Fixing EV Charger Trust and Bay Navigation for Confident Charging
Two failures that stack up at a public EV charger, and an MVP built to remove both
✳The problem they went after
EV drivers hit two problems that compound each other. Listed chargers are often unavailable, broken or already occupied, which trains drivers to ignore real-time data and detour to a charger they already trust. Then at malls and parking garages there is no indoor routing to the actual bay, so the search continues on foot after parking. Range anxiety makes both worse.
✳What they actually did
The MVP has three parts. A Reliability Layer puts a Likely Usable badge on station listings, calculated from historical uptime and recent user reports, so drivers can weigh a station before committing to the route. Bay Finder handles indoor routing with elevator and stair references, colour-coded lane overlays and garage-level labels. Plan-B Auto-suggest watches availability live and warns the driver when the destination station turns risky, offering alternatives with updated ETA and remaining range.
✳What you can take from it
Worth stealing
- Likely Usable badge from uptime data plus user reports
- Indoor bay routing via elevators, lanes and level labels
- Plan-B alerts carry updated ETA and remaining range
- Wrong bay reports guard against false confidence
Read this if
PMs designing trust signals where a wrong answer costs real time
The transferable bitLook at the guardrails: wrong bay reports and rapid re-search events. Both exist to catch the case where a confidence signal misleads instead of helping, which is the specific risk of shipping a reliability badge. The headline goals are a 20 percent lift in charging navigation start rate and a 30 percent cut in median search-to-start time.
✳The submission itself
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