Work

Wallbox Inspection—Evaluating Solar Controlled Charging of EV Charging Equipment

Year: 2026

Type: article

Abstract: To make electric mobility possible and acceptable on a large scale, it is necessary to integrate electric vehicle (EV) charging infrastructure in residential energy systems. Solar surplus charging, a special case of controlled charging, is a popular and promising operating mode of installed systems. Comparison of different home energy management systems (HEMSs) in combination with a dedicated EV charging station reveals differences in control quality. Within the research project Wallbox-Inspektion, a test setup has been developed. The derived procedures determine the main criteria for evaluating the quality of solar surplus charging. The core question is: “How well does the EV charging power follow the reference?”. This contribution explains the tests for standby consumption and control quality of control steps and presents an approach to determine the impact on use case scenarios. Further, different solar charging systems (i.e., charging station, HEMS, energy meter) available on the market are compared and discussed regarding the quality of implemented solar charging strategies.

Source: World Electric Vehicle Journal

DOI: 10.3390/wevj17060312

Authors: Bernhard Wille-Haussmann, Jan Körber, Vishnu Karthik Senthil Kumar, Nico Orth, Joseph Bergner

Institutions: Fraunhofer Institute for Solar Energy Systems, HTW Berlin - University of Applied Sciences

Language: English

Topic: Electric Vehicles and Infrastructure

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Affordable and clean energy, Industry, innovation and infrastructure, Sustainable cities and communities

Open Access status: gold

Estimated APC paid: $1,689