Introduction?

Project Volta was all about making EV charging feel effortless. From tap-to-charge interactions with the Payter device to backend admin setup in Sky, designed the full journey to be simple, fast and user focused.

Goal

• The goal was to design a seamless interaction between users and the Payter payment device for charging electric vehicles for both single-port and multi-port stations.

• In parallel, we crafted the admin experience for setting up and managing Payter integrations through our internal platform, Sky.

Understanding the Users

• To design effectively, we first immersed ourselves in the needs of two key user groups

  • Everyday EV drivers

  • Internal station admins.

• Drivers needed a fast, intuitive way to start charging without technical friction.

• Admins needed a reliable, scalable setup process to manage Payter devices across locations with minimal effort.

Design Approach

We followed a lean, iterative process—from low-fidelity wireframes to high-fidelity prototypes—focused on clarity, speed, and ease of use.

EV Drivers

• Sketched quick tap-to-charge flows

• Designed states for single and multi-port charging

• Prototyped feedback loops for error, success, in-use, and fallback states

Admins

• Mapped setup flows for device-to-port mapping

• Created dashboards for status monitoring and transaction history

• Built in bulk actions and validations to reduce manual errors

"We collaborated across teams, tested early with users, and refined based on feedback to ensure every interaction felt intentional."

Key UX Decisions

We focused on reducing friction, increasing clarity, and designing with real-world constraints in mind.

Customizable Case Studies

For multi-port stations, we designed a quick port selector flow with visual port indicators to minimize user error.

Scalable UX Solutions

States like "Charging", "In Use", and "Tap Again to End" were designed to be ultra-clear using iconography and text—no guessing games.

Tap-to-Start Simplicity

We prioritized a one-step payment interaction. No apps, no confusion—just tap your card or phone to the Payter and start charging.

Fail-Safe Admin Workflows

In Sky, we included inline validation, default port rules, and device previews to reduce configuration mistakes.

Designed for Edge Cases

What if Payter is offline? What if the user walks away? All flows accounted for timeouts, error states, and device recovery.

Outcome And Matrics

The redesign didn’t just look good—it worked. Here's how Project Volta made a measurable difference for both users and admins:

EV Drivers

• Start-to-charge time reduced from 2+ minutes → ~30 seconds

• User confusion at Payter interface dropped significantly during field tests

• User satisfaction score (CSAT): jumped from 3.2 → 4.7 out of 5

Admins

• Setup time for Payter in Sky dropped from ~20 mins → ~8 mins

• Setup-related support tickets decreased by 63%

• Successful charge sessions (post-deployment): ↑ by 48% in first month

"We validated the experience through field testing, internal pilots, and feedback loops after deployment—proving that thoughtful UX can directly impact adoption and efficiency."