UPI-Integrated Smart Electric Vehicle Charging Estimator

This work presents a novel approach to electric vehicle charging by embedding UPI-based digital payment directly into the charging control loop. Unlike conventional stations that depend on RFID tokens or dedicated mobile applications, the proposed architecture allows any user with a UPI-enabled device to initiate a charging session instantly, without prior registration or proprietary hardware. At the core of the design, an ATmega328P microcontroller governs the interaction between payment confirmation signals and relay-controlled power delivery. This tight coupling between financial authorization and physical energy flow ensures that electricity cannot be drawn without a verified transaction, significantly reducing the risk of unauthorized usage.   Prototype evaluation on a 12V/10Ah Li-Ion cell confirmed reliable relay switching, accurate energy metering, and stable GSM-based communication throughout the session lifecycle. These results validate the feasibility of the core concept, even though the present version represents a laboratory-scale demonstration rather than a production-ready deployment.   Looking ahead, several enhancements can elevate the system toward commercial viability. Integration of solar photovoltaic panels with battery backup would reduce grid dependency and improve sustainability. Incorporating faster charging protocols, cloud-hosted transaction logs, and a multi-station operator dashboard would further strengthen scalability.   In essence, this project bridges two of India’s most significant technology-driven initiatives—digital payments and electric mobility—into a unified, accessible, and secure charging ecosystem that holds strong promise for widespread urban and rural deployment.  

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