The Mobility House · eyond · 2024
A feature redesign giving EV drivers full control over their charging mode from anywhere. The location constraint had frustrated users since launch. Two interaction approaches were explored and validated through moderated usability testing, user interviews and surveys with real eyond users.
Year
2024
Role
Lead Product Designer · Interaction Design · Usability Testing
Team
Product Designer · Product Manager · Engineers
Platform
iOS & Android
The problem
EV drivers could only switch charging modes (Flex, PV or Instant) when physically plugged in at home. Qualitative feedback was consistent: users felt the app didn't trust them to make their own decisions about their own car.
The constraint wasn't technical. It was a UX decision that hadn't aged well.
What I built
I redesigned the charging mode selector to be location-independent, accessible at any time from the main dashboard. The key design decision: settings take effect when the car connects, not immediately. This respected the hardware constraint while giving users genuine planning control by switching to Instant before leaving work, or scheduling PV the night before.
Outcome
Moderated usability testing showed Implementation 2 consistently outperformed Implementation 1 with faster mode switches and more confidence when the control lived in the charging status card. Post-launch user interviews and surveys confirmed the shift, and support tickets dropped. No formal usage tracking was in place, so this is qualitative evidence, not usage metrics.
Locked.
Mode switching unavailable when unplugged.
Switchable from anywhere.
Changes take effect on the next home charge.