1. (1) California Energy Commission: Tracking Progress (2017)
2. (2) IEEE power & energy magazine: Time in the Sun (2013)
3. (3) Sandia National Laboratories: Test Protocols for Advanced Inverter Interoperability Functions-Appendices (2013)
4. (4) Electric Power Research Institute: Common Functions for Smart Inverters (2016)
5. (5) SunSpec Alliance: SunSpec-Information-Models-12041 (2015)