level of the remote and eFoil; don't submerge too deep/for too long

Take the eFoil out of the water immediately and dry everything thoroughly. Then check the battery compartment and mast seal for dirt and damage, and make sure the compartment closes completely and the battery sits cleanly and flush. If there's a water warning on the battery, contact support.

1. Check the battery compartment and mast seal for contamination (sand) and damage, clean carefully
2. Check that the compartment closes fully and the battery sits correctly and flush; check the clamping force of the latches; clean the battery's contact surface if needed
3. If the display shows 'Water ingress battery/drive': stop using it, contact support

No. Never continue using a dropped battery under any circumstances, and contact Aerofoils support immediately. Also don't keep operating it if power/data cables are damaged — contact support instead. A battery with internal damage can look fine on the outside and still be dangerous.

1. Take the battery/eFoil out of service immediately, stop charging it
2. Contact Aerofoils support and describe the incident; only continue using it after approval/replacement
3. If there's deformation/smoke: keep your distance, disconnect the power source, call the fire department; never extinguish with water

The remote shows Info (just notices), Warnings (performance may drop, e.g. throttling), and Errors (a problem that needs fixing). Overheating is fixed by cooling down; water ingress or communication errors need support.

1. Info (e.g. 'Motor locked', battery indicators): no action needed, or press button to unlock
2. Warning 'Battery low/critical': motor may shut off, head back to shore; 'high temperature': performance drops until it cools down
3. Error 'Overtemperature': cool down and try again; 'Communication/drive error': reconnect, otherwise contact support
4. Error/Warning 'Water ingress battery/drive/remote': stop using it, contact support
5. Soft reset (hold button > 10 s) only for unclear error displays

Before every session, do a visual check plus check that everything's securely attached and charged; rinse and dry after every session. Once a year or every 100 hours of use, check the sacrificial anode and mast play; every 300 hours, get a drive service done by a specialist.

1. Before every session: visual check of all parts, latches/levers move freely, charge levels, seals, torque + secure fit of wings/stabilizer/mast, connectors/cables
2. After every session: rinse with fresh water (battery separately), check battery compartment seal, dry, clean and grease screws/threads if needed
3. Yearly / every 100 h: check mast play, replace sacrificial anode
4. Every 300 h / several times a year: drive service + error log readout by dealer/support

You must always fully disconnect the battery from the eFoil first — otherwise there's serious risk of injury. Then disassemble the drive from the back (nozzle, stator, nut), pull off the impeller with the special tool, fit the new one and tighten it to the specified torque. This is only for technically experienced users.

1. Fully disconnect the battery (mandatory); never remove the nozzle with the battery connected
2. Turn the nozzle counterclockwise to remove it; unscrew the stator with the special tool; loosen the nut (hold with 4 mm hex key)
3. Pull off the impeller with the special tool: screw in all three M3 screws fully, then turn the middle screw until the impeller comes loose
4. Clean the parts, lightly grease the threads; tighten the new impeller with the M8 nut to 10 Nm; fit the (greased) stator and nozzle and tighten clockwise
5. Never start the motor without the nozzle; if in doubt, contact a specialist/support

Both jobs are due yearly or every 100 hours of use. Just unscrew the sacrificial anode on the drive and replace it — it protects against corrosion. Check mast play with the board fully assembled: if everything's in good condition, the mast shouldn't move noticeably.

1. Sacrificial anode (on the drive unit) every 100 h / yearly: remove the screw, fit a new anode
2. Mast play: assemble the board + drive, flip the board over onto a soft surface (EVA deck facing down)
3. Move the mast with max. 5 kg of force alternately 90° to the direction of travel — no noticeable play means it's fine; if there's play, contact support

If the damage could affect function or cause a leak, take the board out of service immediately and let it dry. Repairs should only be done by experienced professionals. Damage to the mast mount, battery compartment, or sealing surfaces is safety-relevant — contact customer service in that case.

