1/ Hybrid household photovoltaic + energy storage system

System introduction

A hybrid photovoltaic + energy storage system generally consists of photovoltaic modules, lithium batteries, hybrid inverters, smart meters, CTs, power grids, grid-connected loads, and off-grid loads. The system can realize photovoltaic directly charging the battery through DC-DC conversion, and can also realize bidirectional DC-AC conversion for charging and discharging the battery.

Working logic

During the day, the photovoltaic power generation first supplies the load, then charges the battery, and finally the excess power can be connected to the grid; at night, the battery is discharged to supply the load, and the insufficient part is supplemented by the grid; End loads cannot be used. In addition, the system also supports the user to set the charging and discharging time to meet the user's electricity demand.

System Features

• The system is highly integrated, which can greatly reduce system installation time and cost
• Intelligent control can be realized to meet the user's electricity demand
• It can provide users with safe power guarantee when the grid is out of power

2/ Coupled home photovoltaic + energy storage system

System introduction

Coupled photovoltaic + energy storage system, also known as AC retrofit photovoltaic + energy storage system, the system generally consists of photovoltaic modules, grid-connected inverters, lithium batteries, AC-coupled energy storage inverters, smart meters, CT, power grid , grid-connected load and off-grid load. The system can convert photovoltaic power into AC power through a grid-connected inverter, and then convert excess power into DC power and store it in the battery through an AC-coupled energy storage inverter.

Working logic

During the day, photovoltaic power generation first supplies the load, then charges the battery, and finally the excess power can be connected to the grid; at night, the battery discharges to supply the load, and the insufficient part is supplemented by the grid; use. In addition, the system also supports the user to set the charging and discharging time to meet the user's electricity demand.

System Features

• The existing grid-connected photovoltaic system can be transformed into an energy storage system with low input cost
• It can provide users with safe power guarantee when the grid is out of power
• Compatible with grid-connected photovoltaic systems from different manufacturers

3/ Off-grid household photovoltaic + energy storage system

System introduction

The off-grid household photovoltaic + energy storage system generally consists of photovoltaic modules, lithium batteries, off-grid energy storage inverters, loads and diesel generators. The system can realize photovoltaic directly charging the battery through DC-DC conversion, and can also realize bidirectional DC-AC conversion for charging and discharging the battery.

Working logic

During the day, the photovoltaic power generation first supplies the load, and then charges the battery; at night, the battery discharges to supply the load, and when the battery is insufficient, the diesel generator supplies the load.

System Features

• It can meet the daily electricity demand in areas without grid

• Can be combined with a diesel generator, so that the diesel generator supplies the load or charges the battery

• Most off-grid energy storage inverters do not have grid-connection certification, even if the system has a grid, it cannot be connected to the grid.

4／ Photovoltaic energy storage energy management system

System introduction

Photovoltaic energy storage energy management system, the system generally consists of photovoltaic modules, grid-connected inverters, lithium batteries, AC-coupled energy storage inverters, smart meters, CT, power grids and control systems.

System Features

• The control system can receive and respond to external commands, respond to the power demand of the system, and accept the real-time control and scheduling of the system

• Participate in the optimal operation of the power grid to make the use of electric energy more efficient and economical

Summarize

This article introduces several types of household energy storage systems that are currently in use. With the support of policies and the change of people's ideas, it is believed that more and more types of energy storage systems will appear around us.