Project Overview
A UK EV charging network operator managing 840 charge points across 280 sites needed to replace 3 separate man...
Technology Stack
Compliance & Standards
The Challenge
A UK EV charging network operator managing 840 charge points across 280 sites needed to replace 3 separate management systems — a legacy OCPP 1.6 network management system (no smart charging capability), a separate billing system, and a paper-based maintenance system. OZEV (Office for Zero Emission Vehicles) grant reporting requirements, UK GDPR for driver charging data, and OCPP 2.0.1 (smart charging protocol) were the primary requirements. Budget: £120,000.
Our Approach
Central System
- Open Charge Point Protocol 2.0.1 implementation: WebSocket connections from 840 charge points to the central system.
- OCPP 2.0.1 features over 1.6: smart charging (ISO 15118 Plug &
- Charge), improved security (TLS mutual authentication), enhanced diagnostics, and local controller support.
Charge point firmware upgrades
OTA (over-the-air) update capability via OCPP 2.0.1 FirmwareStatusNotification.
Smart charging profiles
- dynamic load balancing per site (prevent grid connection overloading), time-of-use tariff optimisation (charge cheaper off-peak), and vehicle-to-grid (V2G) readiness architecture.
- Demand Flexibility Service (DFS) integration: National Grid ESO DFS API for demand response events — automatically reduce charging load during grid stress events and report demand reduction.
React Native driver app
nearby charger map, start/stop charging session, real-time session monitoring, payment (Stripe), receipts, and charging history.
UK GDPR
charging session data (location, energy consumed, vehicle identifier) is personal data.
Basis
contract performance.
Retention
7 years (VAT record-keeping obligation).
Right to access
driver can export all session history.
OZEV Grant Reporting
OZEV Workplace Charging Scheme (WCS) and
EV Infrastructure Grant reporting
automated extraction of qualifying sessions (workplace/residential), energy delivered per session, and compliance with grant conditions (public access requirements).
OZEV audit trail
every session logged with OCPP message hash for tamper-evident reporting.
The Results
Platform live at 16 weeks, £112,000 — under budget.
Charge point uptime: 91% → 98.2% (proactive monitoring replaced reactive complaints).
Smart charging: peak site power demand reduced 34% average (preventing grid connection upgrades at 12 sites — estimated £480,000 infrastructure saving).
OZEV grant reporting: automated — previously 3 days/quarter manual.
Driver NPS: 4.5/5 (legacy app: 2.1/5).
“The smart charging peak demand reduction saved us £480,000 in grid connection upgrades — that's four times the cost of the platform. The OZEV grant reporting is now automated, and the driver NPS went from 2.1 to 4.5. The previous platform was actively damaging our reputation." — CTO, UK EV Charging Network (name withheld)”
Project Details
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