Ascertaining the Presence of an Intermediate Storage Device in a Local Grid

A method for detecting a presence of an intermediate storage device connected to a local electrical power supply system of a property, comprising, based on an electric vehicle being connected to a charging point:

• measuring a basic power by a first energy meter during a charging rest phase of an electric vehicle;
• simultaneously:
• charging or discharging a battery of the electric vehicle at a charging point with a charging power or discharging power measured by a second energy meter, and
• measuring a power by the first energy meter;
• determining whether the charging power measured during a charging process corresponds at least approximately to a difference between the power measured by the first energy meter and the basic power, and
• determining whether or not an intermediate storage device is connected to the local power supply system based on the determination whether the charging power measured during the charging process corresponds at least approximately to the difference between the power measured by the first energy meter and the basic power,
• wherein:
• the first energy meter is present at a grid connection point between the local power supply system and a public power distribution grid, and
• the charging point for the electric vehicle is connected to the local power supply system via the second energy meter.

A system for detecting a presence of an intermediate storage device connected to a local electrical power supply system of a property, comprising:

• a property including a charging point configured to charge an electric vehicle;
• a first energy meter;
• a second energy meter;
• and
• a data processing device configured to:
• measure a basic power by the first energy meter during a charging rest phase of the electric vehicle;
• simultaneously:
• charge or discharge a battery of the electric vehicle at the charging point with a charging power or discharging power measured by the second energy meter, and
• measure a power by the first energy meter;
• determine whether the charging power measured during a charging process corresponds at least approximately to a difference between the power measured by the first energy meter and the basic power, and
• determine whether or not an intermediate storage device is connected to the local power supply system based on the determination whether the charging power measured during the charging process corresponds at least approximately to the difference between the power measured by the first energy meter and the basic power,
• wherein:
• the first energy meter is present at a grid connection point between the local power supply system and a public power distribution grid, and
• the charging point for the electric vehicle is connected to the local power supply system via the second energy meter.