Through the 568-megawatt (MW) capacity Project Hestia, Sunnova will make available rooftop solar, battery storage and virtual power plant (VPP)-ready software available during the next 25 years. The smart software, app and portal aims to not only lower emissions but also "enhance the informed use of load controllers and smart appliances, and support grid stability by giving consumers near real-time insight into their residential energy system and quantifying the location-specific emissions impact of changes in consumer behavior," Sunnova said.