Composition and product type of home energy storage equipment

Composition and product type of home energy storage equipment
3 min read
29 November 2022

In the context of an energy shortage, Europe is facing a big explosion of energy storage demand. The European Energy Storage Association has found through research and analysis that Europe will need to deploy around 190GW of energy storage systems by 2030. This represents a huge leap over the next eight years from the 60GW of storage systems currently deployed in Europe. Under the dual carbon background, the new energy industry is developing rapidly, and the importance of energy storage continues to increase. Energy storage plays an important role in the application of the power generation side, grid side, and user side. On the power generation side, the energy storage device can effectively solve the problems of instability, intermittency, and uncontrollable new energy generation. In addition, the energy storage can avoid the loss caused by frequent start and stop of the conventional generator set.

With the development of battery, photovoltaic and other technologies, technological and commercial innovations are providing answers to various possibilities of electricity freedom. Portable energy storage and home energy storage are forming more and more broad application scenarios, and corresponding products also emerge at the historic moment. Household energy storage is a necessary auxiliary of the distributed energy system. The core of the household light storage system is a photovoltaic + battery + energy storage inverter. Home energy storage and home photovoltaic system, light storage system mainly includes cell, energy storage inverter (bidirectional converter), component system, and other parts.

The home energy storage system introduced by Qihua is generally 5KW (component + inverter) supporting 10kWh (energy storage battery) or 10kW+10kWh. The battery by QH Technology is the core of the energy storage system, and the cost accounts for about 45-50%. The energy storage converter can control charge and discharge, and carry out AC/DC conversion. The cost accounts for about 10-15%. Module system, namely photovoltaic system, is used for solar power generation, accounting for about 20-25% of the cost; The installation cost increased from 10,000 yuan in 2021 to around 20,000 yuan, accounting for 15-20%.

At present, the product types of household energy storage system are mainly divided into two categories: all-in-one machines and split-type


All-in-one machine: Home photovoltaic energy storage inverter all-in-one machine is an integrated system that puts a photovoltaic inverter, battery, and controller inside. It can display the working state conveniently and intuitively through the touch screen. Parameters can be modified and a variety of working modes can be used for easy use. Generally, there are three working modes: solar priority mode, AC (mains) priority mode, and SE priority mode (cross-peak power mode).

 

Split type (inverter + battery system): The battery of the household split unit is installed separately from the inverter. Users can match the household energy storage inverter according to their own needs. In addition, a switching power supply or inverter can be matched as a backup power supply. Generally, it includes four types: hybrid home PV + energy storage system, coupled home PV + energy storage system, off-grid home PV + energy storage system, and photovoltaic energy storage energy management system.

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