Household energy storage products can be mainly divided into the following types:
DC coupling system: In this system, the photovoltaic modules and energy storage batteries are directly connected to the inverter-control integrated machine, and the electricity generated by the photovoltaic modules enters the battery storage through the MPPT controller (DC-DC). This system is suitable for the incremental market of newly installed photovoltaic systems. The system has high system integration, convenient installation and after-sales service, but the increase and decrease of equipment is relatively complicated.
AC coupling system: In the AC coupling system, the photovoltaic inverter is connected to the photovoltaic module to convert the electric energy into AC output (DC-AC); the energy storage converter (PCS) is connected to the battery to release the stored electric energy to the load (DC-AC). This system is suitable for the stock market of installed photovoltaic systems, with flexible connection, convenient increase and decrease of equipment, but high safety.
Hybrid household photovoltaic + energy storage system: It consists of photovoltaic modules, lithium batteries, hybrid inverters, smart meters, etc. The system can realize photovoltaic power generation to supply loads, charge batteries, and provide power guarantee when the power grid is out of power. The system is highly integrated, with low installation cost and intelligent control to meet user needs.
Coupled household photovoltaic + energy storage system: also known as AC transformation photovoltaic + energy storage system, it consists of photovoltaic modules, grid-connected inverters, lithium batteries, AC coupling energy storage inverters, etc. This system can transform the existing grid-connected photovoltaic system into an energy storage system, with low investment cost and compatible with grid-connected photovoltaic systems of different manufacturers.
Off-grid household photovoltaic + energy storage system: It consists of photovoltaic modules, lithium batteries, off-grid energy storage inverters, loads and diesel generators. This system is suitable for areas without power grids to meet daily electricity needs and can be used in combination with diesel generators.
All-in-one machine: An integrated system that places energy storage inverters, energy storage batteries and controllers inside. This system displays the working status conveniently and quickly through the touch screen, and has multiple working modes, such as solar energy priority mode, city power priority mode, etc.
Split type: The energy storage battery and energy storage inverter are installed separately, and users can install them according to their own needs. This system is highly flexible and users can match the inverter and battery system according to their needs.