1. Q: What is the 2s backflow prevention function? Is it a globally unified requirement?
2. Q: Does a parallel C&I ESS system contain no more than 4 ESSs?
3. Q: Is an isolation transformer required when the ESS or PV+ESS system is configured in the maximum self-consumption mode?
4. Q: What are the requirements on the power supply of auxiliary devices of C&I ESSs?