1. If there's a risk to function or watertightness: stop riding, let the board dry
2. Have repairs done only by experienced experts
3. Damage to mast mount/battery compartment/sealing surfaces → contact Aerofoils customer service

Always charge the battery somewhere dry, away from flammable objects, and at 10–30 °C. Connect the power cables (black and orange) first, matching colors correctly, then the data cable. The charger blinks green and switches off automatically once the battery's full. Before every session, the battery should have at least 50%.

1. Dry location, kept away from flammables, 10–30 °C; check charger/cables/plugs beforehand, never use damaged parts
2. Connect matching colors: power cables (black/orange) first, then the data cable
3. Charging indicator blinks green; the charger switches off automatically once fully charged
4. Visual check before riding; charge the battery to at least 50%
5. Only use the original charger, don't charge at excessively high temperatures (fire/explosion risk)

Connect the USB charging cable to a USB power adapter and plug the charging connector into the remote's charging port. A charging bar appears on the display while charging. Before every session it should have at least 30% charge and shouldn't be left in direct sunlight.

1. USB charging cable into the power adapter, charging connector into the remote's charging port
2. Charging bar appears; the display goes dark, pressing a button shows the charge level; after a deep discharge it can take up to 15 min before it shows
3. Charge to at least 30% before riding; check for damage, make sure levers/buttons move freely; keep out of direct sunlight

Keep small metal parts away, never expose the battery to constant heat, and never open it yourself. Store it somewhere dry, away from flammables, at 20–30% charge. For transport, take it out of the board — it's hazardous goods and must not go into a pressure-sealed box.

1. Handling: keep metal parts away (short-circuit risk), no constant heat, never open/repair it yourself
2. Storage: dry, away from flammables, 20–30% charge (2 LEDs), check every 4 weeks, not below -5 °C, never fully discharge
3. Transport: remove the battery from the board, treat it as hazardous goods, don't put it in a pressure-sealed box (unless it's a special battery case)
4. If damaged/deformed/smoking: take out of service, never charge again, keep your distance, disconnect the power source, call the fire department, never extinguish with water

A defective lithium battery is hazardous material and never belongs in household waste. Take it out of service immediately, stop charging it, and store it dry, away from flammable materials, until disposal. You can drop off the eFoil, remote control, undamaged battery, and charger at your dealer free of charge.

1. Immediately take the damaged battery out of service, never charge it again, store it dry and away from flammable materials
2. Return the eFoil/remote control/undamaged battery/charger to your dealer free of charge; don't disassemble anything for disposal
3. If liquid/vapors leak out: don't touch, don't inhale, ventilate the area; if eye contact/symptoms occur → see a doctor, rinse skin immediately with water

All screws and threads must be clean and lightly greased, sealing surfaces free of sand. Attach the mast with four M6x20 screws in a crosswise pattern at 8 Nm, wing (three M6x30) and stabilizer (two M6x20) at 6 Nm. Check all components for damage before every session.

1. Place the board with the battery compartment closed (facing down) on a soft surface; clean screws/threads and lightly grease them; sealing surfaces/connectors free of sand, O-rings intact
2. Insert the drive unit into the mast mount (cable facing direction of travel), check the seal fit, attach the mast with 4x M6x20 crosswise at 8 Nm
3. Wing (3x M6x30) and stabilizer (2x M6x20) at 6 Nm; only remove protective caps shortly before riding

Open the battery compartment (lift the latches, turn 180°, open the lid up to max. 90°). Insert the battery flat and flush, first connect the power cables (black/orange) matching colors, then the data line until it clicks clearly. Close and lock the lid — an acoustic signal confirms the connection.

1. Open compartment: lift latches, turn 180°, open lid without force up to max. 90°
2. Insert battery flat/flush; connectors on the side where the mast cables exit
3. Cables must be clean/corrosion-free; first the power cable (black/orange), then the data line matching colors until it clicks; don't damage seals/plugs, don't kink them
4. Close the lid, press it down, turn the latches 180° and fold them over; an acoustic signal confirms the connection
5. Never bridge the contacts (risk of electric shock); never go into the water with the lid open; motor max. a few seconds dry

Practice every step on land first. Start in "Gonna Fly" mode with a limited power level and the motor locked, and wait for GPS. Ride lying down first, then kneeling, then standing — always with pressure on your front foot. Only once you're standing securely do you accelerate until liftoff. Always wear a helmet and life jacket.

