Energy storage system is composed of devices that control the input/output and conversion /storage of the energy. The process often involves multiple energies, devices, substances, and processes, which is a complex energy system that changes with time, requiring several indicators to examine its performance.
For the way in which energy storage is carried out, the currently existing energy storage systems are mainly divided into five categories: batteries, thermal, mechanical, pumped hydro and hydrogen.
Compared with other energy storage methods, Battery Energy Storage System (BESS) is more suitable for application home appliances with its advantages of safety, mature technology, easy installation and no pollution.
What is battery energy storage system
Batteries are the oldest, most common, and most readily available form of storage, and Battery Energy Storage Systems (BESS) utilize batteries to store and distribute energy in the form of electrical energy. Energy is collected from the grid or from renewable sources (such as solar and wind) and stored using electrochemical technology. The batteries are then discharged and the energy released when needed (during peak demand, power outages and various other applications).
As mentioned above, the energy of battery storage mainly comes from the grid, solar energy and wind energy. With the popularity of photovoltaic power generation, solar energy has become the main object of battery energy storage. According to the composition of the system, battery energy storage system can be divided into grid tied energy storage system, grid connected/off grid energy storage system, off grid energy storage system and micro grid energy storage system.
Next, we take off grid energy storage as an example to introduce the battery storage system.
Household battery energy storage system
Off grid solar energy storage system is consisting of PV power generation, controller, battery and inverter, etc. It can directly charge the battery with PV modules to meet the demand of electricity consumption load. Its core components are the controller that charges the battery and the off-grid inverter that converts the DC-AC phase.
It is suitable for installation in places with frequent power outages or unstable grid power supply. It can not only be charged by solar power generation system, but also charged by conventional power when the grid is energized to guarantee power supply.
Industrial/commercial battery energy storage system
Industrial-grade lithium battery energy storage system is divided into cabinet energy storage system and container energy storage system according to the form of installation.
Among them, the lithium battery cabinet energy storage system is also known as lithium battery storage cabinet, the product is usually lithium iron phosphate battery as the energy carrier, the power is greater than 6200Wh, charging and discharging through PCS, only used as external storage and power supply.
PowMr all in one energy storage system
Although the energy storage system for households is easier than the industrial energy storage system, the installation of the system and the connection between different components is also a rather troublesome step and does not facilitate the daily cleaning and maintenance. Therefore, the inverter charger has gradually emerged as a device that combines the functions of a controller and an inverter in one.
However, we would like to recommend you a simpler energy storage device: PowMr ESS all in one energy storage system, which integrates lithium battery energy storage on base of the inverter charger.
All in one design
This energy storage system is equipped with 6.2KW inverter, solar charger and two 5kwh lithium iron phosphate batteries, easy to install, space saving, simple appearance and not easy to accumulate dust.
Equipped with 2 LiFePO4 batteries (5kWh,6000 times 80% DoD), supports to connect 4 batteries in parallel at the same time to providing a maximum of 20kwh of power for use.
6200W off-grid inverter
Supports pure sine wave output, convert 48V DC to 220V AC output, 120A MPPT solar controller MAX 500V PV input, suitable for household appliances, power tools and other AC loads.
Multiple working modes
Multiple charging modes, you can charge with generator, PV power, grid power, and you can set the priority level of power usage.
Component of battery energy storage system
The design of a household battery storage system requires consideration of several factors, not to mention the industrial energy storage system.
Here we do not go into detail about the design of the energy storage system, but briefly explain the composition of the battery storage system with an off grid energy storage system.
A solar panel is a semiconductor device with light-to-electric conversion characteristics. Free charges can be generated within the semiconductor, which move in a directional manner and accumulate, thus forming an electric potential at its two ends and generating an electric current when the two ends are closed with a conductor.
Automatic control equipment used in solar power generation systems to control multiple solar panel arrays to charge batteries and to power solar inverter loads.
An inverter is a device that converts direct current energy (batteries) into alternating current. After this step, household appliances can receive electricity to operate properly.
The main task of the battery pack is to store energy in order to ensure the load power at night or in rainy days. Common batteries mainly include lead-acid batteries, lithium-ion batteries, sodium-sulfur batteries and flow batteries.
Among them, lithium batteries are more widely used and are a class of batteries with lithium metal or lithium alloy as anode material and using non-aqueous electrolyte solution. The number of cycles can be 5000 or more, the response is fast, and it is the highest energy utility battery in the battery.
How does a battery energy storage system work
When the grid works normally, the inverter can directly connect the utility power to the load, and at the same time convert the AC power to DC power and charge the battery, and ensure that the party battery will automatically stop charging when it is fully charged.
When the grid is blacked out, the charging inverter will automatically cut off the connection between the utility and the load, instantly start the inverter, and provide power to the load from the battery via the inverter instead.
What are the benefits of battery energy storage system
Cost-effective use of excess energy generated by renewable energy sources such as wind and solar power.
Excess power generated by renewable energy sources such as solar or wind farms can be stored, ensuring that power is still available in the event of grid failure or extreme weather, for example.
Assists with load balancing and grid support to help balance fluctuations in power demand throughout the day and reduce congestion on the grid.
BESS can improve power quality by smoothing out voltage fluctuations that might otherwise disrupt equipment operation.
BESS is easy to install and is the best choice for users unfamiliar with energy storage systems.