Smart City - Open Innovation Challenge - Catalan Solutions

4–6 Nov 2025 | Barcelona - Hospitalet del Llobregat, Spain

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ChallengeUpdated on 24 July 2025

Multidirectional energy flows: Vehicle-to-grid-to-home. Designing powerful inverters.

Sr Open Innovation Expert at REPSOL

BILBAO, Móstoles - MADRID, Spain

About

To design a bidirectional inverter that allows the battery of an electric or plug-in hybrid vehicle to be utilized as an active part of household energy consumption. The device must manage the conversion of direct current (DC) from the battery to alternating current (AC) to directly power domestic consumption, and vice versa, enabling vehicle charging from the grid.

The inverter should facilitate intelligent energy flow management, allowing the system to automatically decide whether to supply energy to the house, store energy in the battery, or draw electricity from the grid at any given moment. Priority will be given to energy efficiency, reliability, and compatibility with a wide range of vehicles and domestic networks.

Additionally, the system must consider the possibility of renting storage capacity to the electric company. This means allowing the company to use part of the car's battery as distributed storage at certain times, in exchange for financial compensation for the user. To achieve this, the inverter must be prepared to communicate in real-time with the electric provider's platform, ensuring traceability, control of charge and discharge cycles, and protection of the user's battery.

The challenge lies in designing a compact, economical, scalable, and connected inverter that makes this integration model between vehicle, home, and electric grid viable and straightforward. The ideal solution should be easy to install, safe, and comply with current interconnection regulations.

Topic

  • Cleantech
  • Clean Energy
  • Energy
  • Energy Efficiency
  • Electric Mobility

Type

  • Proof of concept/pilot testing
  • Co-development
  • Client-provider collaboration (commercial agreement)

Organisation

REPSOL

Corporation

Madrid, Spain

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