Coast — Regenerative Skateboard Deck
A longboard with a regenerative-braking hub that turns your downhill runs into power for your phone, headphones, and bike lights. The first skateboard that's also a wearable battery you don't have to wear.
Snapshot
Feasibility at a glance
PT localization
8/10
High
The whole build can be sourced in Portugal.
Per unit
€340–€520 per deck
at 400-unit volume
Starter batch
400units
minimum viable run
To first batch
20weeks
6 phases, design to ship
Budget
€136K–€291K
all-in estimate
Bottom line
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Picked based on the localization score (8/10) plus the dominant process (cnc machining). For an early build at this batch size, this gives you the best balance of cost, risk, and speed of iteration.
What it does
4 capabilities
Lets you ride exactly like a normal longboard — no learning curve.
When you brake, the rear wheel runs as a generator and slows you down.
Charges your phone through a sealed USB-C port near the back truck.
Lights up automatically at dusk so cars see you on the sea-front road.
How it's made
4 stations · build route
- 1
Lay the deck
Eight-ply maple plus a flax outer skin for stiffness without harshness.
- 2
Build the hub motor
In-house wound stator, custom rotor with embedded magnets.
- 3
Pack the cells
Spot-welded 21700 nickel strips, BMS supervised, potted in epoxy.
- 4
Tune the brake
Test riders on a closed hill until the brake feels analog, not jerky.
Lay the deck
Eight-ply maple plus a flax outer skin for stiffness without harshness.
Build the hub motor
In-house wound stator, custom rotor with embedded magnets.
Pack the cells
Spot-welded 21700 nickel strips, BMS supervised, potted in epoxy.
Tune the brake
Test riders on a closed hill until the brake feels analog, not jerky.
Risks to watch
3 identified · 2 blocking
High
Battery transport / safety certification
UN 38.3 testing is non-negotiable and slow.
Mitigation — Book the test slot at the same time as the EVT build, not after.
High
Cell mismatch causes thermal events
Reclaimed-energy systems push cells harder than they would see in a phone.
Mitigation — Match cells within ±2% IR; thermistor every cell group; passive cell-balancing.
Medium
Brake feel disappoints riders
If the regen brake feels jerky, riders won't use it and the whole value prop collapses.
Mitigation — Tune torque ramp on a closed hill with at least 5 test riders.
Production timeline
20 weeks to first batch
CNC machining
wk 1–2Composite lay-up
wk 3Motor winding
wk 4Battery pack assembly
wk 5Anodising
wk 6Functional QA & batch sign-off
wk 7CNC machining
Composite lay-up
Motor winding
Battery pack assembly
Anodising
Functional QA & batch sign-off
wk 1–2 is the longest stretch — CNC machining takes 2 weeks of the 7 weeks on this build.
What goes into it
6 materials · 6 processes
Materials
Processes
Design philosophy and best practices
5 principles
A regenerative electric skateboard must be strong, light and safe while recovering energy when braking. The deck, motor and battery must work together with good protection.
1
Design the deck for flex and fatigue
Maple and flax layers give flex, but must take repeated loads. Test cycles and impact.
2
Protect the battery
21700 cells need a battery management system, fuse and enclosure that resists impact and water.
3
Limit regenerative braking
When the battery is full, braking energy has nowhere to go. The controller must handle this safely.
4
Seal the hub motor
Hub motors face water and grit; sealing and heat dissipation matter.
5
Plan for rules
Light electric vehicles and their batteries fall under EU rules, including EN 17128 for personal light electric vehicles.
Common pitfalls
Avoid
Battery packs cracking from deck flex.
Avoid
Regenerative braking failing on a full battery.
Avoid
Wheels or trucks loosening from vibration.
Avoid
Underestimating heat in the motor on long hills.
10-year evolution forecast (2026-2036)
4 phases
Light electric vehicles keep growing in cities. The points below are trends.
2026–2028
Safer batteries
Trend: stricter battery safety and transport rules.
2028–2031
Bio-based composites
Trend: flax and natural fibres in boards and frames.
2031–2034
Repairable designs
Trend: EU right-to-repair pushes for replaceable batteries.
2034–2036
Battery recycling
Trend: EU battery regulation increases recycled content.
Outlook
Expect safety, repairability and battery quality to matter most for buyers.
Materials intelligence
7 materials
Maple veneer
Low supply risk
Deck core
Sourced from: Hard maple comes mainly from North America.
Flax fibre
Low supply risk
Composite layers
Sourced from: Flax is grown mainly in France, Belgium and the Netherlands.
Aluminium alloy
Low supply risk
6082-T6 trucks
Sourced from: Primary aluminium is led by China, with smelters in Norway, the EU and the Middle East; bar and plate are widely stocked in Europe.
