Computer-implemented method of providing technical sizing parameters of an energy supply system, computer program product for providing such technical sizing parameters, and computer system for providing such an energy supply system

A computer-implemented method of providing technical sizing parameters for an energy supply system (100) on an existing support structure (3) having a predetermined available surface to be equipped with photovoltaic modules (102), said energy supply system (100) comprising:

• a photovoltaic electricity generation unit (101) having at least one photovoltaic module (102),
• an energy storage unit (103), and
• at least one thermal engine driven electricity generation unit (105),
• the energy supply system (100) being configured to supply electrical energy to an installation (5) having at least one consumer unit (7) and being connected to a public grid subject to potential service interruptions, said computer-implemented method (1) comprising the steps of:
• entering for a predetermined time period electricity consumption chronology (SI) of said installation (5) in a database (53) via user interface means (51);
• entering photovoltaic module (102) yearly production curve for a specific location (S3);
• entering a type of photovoltaic module (102) and its technical parameters (S5);
• entering specific equipment boundary conditions (S7) to illustrate the existing conditions of the installation (5);
• entering photovoltaic production capacity limits and energy storage unit capacity limits (S9);
• estimating a ratio (S11) of self-sufficiency (10) or of self-consumption (20), or of internal rate of return (30) based on several values of the photovoltaic production capacity and of the energy storage unit capacity, said values being comprised between the limits defined at the step of entering photovoltaic production capacity limits and energy storage unit capacity limits (S9);
• displaying (S13) a plurality of energy supply system configurations on the user interface means (51), said plurality of energy supply system configurations being based on:
• said technical sizing parameters obtained at the previous steps;
• a cost of each energy supply system configuration;
• and
• an aging devaluation of each energy supply system configuration;
• wherein each configuration is associated to a sensitivity parameter based on an energy production reliability of said energy supply system and on a grid reliability of said public grid, said sensitivity parameter enabling to determine the optimized technical sizing parameters of the energy supply system (100) regarding the reliability of the public grid.