Techno-economic impacts of Volt-VAR control on the high penetration of solar PV interconnection

•Techno-economic analysis of VVC in normal size solar inverter over a 2-year and 24 years period respectively.•Technical and economic impacts of over-sizing solar inverter and comparing with the normal size smart inverter as well as traditional inverter.•Same node collaborative-supportive VVC utilizing BSS for efficient reactive power support to the power grid.•Digital twin testbed to verify the results.