E-Infinity Ecosystem: Peer-to-Peer Energy Trading Using X-Changer and Energinx Smart Meters for Reverse Power Flow Prevention

Peer-to-peer (P2P) energy trading in industrial settings is rarely validated with metered data. This paper studies the E-Infinity Ecosystem, coupling the X-Changer trading platform with Energinx IoT smart meters that limit reverse power flow (RPF) at the meter, deployed at a ceramic factory in Saraburi, Thailand. Contributions include (i) coupling meter-level export limitation with interval-level bilateral matching under conventional billing; (ii) an analytical bound on export above the admitted level; (iii) a proof that two-building allocation loses no energy relative to pooled metering; and (iv) metered evidence with uncertainty, economic, and benchmark analysis. Two PV buildings were metered at 10 min intervals over 118 days (January–April 2025): Building 1 generated 573,082 kWh (14.47% self-sufficiency) and Building 2 309,484 kWh (21.10%), with roles following the PV-to-load ratio. Estimated trading potential was 44,275 kWh (96.3% from Building 2 to Building 1), avoiding 185,953 THB at 4.2 THB/kWh. A 12-month dataset gave a 90.00 ± 0.33% matching rate and a ±7.8% seasonal interval on annual volume. Volumes are meter-based estimates; RPF suppression and control dynamics were not measured directly.