Vehicle to Home
Charging of EVs takes place predominantly at home, offering important potential for smart charging and V2X functionalities. It can increase the uptake of EVs due to its benefits and ease of use, increase the utilization of locally produced renewable energy through the consumption of local renewable energy, and lower the dependency on the grid.
There are two use cases in Greater Munich in this cluster:
Greater Munich
CASE 1
Smart charging & V2X concept for site self-consumption in single family housing
Context
The use case focuses on vehicle-to-home charging in the residential sector for self-consumption. It looks at two residential single-family homes that already have PV power installed and will be equipped with a home-energy-management system, a grid-compliant wallbox, and a bidirectional vehicle from Sono Motors.
The user can control his local energy system including the vehicle-charger combination via the Sono app or the vehicle’s system. The home-energy-management system controls the charging and discharging of the energy flow based on the user’s settings. The battery is charged during the time of PV production and discharged during the night/evening hours.
The EMS is designed to avoid feeding back energy from the EV into the public grid due to regulatory and economic reasons.
As of mid-2023, this use case is to be confirmed and may change.
Specifics
2 detached homes equipped with bidirectional car, charger and PV installation
Objectives
- Proof the AC bi-directional charger as an affordable solution for optimising V2G.
- Find the optimal concept for integrating an EV in a residential energy system using open standards.
- Determine and optimise the costs and benefits for the end user (e.g., quantify EV battery life and savings on energy costs).
- Reduce peak loads and the overall interaction with the grid.
Use case lead: Sono Motors
CASE 2
Extension to V2G services enabling participation in energy market
Context
The use case is about vehicle-to-grid in the residential sector with a focus on the DSO (Distribution System Operator). The use case is planned with two residential single-family homes that already have PV power installed. The houses will be equipped with a home-energy-management system, a grid-compliant wall box, a bidirectional vehicle from Sono Motors and a grid monitoring box from the DSO which is called “Flair Module”.
The increase in distributed energy systems with its volatile production imposes challenges on the distribution grid. The “Flair Module” from the DSO Lechwerke Verteilnetz GmbH (LVN) will be installed in the residential home. It measures grid parameters independently and, if necessary, provides set points to the charger requesting it to charge or discharge the vehicle to reduce the stress for the grid.
As of mid-2023, this use case is to be confirmed and may change.
Specifics
2 homes equipped with bidirectional car, charger, Pv installation and V2G services
Objectives
- Optimise renewable energy utilisation and increase grid flexibility through V2G services in residential areas with local renewable energy generation.
- Find the optimal V2G concept and usability for the end use and optimal control mechanisms and interface.