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CASE STUDYMOBILITY · OCPP EV CHARGING BACKEND

Lioncharge

An OCPP-compliant EV charging platform supporting six OEM charger types, with a user app for QR charging and wallets, automated franchise payouts, and an AI support agent.

127Weeks operated
6k+Hours of work
11Engineers

The brief

Build and maintain a production-grade EV charging management platform for LionCharge's Hyderabad-based EVSE deployments, enabling end-users to discover, initiate, and pay for charging sessions while giving facility operators and franchise partners real-time monitoring, financial settlement, and fleet management capabilities.

What we built

A full-stack EV charging management platform covering:

  • OCPP-compliant session management supporting 6+ OEM charger types (ABB, EVRE, Axonify, Exicom, TruePower, PlugSmart)
  • end-user PWA for QR/RFID charging, wallet top-up, real-time session monitoring, and invoice access
  • multi-role admin CMS with dashboards, business KPIs, tariff management, and asset management
  • franchise/settlement engine with automated daily/monthly payouts via RazorpayX, PDF/XLSX invoices via SES
  • multi-tier white-label client onboarding (Basic/Standard) with subscription management
  • LEO AI conversational agent (n8n-powered) with 4 sub-agents covering payments, charger availability, FAQs, and charging history
  • dynamic load balancing module
  • Beckn open network integration
  • granular RBAC with VAPT-validated security; and
  • AWS infrastructure with RDS read replicas, ELK stack, and self-hosted n8n.
⊛ Live in production

Full platform in production: OCPP server managing live chargers across multiple residential/commercial sites in Hyderabad; user PWA with LEO AI agent; admin CMS with business metrics; automated franchise settlement pipeline via RazorpayX; WhatsApp notifications via Twilio; Beckn network registration in sandbox/UAT; RBAC-hardened multi-role access; AWS infra with read/write DB replicas and ELK logging.

How it was built, phase by phase.

8 workstreams across 127 weeks of operated delivery

  1. (001)BUILDWeek 1–20 (Dec 2023 – Apr 2024)

    OCPP-Compliant EV Charging Session Management

    End-to-end charging session lifecycle: QR scan initiation, real-time status polling (units delivered, charging speed, time remaining), RFID-based sessions, remote start/stop from admin.

    ✓ Stable charging session flow across multiple OEM charger types with QR, RFID, and remote initiation.

    Node.jsReact.jsOCPPWebSocketRazorPay
  2. (002)BUILDWeek 14–40 (Mar 2024 – Jul 2024)

    Wallet, Payments & Refund Engine

    Full payment cycle: Razorpay wallet top-up, composite payout via RazorpayX, refund (auto and manual), rollback on failure, refund invoices, and webhook-based status reconciliation.

    ✓ Automated refund and payout system with invoice generation, webhook-driven reconciliation, and manual override capability for operators

    Node.jsRazorPayRazorpayXAWS LambdaAWS SESPDF generation
  3. (003)BUILDWeek 20–95 (May 2024 – Jan 2025)

    Admin CMS Dashboard & Business Metrics

    Multi-role admin dashboard with real-time KPIs (energy delivered, revenue, sessions, carbon emissions), business metrics module (User KPIs, Operational KPIs), bar/line charts with custom date filters.

    ✓ Comprehensive analytics dashboard with operational and user KPIs, multi-station filtering.

    React.jsNode.jsReduxChart.js / AG GridAWS
  4. (004)BUILDWeek 26–60 (May 2024 – Nov 2024)

    Franchise & Settlement Management

    Multi-tier franchise management with daily and monthly settlement calculations, commission percentage deduction, PDF/XLSX invoice generation via AWS SES email, settlement status tracking, and RazorpayX automated payouts.

    ✓ Automated settlement pipeline with configurable franchise commission, multi-format invoice delivery, and RazorpayX payout integration

    Node.jsAWS LambdaAWS EventBridgeAWS CloudWatchRazorpayXAWS SES
  5. (005)BUILDWeek 40–80 (Jul 2024 – Jan 2025)

    White-Label / Client Management & Onboarding (Blue Label)

    Multi-tier client onboarding (Basic, Standard) with self-serve signup flow, tariff/tax creation, billing/banking details, subscription plans, asset management, and client lifecycle management including decommission.

    ✓ Self-serve onboarding platform for facility operators with tiered subscription plans, configurable tariffs, and full lifecycle management

    Node.jsReact.jsReduxAWS SESSequelize
  6. (006)INTEGRATEWeek 50–100 (Sep 2024 – Jun 2025)

    AI Load Balancing & Dynamic Load Management

    Dynamic load balancing (DLB) for EV charging stations to prevent overloads, with per-station available load configuration, connector-level distribution, and togglable feature flag per client.

    ✓ Per-station dynamic load balancing deployed to production with client-level feature toggle and validated across multiple OEM charger types

    Node.jsOCPPReact.js
  7. (007)BUILDWeek 90–130 (Feb 2025 – Apr 2025)

    LEO AI Conversational Agent (n8n-powered)

    Multi-agent conversational chatbot (LEO) built on n8n workflow automation: Account Top-ups & Refunds Agent, Charger Availability Agent, FAQ & Support Agent, and Charging History Agent.

    ✓ Live conversational AI agent embedded in user app supporting payments, charger discovery, FAQ handling, and charging history queries

    n8nNode.jsReact.jsRazorPayTwilioWhatsApp Business API
  8. (008)STABILIZEWeek 90–120 (Feb 2025 – Jul 2025)

    Role-Based Access Control (RBAC) & Security Hardening

    Granular RBAC across Admin, Operations, Support, Standard, and Basic roles with encrypted localStorage role storage, URL-path access blocking, permission sync via Google Sheet API.

    ✓ Hardened RBAC system with encrypted client-side role storage, URL-based access enforcement, and VAPT-validated security headers in production

    React.jsNode.jsOWASP ZAPHelmet.jsGoogle Sheets APIlocalStorage encryption

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