Method to control a flow of energy between a grid and a local system

A method to control a flow of energy between a grid and a local system is disclosed. The local system includes - means to produce energy locally and/or - means to store energy produced locallyor to absorb energy from the grid and/or - means to consume energy produced or stored locally or absorbed from the grid. The method stores in the local system information on - energy produced locally in the past and/or - energy suppliedto the grid in thepast and/or - a load of the grid in the past. The stored information is used to program, in the local system, next - storages of the energy and/or - consumptions of energy and/or - supplyof energy to grid.