project. This was achieved via ongoing engagement and education of the project, power system, challenges, and opportunities for customers and community. Rooftop solar and BESS were launched in the community in March 2019 and had signed up 2.1 MW (inverter capacity) of rooftop solar and over 500 kWh of energy storage by the close of the incentive in December 2019. Technical: Architecture and IEEE 2030.5 Horizon Power made an early decision to adopt the IEEE 2030.5 Standard for Smart Energy Application Protocol to securely manage distributed generation, storage, and demand response systems. Horizon Power's partners on the project included PXiSE Energy Solutions, which supplied the centralized distributed energy resources management system (DERMS). With a central DERMS in place, Horizon Power also partnered with SwitchDin to provide the edge or " secure gateway device " installed at each home as the translator of IEEE 2030.5 commands from the DERMS into the appropriate control signal to the real inverter hardware (Figure S1). Project Outcomes Customers connected 2.1 MW of discounted solar (far exceeding the network's 850 kW limit without coordination) while accepting the need for " generation management " to protect the network from power quality and reliability issues from reverse power flow and intermittency of solar generation. This included providing concessions to lowincome households with solar installed on every home in the Onslow Bindi Aboriginal community. Network and customer DERs are now capable of providing up to 50% of Onslow's annual energy volume as managed by Horizon Power's centralized DERMS. Horizon Power's DERMS is currently " orchestrating " the following in tandem with the central gas and diesel power station: * 2.1 MW of customer rooftop solar * 1-MW solar farm * 500 kWh of customer energy storage including " smoothing " * 1-MW/1-MWh BESS * 1-MW/500-kWh BESS (utilized at power station as grid-forming device when testing gas and diesel off/ renewable generation only). (Continued) Predictive Analytics SCADA Systems IT Systems M-DERMS S-DERMS Utility BESS Power Station Distributed Solar Rooftop Solar Utility Solar Distributed BESS Distributed Smart Appliances figure S1. Horizon Power DERMS high-level architecture. M-DERMS: master-DERMS; SCADA: supervisory control and data acquisition; S-DERMS: system-DERMS. september/october 2021 ieee power & energy magazine 81