1. Charging Costs: 15 kWh per 100 km, approximately 1200-1500 RMB per year for 3000 kWh charging. 2. Solar PV Payback Period: A 5.5kW system generates 6000 kWh annually, yielding an annual income of approximately 3000-3400 RMB, with a payback period of 6-8 years. 3. Battery Configuration: 15-20 kWh battery for those with a fixed parking space and long commutes; fast solar charging is available for short commutes. 4. Applicable Scenarios: More cost-effective if you have a parking space, good orientation, and high electricity prices (Guangdong/Zhejiang/Shanghai). 5. Six Issues: Installation space, sunlight conditions, electricity price, charging capacity, residential stability, and policies. 6. In short: For those whose annual charging costs exceed 2000 RMB, installing solar PV is likely worthwhile.

1. DC Side Wiring: Series and parallel design, MC4 connector connection, DC cable selection, and operation after shielding the circuit board. 2. AC Side Grid Connection: Dedicated circuit + independent circuit breaker, bidirectional energy meter, three-phase balanced connection. 3. Grounding and Lightning Protection: Inverter casing grounding, bracket grounding, DC/AC surge protector installation. 4. Communication and Monitoring: WiFi signal testing, CAN/RS485 communication line connection, power sensor installation. 5. Safety Reminders: No "neutral wire" for DC power; operation must be performed by a certified electrician; acceptance inspection includes anti-islanding protection. 6. Acceptance Checklist: MC4 connector pull test, grounding resistance test, APP data synchronization confirmation.