OPTIMIZED DELIVERY OF ELECTRICITY OF DOMESTIC RENEWABLE LECTRICAL ENERGY PRODUCTION DEVICES TO ELECTRIC GRID AND CONSUMPTION OF ELECTRICITY BY HOUSEHOLDS FROM ELECTRIC GRID

A method comprising: computing, by an apparatus or system, availability of at least one renewable electrical energy production device that delivers electricity to at least one household associated therewith to deliver electricity to an electric grid; computing, by the apparatus or system, an electricity usage plan for the predetermined period of time; optimizing, by the apparatus or system, the electricity usage plan so that: the electricity to be delivered by the at least one renewable electrical energy production device associated with the at least one household is to be delivered to the electric grid at one or more different time periods at least when an amount of the possible electric power generation corresponding to non-renewable electrical energy generators is greater than at other time periods within the predetermined period of time; andduring a predetermined duration after the time period or periods when the electricity is delivered to the electric grid, the electricity delivered by said at least one renewable electrical energy production device, the electricity delivered by said at least one renewable electrical energy production device for consumption by the respective household of the at least one household is lower than the computed availability during said predetermined duration.