NdFeB magnets
High supply risk
Hub motor
Sourced from: China dominates rare earth processing and magnet output.
Lithium-ion / lithium-polymer cells
High supply risk
21700 battery cells
Sourced from: Cell production is dominated by China, South Korea and Japan; EU cell capacity is growing but limited.
Shipping follows UN 38.3; EU battery rules add labelling and recycling duties.
Polyurethane
Low supply risk
Wheels
Sourced from: Made in Europe, the US and Asia.
Copper
Medium supply risk
Motor windings and wiring
Sourced from: Mined mainly in Chile, Peru and DR Congo; Portugal mines copper at Neves-Corvo.
Prototyping and rapid manufacturing in Portugal
5 companies from the atlas
Onlybattery
Distribution centre Rua da Mata 72, Nogueira da Maia (Porto), NUTS2 Norte
Battery pack assembly
21700 battery pack prototypes.
Celorico de Basto
CNC machining and anodising
6082 trucks and baseplates.
Vila do Conde
Motor production with welding and soldering
Hub motor wiring and assembly.
Marinha Grande
CNC machining and sheet metal
Motor mount plates and deck brackets.
Oeiras
CNC machining and anodising
Small batches of machined parts.
507 Portuguese manufacturers matched
None cover the whole build — it splits across steps.
Shortlist
507 matched · 8 shown, ranked by coverage
Services each manufacturer can handle for this build.
Manufacturer
Location
Covers
Certifications
People
PT18 — **Évora (Alentejo)** — combined site ~500 employees
—
—
PT18 — **Évora (Alentejo)** — ~5 km from Embraer/Aernnova plant
—
—
PT11 — **Santo Tirso (Norte)**, Ermida industrial zone
—
—
PT16 — **Marinha Grande (Centro)** + UK / CN / BR / SE engineering offices
ISO 14001
1400
Registry coverage
Portuguese producers per required step
Final Assembly
369
CNC Machining
212
Composite Layup
15
Battery Pack Assembly
3
Anodizing
3
Motor Winding
0
Depth
How many cover more than one step
The gap
Picked based on the localization score (8/10) plus the dominant process (cnc machining). For an early build at this batch size, this gives you the best balance of cost, risk, and speed of iteration.
Send one RFQ to the top 4
Almadesign, EDISOFT, Embraer Portugal Estruturas Metálicas, Mecachrome Aeronáutica — same package, one click.
The plan
9 tasks · 30 weeks to first batch
Week 1
2 tasks
Lock the pilot scope to one variant
One material set, one feature set, one user persona. Anything else is roadmap, not pilot.
Shortlist three vendors per critical step
Use GETMILK Match to pull a ranked list across the top three processes — cnc_machining, composite_layup, motor_winding. Send the same RFQ to all three; do not customise per vendor yet.
Weeks 2–3
2 tasks
Freeze the design for the first 10 units
Move the active CAD set to a tagged release; any change after the freeze gets logged in the change-board.
Place first-article orders with two of the three vendors
waits on Vendor shortlist signed off
Order one of each critical part at full spec. Do not buy 100 — buy 1, inspect, learn, then buy 100.
Weeks 4–7
2 tasks
Run the integration pilot
waits on First articles delivered
Ten complete units assembled in-house. Track yield, defect modes, and cycle time on a shared dashboard.
Kick off compliance + certification
Engage a notified body for the relevant standards. Booking a slot now beats discovering a 12-week wait later.
Weeks 8–16
2 tasks
Put 25 units in the hands of lighthouse users
waits on Integration pilot complete
These users help refine the product, but they also become your first paid customers. Charge a symbolic price so the data is real.
Scale-readiness review with the chosen primary vendor
waits on Lighthouse trial telemetry
Before you tool up for 1000 units, walk the line together and agree on capacity, payment terms, and the failure-mode plan.
Ongoing
1 task
Stand up a customer support loop
Every defect that reaches a user becomes a ticket, a root cause, a fix, and a regression test on the line.
Who you need
3 roles to fill before month one
Battery-program PO
EIT InnoEnergy
First call for any cell-pack pilot funding in EU.
UN 38.3 test lab
TÜV Sud
Books out 12 weeks ahead — call them before EVT.
Cell research lab
INL Braga
Owns the best cell-characterisation rigs in Iberia.
Watch-outs
3 things to avoid in this plan
cost
Founder time leaks into vendor management instead of customer development
certification
Compliance booked too late and blocks shipping for 8+ weeks
quality
Demand exceeds the chosen vendor's small-batch capacity right when momentum matters
2 tasks in week 1
Lock the pilot scope to one variant