Smart EV Charging & Energy Management Platform
Executive Summary
A charge point operator scaling public, workplace, and fleet charging faced fragmented charger brands, poor uptime visibility, uncontrolled site power draw, and no unified driver or billing experience. Demand charges spiked whenever multiple fast chargers ran together, and faults were discovered only when drivers complained.
Tech4Biz engineered a Smart EV Charging & Energy Management Platform: OCPP-based charge station management, smart charging with dynamic load balancing and grid/renewable awareness, roaming, a driver app, a fleet depot portal, and utility demand-response integration, backed by a reference EVSE charge controller design.
This document covers the problem, the engineered solution, the reference charge controller hardware, operator and driver screens, and measurable outcomes.
Problem Statement
- Multi-vendor sprawl : chargers from different makers with no unified monitoring or control.
- Poor uptime : faults found via driver complaints, not proactive alarms; lost revenue and trust.
- Uncontrolled site load : simultaneous fast charging tripped demand limits and raised demand charges.
- No smart energy use : charging ignored tariffs, on-site solar, and battery storage.
- Fragmented payments : inconsistent auth and billing across RFID, app, and card.
- No grid participation : no ability to respond to utility demand-response or dynamic pricing.
The Engineered Solution
A custom platform combining OCPP charge management, edge control, cloud CSMS, AI analytics, and energy management, integrated with billing, roaming, and utility signals. Four layers:
Charger Layer
- AC (7-22kW) and DC fast (50-350kW) chargers, fleet depot banks, and on-site PV/BESS, with Type 2, CCS, CHAdeMO and ISO 15118 plug-and-charge.
Edge / OCPP Layer — T4B-EVSE Controller
- OCPP 2.0.1 client, MID-certified session metering, RFID/NFC and app auth, and local load management to hold the site power cap.
Core / CSMS Layer
- Charge station management, smart charging (V1G/V2G-ready, grid-signal and renewable-aware), AI analytics for utilization and dynamic pricing, billing/CDR, roaming, and a grid interface.
Applications & Integration Layer
- Operator console, driver app, fleet portal, and analytics UI over REST/OCPP/OCPI/OpenADR, integrated with billing, CRM, ERP, payment PSPs, maps, and utility DR.
Engineered Platform Components
EMS value is in the platform and models rather than a bespoke board. Key engineered components:
Multi-Protocol Energy Gateway
- Normalizes heterogeneous meters and BMS points into a single tag model with power-quality metrics and store-and-forward.
Energy Model & EnPI Engine
- Consumption modeling, cost allocation, and energy-performance indicators with ISO 50001-ready baselines.
AI Optimization & Anomaly Detection
- Ranks quantified savings actions, detects waste and drift, and predicts demand for peak shaving.
Carbon & ESG Engine
- Scope 1/2/3 carbon accounting, renewable-share tracking, and audit-ready ESG reporting.
Reference Hardware Design
The edge runs on a reference EVSE charge controller engineered by Tech4Biz, presented as an engineered reference design for deployment on certified charging hardware.
EVSE Charge Controller — T4B-EVSE-R1
- Control MCU — ARM + RTOS running an OCPP 2.0.1 client with secure boot and TLS.
- Control Pilot / PWM — IEC 61851 CP/PP signaling and J1772 state machine.
- MID Energy Meter — certified per-session kWh capture for billing and CDRs.
- RFID / NFC Auth — ISO 14443 plus ISO 15118 plug-and-charge.
- Power Stage Drive — contactor/relay control for three-phase delivery up to 22kW.
- Residual Current — RCD Type-B with 6mA DC ground-fault detection.
- Comms — 4G/LTE, Ethernet, and Wi-Fi for the OCPP uplink; event log retained in NVM.
Applications
Operator Network Console
Fleet-wide station status, live sessions with SOC and power, site load against cap, smart-charging breakdown (load-balanced, DR-curtailed, PV-matched, V2G), and a charger alarm log with remote reset and dispatch.
Driver App
Live session with SOC ring, power, energy added and time remaining, nearby fast chargers with availability and price, wallet, monthly usage with CO2 saved, and charging history across web and mobile.
Business Outcomes
Representative outcome targets delivered by the platform:
| Metric | Before | After |
|---|---|---|
| Charger uptime | Reactive, unknown | Proactive, 99%+ |
| Site demand charges | Uncontrolled peaks | Load-balanced cap |
| Energy sourcing | Grid only | PV + BESS matched |
| Payments | Fragmented | Unified auth + roaming |
| Grid participation | None | DR + dynamic pricing |
| Fleet charging | Manual | Scheduled to SOC |
| Driver experience | Inconsistent | App + plug&charge |
Additonal benefits
- New revenue from roaming, dynamic tariffs, and grid-service participation.
- Lower operating cost through remote management and predictive uptime.
- Accelerated EV adoption through reliable, accessible charging.
- Reduced carbon through renewable-matched smart charging
Technologies
OCPP 2.0.1, OCPI roaming, ISO 15118 plug-and-charge, IEC 61851; IoT edge controllers; MID metering; MQTT/Kafka; time-series databases; AI/ML; on-site PV and BESS; OpenADR grid signals; REST APIs and enterprise integration.
Industries
Charge point operators, e-mobility service providers, fleet and logistics operators, commercial real estate, retail and hospitality, municipalities and smart cities, and utilities.
Tech4Biz Differentiator
Tech4Biz is an R&D engineering company. We design and engineer custom EV charging and energy-management platforms, combining OCPP charge control, edge hardware, smart charging, AI, and grid integration to help operators run reliable, profitable, grid-friendly charging networks.