Main types of household light storage systems

01 Off-grid integrated photovoltaic energy storage system

It is mainly composed of components, lithium batteries, energy storage inverters, smart meters, power grids, grid-connected loads and off-grid loads. The system has high integration and intelligent control, and can switch working mode according to the situation to meet the needs of users.

02 AC coupled photovoltaic energy storage system

It is mainly composed of components, grid-connected inverters, lithium batteries, AC coupled inverters, smart meters, power grids, grid-connected loads and off-grid loads. The system is mainly used in the application scenario of the existing photovoltaic system to expand the energy storage system, with low input cost, strong compatibility, and suitable for grid-connected photovoltaic systems of different manufacturers.

03 Off-grid photovoltaic energy storage system

The system is mainly composed of components, energy storage batteries, off-grid inverters, loads and generators. The system is mainly used in remote areas and isolated islands without power grid. It is suitable for the daily demand of electricity in areas lacking of power grid, and can be networked with generators to form a stable complementary power supply system.

Household light storage system main working mode

01 Spontaneous self-use

When the light is sufficient, the solar modules supply power to the household load, the excess energy first charges the battery, and the remaining energy is sold to the grid.

When the light is insufficient, the solar power is not enough to meet the household load power, at this time the battery discharge, together with the solar energy to meet the household load power supply, if the battery power is insufficient, it is supplied from the grid. Suitable for large electricity consumption, ladder electricity price difference under the household light storage scenario.

02 Cut peaks and fill valleys

Users can use photovoltaic power, off-peak power to charge the battery. The charge/discharge interval can be flexibly set, and you can also choose whether to charge from the grid. It is suitable for areas where the difference between peak and valley electricity prices is large.

03 Standby Power Supply

In this mode, the battery will be forced to charge during a set time zone and will never discharge when the grid is on, and it also allows the choice of whether to charge from the grid or not.

Generally, there are the following application scenarios:

① Rigid demand: for example, in areas with small population distribution and dispersed large power grid power supply difficulties, and large investment in long-distance transmission and poor power quality, the demand for backup power is high.

② Emergency demand (equivalent to UPS function) : used when sudden natural disasters, such as typhoons, earthquakes, etc., cause power outages.

(3) Independent system backup: applied to areas that cannot be covered by the power grid, such as border posts, offshore ships and other areas that are not suitable for access to the power grid.

Summary: Photovoltaic + energy storage system has many advantages, improve the reliability of power supply, improve the self-utilization rate, optimize the electricity cost. From a global point of view, countries and regions due to energy crisis, high electricity costs and weak power grids and other factors, household use of storage development will become the norm.