Economic Impact of Export Revenue in Residential Vehicle-to-Home and Vehicle-to-Grid Energy Optimisation

This study examines the economic effect of EV-supported export in a residential PV–battery–EV scheduling model using one prepared House1 dataset from 13 June to 2 October 2014. Corrected V2H and export-enabled V2G share cost-minus-revenue accounting and mobility inputs. Capping the stationary-battery reserve target at its 3 kWh usable energy band resolves the original reserve/SOC contradiction and yields valid solutions for all 90 selected days. Without an EV terminal condition, V2G incurs lower costs on 90/90 days, with mean savings of £0.501677/day. Actual re-optimisation with the final EV energy constrained to be at least equal to the initial energy reduces mean savings to £0.012216/day, with 45 lower-cost days and 45 ties within £0.00001. Symmetric post-optimisation restoration accounting instead gives mean savings of −£0.619249/day under both flat off-peak pricing and the specified next-day EV-only charging schedule. Baseline re-optimised export-value onset also shifts upward when terminal energy is constrained. These results distinguish the short-horizon export-revenue mechanism from the value available without net EV depletion. They do not establish full-system cyclic operation, annual investment profitability, or distribution-network feasibility.