The purpose of this project is to evaluate advanced inverter functionality with the goal of enabling a higher penetration of photovoltaics on California distribution systems. The project is specifically focused on the local PV hosting limitations that occur when multiple PV systems are installed on the same residential transformer. To mitigate these limitations, the project involves multiple smart inverters and other residential Distributed Energy Resources (DER), e.g., electric vehicle chargers and other smart loads. Over the course of the project, these devices are enhanced to optimize PV support, and tested individually and in combination, in both laboratory and field environments. The process identifies how the functions noted in California Public Utilities Commission’s Rule 21 on interconnections can be used and configured so that multiple smart inverters work in harmony (supporting one another’s actions). It also identifies how other common consumer devices, such as electric vehicle chargers and other smart loads, can serve to further enable high levels of solar PV.