1. Prepare: remote control on your wrist, 'Gonna Fly' mode, power level 3, motor locked, wait for GPS
2. Lying down: centered on your stomach, look forward, support yourself with your forearms; unlock the motor, meter the throttle lever, shift weight forward with speed
3. Standing up: at low speed bring your knees forward, plant your front foot, stand up with steady pressure
4. Liftoff: once standing securely at ~15 km/h, release pressure on the front foot to lift off, then immediately reapply pressure; keep the wing under water; start at max. 20 km/h; steering via body weight
5. Loss of control: release the throttle lever, jump off to the side (never forward), land clear of the board/wing/mast

Three riding modes: "Gonna Fly" for beginners (gentler acceleration), "Nice & Smooth" for intermediate riders, "Rocket Ride" for experienced riders. The power levels (1–10) limit the maximum motor output. As a starting point, roughly a tenth of your body weight is recommended as the level.

1. Select the riding mode on the start screen; 'Gonna Fly' is the gentlest (beginners)
2. Set power level 1–10 (limits motor output); starting point ~1/10 of body weight (e.g. 80 kg → level 8 or lower)
3. Immobilizer activates on a fall, 30 s of inactivity, power level 0, or button press; deactivate via button while board connection is active

Only ride in water at least 1.5 m deep, free of sand suction, obstacles, or strong currents — calm water and little wind are ideal for beginners. Always wear a helmet and life jacket, and don't go farther from shore than you're able to swim. If you lose control, release the throttle lever immediately and submerge the remote control.

1. Water: at least 1.5 m deep throughout, avoid sandy bottoms (impeller suction), watch for obstacles, avoid strong currents/tides; beginners: calm water + little wind
2. Protective gear: helmet + life jacket; avoid sharp edges on wing/mast/stabilizer; keep distance and follow right-of-way rules; rider weight max. 100 kg
3. Loss of control: release the throttle lever, submerge the remote control (stops the drive within milliseconds), jump off to the side (never forward), stay clear of the board/wing/mast
4. Check the weather before riding (avoid storms/rain/fog); observe local regulations (registration/insurance)

Just an informational notice: your remote control isn't currently connected to any board. Re-pair the board via Settings > Pairing > Pair New Board and follow the on-screen steps — the message will then disappear.

1. Mount the board, leave the battery compartment open
2. Select Settings > Pairing > Pair New Board in the menu and follow the four steps until 'Pairing Successful' appears

All good: pairing between the remote control and the board was successful, both are now connected. No further action is needed — you can head out once the startup process is complete.

1. No action needed — pairing is complete
2. If the message doesn't appear at the end of pairing, repeat the process (if interrupted, the previous pairing remains in place)

The motor is blocked via the immobilizer. To unlock it, press the corresponding button on the remote while it's connected to the board — the drive is then ready to go again. If unlocking doesn't work, in our experience it's usually the Speed Limiter, which blocks the start without a GPS signal from the remote.

1. Press the unlock button on the remote (board connection must be active)
2. The lock triggers automatically on a fall, 30 s of inactivity, or Power Level 0
3. In our experience: as long as the board is locked, you can still access reverse gear via the same left button — press and hold instead of a short press, then the remote beeps and shows a large "R" on the display; another short press engages forward gear again
4. If the board still won't unlock or the drive won't start, in our experience it's usually not the immobilizer but the Speed Limiter
5. The Speed Limiter caps the top speed and needs a GPS signal from the remote for that — without a GPS fix, the board won't start
6. Solution: turn off the Speed Limiter — or switch on the remote before the board, so it has time to acquire GPS outdoors

The drive battery still has about 50% capacity left — enough for more riding time, but half of it is used up. Keep an eye on your range and plan your way back to shore in good time so you don't get stranded with an empty battery.

