Residential PV systems with battery backup power attained already grid parity?

Due to the demise of FiT, PV grid connected systems focused towards self-consumption. A residential customer installing a grid-connected PV system, usually called a “prosumer”, is paid for the exported electricity less than 5 c€/kWh (or nothing) by the electricity provider while charged about 16/17c€/kWh for the same kWh. At this exchange rate it is more economical to consume than to export. Residential consumption does not coincide with PV production and the majority of the energy produced will be exported to the grid instead of self-consumed. NPV maximizes at a 95% of self-consumption in the best case studies which usually is attained with small percentage of self-sufficiency and low power installed. With further increase of retail electricity prices and decrease of PV costs the business case for storage becomes economically viable for residential customers with the advantage of increasing self-sufficiency and energy efficiency (energy is generated locally).