Design an intuitive public EV fast-charging station kiosk

Design an accessible, foolproof public DC fast-charging station kiosk and mobile payment flow that solves the pervasive broken chargers, confusing payment apps, and cable wrestling plaguing non-Tesla EV drivers.

Context

Over 25% of non-Tesla public charging attempts fail due to broken card readers, app authentication errors, short stiff cables, and cryptic error messages.

Clarifying questions to ask first

Is this designed for all EV brands (CCS / NACS connectors)? (Universal NACS + CCS).
How is station maintenance managed? (Real-time automated diagnostic telemetry).

How to approach it

Analyze User Pain Points: 15 different required mobile apps and accounts, payment tap reader failures, heavy rigid charging cables in freezing weather, lack of charging speed transparency, zero shelter from rain
Design Hardware & Physical Ergonomics: Overhead articulating cable arm (takes cable weight off driver's hands), High-brightness anti-glare sunlight touchscreen, All-weather canopy with bright status beacon lights (visible from 100m away)
Design Software & Payment Simplicity: Plug & Charge (ISO 15118) automatic billing, Universal tap-to-pay credit card without account registration, Real-time charging curve and cost progress display
Define Station Reliability and Uptime Metrics

Framework: EV Driver Journey & Frustration Audit -> Physical Kiosk & Cable Ergonomics -> Software UI & Universal Payment Rails -> Station Uptime & Reliability SLA

Sample answer

Forcing drivers to download an app and create an account in the rain causes immediate churn; universal credit card tap is mandatory
Cable management must support drivers of all physical strengths and accessibility needs

MVP: Articulating overhead cable arm, high-contrast sunlight display, tap-to-pay card reader, overhead status light tower, and 99.5% uptime telemetry

Executive design: A universal, weather-sheltered EV fast charger featuring weightless overhead cable arms, direct tap-to-pay checkout, and clear real-time charging status beacons.

What interviewers look for

Physical Cable Ergonomics & Weatherproofing
Payment Friction Elimination (Tap-to-Pay / Autocharge)
Status Visibility & Error Recovery UX
Charger Uptime & Success Rate Metrics