1. Keep an eye on range, plan the way back to shore
2. The percentage shown refers to the board battery (the remote's battery is shown separately)

The board battery only has about 20% capacity left. That's enough for a short remaining ride, but you should head back to shore now. Don't ride further out, so you don't run out of energy in the middle of the water.

1. Head back to shore, don't ride further out
2. At 10% the 'Battery critically low' warning follows, after which the motor shuts off once the battery is empty

The remote's own battery is still about half charged — just a heads-up, no action needed. You still have plenty of reserve; simply recharge the remote after your session.

1. No action needed — recharge after the session
2. This indicator concerns only the remote, not the board battery

The remote's battery has less than two hours of charge left. That's usually enough for the current session, but charge the remote soon — if it runs out of energy, you'll lose control over the drive. Plan your way back.

1. Charge the remote soon, plan the way back
2. Below 30 min, 'Battery Remote critically low' follows along with a power-saving mode

The board battery only has about 10% left — the last reserve before shutdown. Head straight back to shore now and conserve energy by riding smoothly and steadily. Don't wait for the motor to shut itself off once the battery is empty.

1. Take a direct course to shore
2. Avoid full throttle/load spikes, ride smoothly
3. Once 'Battery empty' shows, the drive shuts off — then paddle back

The board battery is depleted and the motor shuts off to protect itself — you have no more propulsion. Stay calm, lie flat on the board, and paddle back to shore. This is not a malfunction, just the normal protective shutdown.

1. Motor is off, no propulsion — stay calm, lie flat on the board
2. Paddle back to shore or get towed
3. Charge on land, avoid deep discharge

The remote's battery only has less than 30 minutes left, so it switches into power-saving mode. End your session and head back to shore promptly — if it runs out of energy, you'll lose control over the drive.

1. End the session promptly, head back to shore
2. Charge the remote afterward (after a long period unused, the charge indicator can take up to 15 min to show)

The drive unit has heated up a lot, so the system throttles power until it cools down. Ease off and ride at a low power level, or take a short break. If the temperature keeps rising, the 'Drive System Overtemperature' message will follow.

1. Reduce power, ride smoothly and slower
2. Take a short break if needed, until the warning clears

The remote is at risk of overheating — usually from direct sun or heat buildup. Keep it in the shade or cool it briefly in the water to bring the temperature down. If it doesn't cool down, the 'Remote Overtemperature' error will follow.

1. Protect the remote from direct sunlight, let it cool briefly
2. Only continue riding once the warning clears

The battery is at risk of overheating and the motor shuts off for protection — you'll have no propulsion. Head back to shore and let the battery cool down completely before riding again or charging it. Don't force the ride.

1. Motor is off — head back to shore
2. Let the battery cool down completely in a shaded, airy spot
3. Only ride again or charge after it has cooled down

The system has detected water inside the drive unit. End the session immediately, take the eFoil out of the water, and stop using it — contact Aerofoils support. Water in the drive unit is a safety-critical issue.

1. End the session, take the eFoil out of the water, stop using it
2. Disconnect the battery and contact Aerofoils support

The drive unit has overheated, so the system stops it for protection. Let the drive unit cool down completely, then try starting again. If the error keeps recurring even after cooling down, check it for debris — otherwise contact support.

1. Let the drive unit cool down completely, then try again
2. If it recurs, check the nozzle/impeller for debris or stiffness
3. If the error persists, contact Aerofoils support

The remote has overheated and stops working for protection. Move it out of the sun, let it cool down completely, then try again. Going forward, don't store or charge it in direct sunlight. If the error persists, contact support.

1. Put the remote in the shade, let it cool down completely, then try again
2. Going forward, don't store/charge it in direct sunlight
3. If it recurs, contact Aerofoils support

The battery has overheated and shuts down for protection. Head back to shore, let it cool down completely, then try again. Don't charge or load it while it's still hot. If the error persists, contact support.

