Household energy storage profile
1. Household energy storage: the core is the light storage system of battery + energy storage inverter
Household energy storage is a necessary auxiliary to distributed energy systems. According to the application scenarios, energy storage can be divided into user side (self-use, peak-valley price difference arbitrage), power generation side (renewable energy grid connection, reduce light abandonment and wind abandon), power grid side (power peak modulation, frequency modulation), transmission and distribution side, and auxiliary services (5G base station backup power supply), etc.
The core of the household optical storage system is the photovoltaic + battery + energy storage inverter. Household energy storage system and household photovoltaic energy storage system and household light storage system system are combined with a household light storage system, Optical storage system mainly includes battery cell, energy storage inverter (bidirectional converter), component system and other parts, The typical system is generally 5KW (component + inverter) equipped with 10KWH (energy storage battery) or 10KW + 10KWH, The battery cell is the core of the energy storage system, Cost accounted for about 45-50%; Energy storage converter can control the charge and discharge, Transform the AC / DC current, Cost accounted for about 10-15%; The module system is the photovoltaic system used for solar power generation, Cost accounted for about 20-25%; Installation costs rose from 20,000 to around 20,000 in 2021, For 15-20%.
2. Product series: Household energy storage products are divided into all-in-one machines and split machines
Household energy storage system products include an all-in-one machine and a split type.
1) All-in-one machine: home photovoltaic energy storage inverter all-in-one machine is an integrated system of photovoltaic inverter, battery and controller in the interior, through the touch screen to easily, quickly and intuitively display the working state, parameters and can be modified and a variety of working modes, convenient to use. Generally, there are three working modes: solar energy priority mode, AC (mains) priority mode, and SE priority mode (off-peak power consumption mode);
2) Split type (inverter + battery system): the household split machine battery and the inverter are installed separately, and users can match the household energy storage inverter according to their own needs, and they can match the switch power supply or the inverter as the backup power supply. Generally, it includes four types of hybrid home photovoltaic + energy storage system, coupled home photovoltaic + energy storage system, off-grid home photovoltaic + energy storage system, and photovoltaic energy storage energy management system.
3. Technical route: Lithium iron phosphate battery is the mainstream route
The mainstream technology route of household energy storage is lithium iron phosphate, and sodium ion and lithium iron manganese are the new path in the future. Energy storage battery technology route including lithium ion, lead battery, flow battery, etc., the lithium iron phosphate battery for high safety, long cycle life, compared with ternary lithium battery, more conform to the design requirements of energy storage battery, is the mainstream development route of energy storage battery, tesla energy storage battery also gradually from ternary route to lithium iron route. In addition, some companies such as Ningde and Pineng have been developing and testing sodium ion and iron manganese lithium batteries, and we expect that the technical route of energy storage batteries will be further improved in the future.