GoKawiilA new Australian study has found that electric vehicles (EVs) equipped with vehicle‑to‑home (V2H) technology can significantly reduce household electricity costs and lessen the need for large, costly home battery systems.
Researchers from Flinders University, Adelaide University and Murdoch University investigated how using an EV as a mobile energy storage unit influences the optimal sizing of rooftop solar (PV) and home battery storage in grid‑connected residential homes.
By treating the EV as a mobile energy storage unit, V2H enables households to use stored EV energy to power appliances during expensive peak‑demand periods, slashing grid imports and boosting energy efficiency.
The study analysed three residential energy setups:
· Solar + battery + EV with V2H
· Solar + EV
· EV only
Under the most efficient configuration (the first scenario), the researchers found that a 7-kW solar system paired with a 9-kW home battery delivered the lowest annual electricity cost of $2451.
The cost of electricity dropped to 27 cents per kWh and grid electricity imports fell by 78% compared to a house with no solar or battery.
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