1. Head back to shore, let the battery cool down completely in a shaded, airy spot
2. Only try again after it has cooled down; don't charge/load a hot battery
3. If the error persists, contact Aerofoils support

The data connection between the battery and the board is disrupted. Reconnect the board (turn it off and on again) and check the connectors in the battery compartment for a firm, clean fit. If the error persists, stop using the eFoil and contact support.

1. Reconnect the board (turn it off and back on)
2. Check the data connector and contacts in the battery compartment for a firm, clean fit
3. If the error persists, stop using it and contact Aerofoils support

The drive unit is reporting an error. First try reconnecting the drive to the board — turn the board off and back on, and check the plug connections. If the error persists, stop using it and contact support.

1. Reconnect the drive (turn the board off and back on)
2. Check the plug connections in the battery compartment
3. If the error persists, stop using it and contact Aerofoils support

The system has detected water in the battery — this is a safety-critical issue. End your ride immediately, take the eFoil out of the water, and stop using it. Disconnect the battery, keep it away from anything flammable, and contact support right away.

1. End the ride immediately and take the eFoil out of the water
2. Do not charge/open the battery, keep it away from flammable material
3. Contact Aerofoils support immediately

The system has detected water inside the remote control. End your ride and stop using it, since the control unit may become unreliable. Dry it off on the outside, but don't open it yourself, and contact Aerofoils support to have it checked.

1. End the ride, stop using the remote control
2. Dry it off on the outside, don't open it yourself
3. Contact Aerofoils support to have it checked

First install the Aerofoils app from the App Store. Then on the remote control go to "Settings" → "Bluetooth" → "Pair new phone" (turn on Bluetooth first if needed) and scan the QR code shown on the display with the app. The app will confirm the connection — each QR code contains a unique key.

1. Install and open the Aerofoils app from the App Store
2. On the remote control: Settings > Bluetooth > Pair new phone (turn on Bluetooth via the slider if needed)
3. Scan the displayed QR code with the app; the app will confirm the successful connection
4. To pair another phone, generate a new QR code via 'Pair new phone' (each code has its own unique key)

The remote control has three screens: the start screen, the ride screen, and the board computer. To switch, hold down the button for 2 seconds each time. Current ride data (speed, time, distance, battery level) is shown on the ride screen, the full ride summary is in the board computer, and you choose the riding mode on the start screen.

1. Switch screens: hold the button for 2 seconds (start screen → ride screen → board computer); turning on takes ~3 s, turning off 5 s
2. Start screen: choose riding mode, board battery level in %; battery icon changes color below 20%, navigation bar turns red below 10%
3. Ride screen: power level (1–10), riding mode, speed, board battery level, ride time + distance
4. Board computer: ride time + distance, max./average speed, percentage of flight time, efficiency over the last 500 m and over the battery charge; press the button to scroll through the data sheets

Hold down the corresponding button for more than 10 seconds — this triggers the soft reset. Only use it when you get error messages that don't make sense, not as a standard fix. A soft reset doesn't delete any settings, it just restarts the remote control. If the error persists, contact support.

1. Hold down the corresponding button for more than 10 seconds → the remote control restarts
2. Only use this for unexplained error messages, not as routine practice
3. Don't confuse this with a factory reset: Settings > Reset > 'Delete all user settings'/'Factory reset' deletes the configuration (you may need to re-pair afterward)

The manual doesn't give a fixed range: ride time depends heavily on wind, current, wing choice, rider weight, speed, and flight height. Use the remote control's battery level as a guide — above 30% means more than 2 h, 10–30% means roughly 30 min to 2 h, below 10% means less than 30 min of ride time left.

1. Range/ride time: no fixed value; depends on wind, current, wing, rider weight, speed, flight height; board battery is shown in % on the start screen
2. E-SURFER real-world value: large battery, manufacturer claim up to 2 h / realistically ~1.5 h; light battery up to 1 h / realistically ~45 min (varies with weight, speed, conditions)
3. Board: 102 l, 1.76 × 0.72 × 0.18 m, approx. 9.5 kg
4. Drive: 6 kW peak (input), 4.5 kW continuous power, approx. 7.6 kg
5. Remote control: 191 g, 8 h battery life, 3 h charging time (0–30% in 30 min), IP68 up to 2 m, >500 charge cycles, sunlight-readable color display, floats
6. 1350 wing: 13 dm² / 0.95 m wingspan; 400 stabilizer: 4 dm² / 0.5 m; battery/charger details in the separate data sheets

The eFoil is designed for 0 °C to 40 °C and should only be used when in perfect condition. The rider must not weigh more than 100 kg. Avoid extreme weather like storms or heavy rain, as well as heavily polluted waters, and always ride at a safe speed suited to the conditions.

