Household hybrid solar energy storage system introduction.

The structure of the household energy storage system includes: PV, energy storage batteries, hybrid inverters, and metering equipment, grid, loads. The PV energy preferentially meets the power consumption of the important load, and then the battery is charged, and finally flows to the household load, and then flows to the grid.

working principle

(1) In the morning, the PV energy is first supplied to the load, and the household load consumes the maximum amount of photovoltaic power. The remaining electricity will be stored by the battery; if the light is insufficient, the battery will replenish the energy to the load.

(2) In the afternoon, after meeting the household load consumption and the battery is full, the remaining power will be fed to the grid.

(3) In the absence of sunlight, the battery is inverter-inverted into an AC power supply for use by the inverter.

(4) When the battery cannot meet the load demand, the grid will replenish the power for the load.

How to configure a 5KVA hybrid solar system:

1. solar panel. To find out the space for installation. Select 18 pieces of 300Wp crystalline silicon components, 9 pieces / string * 2 in parallel to connect 1 5kW and off-grid integrated inverter (single phase), inverter output 220V voltage, 50Hz sine wave AC, through grid connection The box is connected to the grid and connected to the grid.

2. Battery. To find out the total load commonly used in your house. For example, if you need 10kwh, the battery selection specification is: 12pc, 200Ah battery 12pcs, using 4 string 3 way to connect 5KW through DC DC switch and off-grid integrated machine inverter The total capacity of the battery is 28.8KWh. Considering the discharge depth of the battery (DOD=70%), the battery conversion efficiency is 94%. The actual usable capacity is 18.95KWh, which can maintain the household electricity consumption for 1.9 days.

3. Hybrid Inverter. Single phase5KW hybrid inverter.

4. Materials list:

System design and installation must be carried out by qualified person.