Product Name: 20kWh PV storage charging system
Description: Generates 50 kWh of electricity per day
This system integrates rooftop photovoltaics, energy storage batteries, charging piles, and electric cars into a whole, using the grid as a backup power source. It can charge the car with excess photovoltaic electricity, or use the car's battery to supply power to the home. The car is not only a means of transportation but also part of the energy storage system.