1. Temperature range: generally 0 °C to 40 °C (this only describes the product's capability; water sports remain dangerous in extreme temperatures)
2. Rider weight: max. 100 kg; the eFoil is not a means of transport and must not be used to tow people/objects
3. Weather/waters: avoid storms, heavy rain, rough seas, and polluted waters; check the weather (including changing conditions) before every ride
4. Choose a safe speed suited to the conditions (visibility, water, skill level); only use eFoils that are in perfect condition

Disassemble the eFoil by doing the assembly steps in reverse order. First disconnect and remove the battery, put the protective caps back on the wings, then loosen the wing, stabilizer and mast. The caps protect you from the sharp edges and protect the wings from damage during storage.

1. Disconnect the battery: open the battery compartment, disconnect the data connector, then the power cable (black/orange), remove the battery
2. Put the protective caps back on the wings (protects against sharp edges and damage)
3. Loosen the wing (3× M6×30), stabilizer (2× M6×20) and mast (4× M6×20) in reverse assembly order, pull the mast out of the mount
4. Place the board on a soft surface while doing this (e.g. board bag)

Always transport the eFoil in its dedicated transport bags and take the battery out of the board beforehand. That way all components are maximally protected and the eFoil stays easy to handle. When shipping the battery, also follow the applicable dangerous goods regulations — batteries count as dangerous goods.

1. Remove the battery from the board before transport (data connector, then power cable); the battery travels separately from the board
2. Pack the board, drive unit and accessories in their dedicated transport bags (board/drive bag)
3. Follow the applicable dangerous goods regulations when shipping the battery; don't put the battery in a pressure-sealed box (exception: transport/storage boxes designed for this purpose)
4. Store everything clean, salt-free and dry beforehand; rinse with fresh water after saltwater use before disassembling

The Audi e-tron foil is delivered in three packaging units: the battery, the board bag with the board, and the drive bag with the wing, stabilizer, drive unit, charger, tools and remote control. That gives you everything you need to assemble, charge and ride the eFoil.

1. Unit 1: Battery (own packaging)
2. Unit 2 (board bag): Board
3. Unit 3 (drive bag): Wing 1350 + M6×30 screws, stabilizer 400 + M6×20 screws, drive unit (mast), charger, T-wrench (TX30), L-Boxx Mini, charging cable + charging plug (remote control), remote control
4. Additionally: battery data sheet, charger data sheet, warranty booklet (data sheets are in the drive bag)

For the Audi e-tron foil, spare parts are available for the drive unit, board, wing, stabilizer and remote control — from the impeller to the latches and mast seal, to the leash and charging cable. If you can't find a part on the list, support can help; more accessories are available in the online shop or from your Aerofoils dealer.

1. Drive unit: nozzle/jet, stator, impeller, M8 nut
2. Board: latch (2×), latch holder (2×) + screws, mast seal, M6×20 screws (4×)
3. Wing/stabilizer: wing 1350 + M6×30 screws (3×), stabilizer 400 + M6×20 screws (2×)
4. Remote control: leash, charging cable; special tools: impeller puller, stator removal tool
5. Missing part → support (with order number); more accessories in the online shop or from the dealer

The status bar shows six icons: the clock (time), a lock (motor locked/unlocked), a warning/error icon (active info, warning or error), the Bluetooth icon, the GPS status, and the remote control's battery level. The color of the battery and Bluetooth icons additionally indicates their respective state.

