The battery design ideas in different application scenarios are different. Normally, there are three common application scenarios: spontaneous self-use (high electricity cost or no subsidy), peak and valley electricity price, and backup power supply (the grid is unstable or has important loads).
Self-generated and self-consumption: Choose to select the capacity of the battery according to the average daily electricity consumption (kWh) of the household (the default photovoltaic system has sufficient energy)
Peak-valley electricity price: Calculate the maximum demand value of battery capacity based on the total electricity consumption during the peak period. Then according to the capacity of the photovoltaic system and the benefit of the investment, an optimal battery power is found within this range.
Backup power supply: The total power consumption when off-grid and the estimated off-grid time are the most critical parameters, and the required battery capacity is finally determined according to the maximum load power and power consumption during the longest continuous power outage in the whole day.
Photovoltaic + energy storage application scenarios
Photovoltaic + energy storage has become a very common utilization method in foreign countries, and there are many application scenarios. The following are some application scenarios of energy storage.
1. Microgrid
Small-scale power generation and distribution systems consisting of distributed power sources, energy storage devices, energy conversion devices, loads, monitoring and protection devices are currently the main applications of energy storage systems in China.
2. New energy vehicle charging station
The development of new energy vehicles is inseparable from the construction of charging infrastructure. The establishment of supporting energy storage facilities is conducive to improving the quality of local grid power and increasing the selectivity of charging station sites.
3. Diesel powered areas
Energy storage technology can replace diesel generators, reduce power generation costs, and reduce air and noise pollution caused by diesel generators.
4. Trading with renewable energy power plants
The energy storage system participates in the paid peak shaving auxiliary service of electric power, which helps to make up for the short board of insufficient peak shaving capacity of the power supply.