The battery design ideas in different application scenarios are different. Common application scenarios include self-generated and self-consumption (high electricity bills or no state subsidies), peak-to-valley electricity prices, and backup power (unstable power grids or important loads).

Self-generated and self-consumption:

Choose to select the battery capacity based on the average daily electricity consumption (kWh) of the household (the default photovoltaic system has sufficient electricity).

Peak-valley electricity price:

Calculate the maximum demand value of battery capacity according to 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. The required battery capacity is finally determined according to the maximum load power and the power consumption during the longest continuous power outage.