1. Clock: current time. Lock: motor locked/unlocked (unlock via button when connected to the board)
2. Warning/error icon: active info, warning or error; meaning shown as plain text on the display or in the error table
3. Bluetooth: white = active, blue = connected to board; GPS: shows the GPS status
4. Remote control battery level: white = >30% (>2 h), yellow = 10–30% (30 min–2 h), red = <10% (<30 min)

In the vast majority of cases, the Speed Limiter is active. It limits the top speed and needs a GPS signal from the remote for this — without a GPS fix, the board simply won't start. This isn't a defect, it's intended behavior. Either you turn off the Speed Limiter, or you give the remote time to find GPS.

1. Check in the remote's settings whether the Speed Limiter is turned on — the GPS status is shown in the remote's status bar
2. Option A: turn off the Speed Limiter in the settings — after that, the board will start even without a GPS signal
3. Option B (keep the Speed Limiter active): reverse the order — turn on the remote first, then the board
4. This gives the remote time to find a GPS signal; wait outdoors with a clear view of the sky until the GPS status is stable
5. In our experience the most common support case for Aerofoils: many people suspect a defect in the board or the immobilizer, when in fact the system is just waiting for GPS
6. Indoors or between tall buildings, a fix often doesn't happen; under open sky it usually only takes a moment
7. If the board still doesn't start even with the Speed Limiter turned off and a working connection, contact Aerofoils support

Some mast play occurs over time and can usually be fixed by tightening the two upper mast screws to 10 Nm. To do this, you first need to open the controller cover and the controller, since the screws are underneath. If you don't feel confident doing this yourself, we'll do it for you.

1. Remove the battery before working on the board
2. Scratch the thread locker off the cover screw heads with a screwdriver
3. Loosen the four cover screws with a TX20, take the controller cover off the drive unit and set it aside
4. Loosen the four controller screws with a TX20, carefully set the controller aside — watch the cables, don't pull or kink them
5. Tighten the two mast screws underneath to 10 Nm each: one with a 5 mm hex key, one with a 4 mm hex key — use a torque wrench, don't just go by feel
6. Mount the controller with a maximum of 3 Nm
7. Sort the cables neatly so nothing gets pinched
8. Mount the cover with a maximum of 3 Nm — the 3 Nm is an upper limit, too tight will strip the plastic thread
9. Check the mast play afterward on the assembled board: the mast must not move noticeably
10. If play remains despite correct torque: stop and contact support, there's more going on then
11. Safety: don't ride with a noticeably loose mast — at speed the play can suddenly increase

There's a repair kit for this from Aerofoils: touch-up paint pens in the colors of the boards. You can use these to fix small paint chips yourself. To get you the right pen, we need two pieces of information: which board it is — Adventure or Performance — and which color.

1. Email us at support@e-surfer.com telling us which model you ride (Adventure or Performance) and which color needs touching up — then we'll tell you which paint pen fits
2. Before touching up: the spot must be clean, dry and free of grease; rinse off saltwater thoroughly beforehand and let it dry completely
3. Don't leave it too long: a paint chip is an open spot through which moisture can get in over time
4. Small paint chips are cosmetic and no reason to take the board out of service
5. It's different with deeper damage: cracks, damaged structure or possible water ingress aren't a case for the paint pen — contact support before your next session

You can only activate reverse gear when the board is locked — which happens automatically after every fall. Press and hold the left button on the remote until it beeps and a big "R" appears on the display. Then give throttle slowly and the board will move backwards. That's how you bring it back to you after a fall.

1. Requirement: The board must be locked — after a fall this happens automatically (immobilizer). Only then can you activate reverse gear
2. A short press of the left button is the normal lock/unlock function — for reverse gear, hold it long instead
3. Hold the left button until the remote beeps and shows a big "R" on the display — reverse gear is now active
4. Give throttle slowly: the board moves backwards and, from our experience, will start turning after a while — that's normal
5. Press the button briefly again: this engages normal forward gear
6. Once the nose of the board points towards you, give throttle slowly — the board comes back to you
7. Be deliberately careful with the throttle: you're steering a board with a running drive toward yourself