Inverter ALLTOP-STN30224
Solar inverter is a critical component in solar power systems, converting the direct current (DC) electricity gener...
With the increasing global attention to renewable energy, solar energy storage systems are becoming a popular choice for energy conservation and emission reduction for households and businesses. Many people know about "solar power generation", but are still confused about how to "store" solar energy and use it when needed.
What is a solar energy storage system?
A solar energy storage system is a solution that stores excess electricity generated by solar panels for subsequent use. This system usually contains one or more solar cells (Battery) that can supply power when there is insufficient sunlight or when electricity consumption is at peak.
Traditional solar energy systems face energy waste when they generate more electricity during the day and consume more electricity at night. The existence of energy storage systems solves this contradiction of "peak power generation and peak power consumption" and improves overall energy efficiency.
Why do we need a solar energy storage system?
The advantages of installing a solar energy storage system are not only to save electricity bills, but also to bring the following far-reaching values:
1. Improve energy self-sufficiency (Energy Independence)
You can reduce or even completely get rid of your dependence on the public power grid, especially in today's rising energy prices. This independence is very attractive.
2. Continuous power supply when the power grid is out (Backup Power)
When there is a power outage, the battery can immediately take over the power supply to ensure the continuous operation of key equipment such as lighting, refrigeration, and communications, which is particularly suitable for areas prone to natural disasters.
3. Maximize Solar Usage
No need to send excess electricity back to the grid (some countries do not have a perfect net metering mechanism yet), store it directly in the battery for emergency use.
4. Reduce Carbon Footprint
Every kilowatt-hour of solar power you use is a step to reduce dependence on fossil fuels.
Main components of solar energy storage system
A standard solar energy storage system consists of the following key components:
1. Solar Panels
Installed on the roof or open space, it converts sunlight into direct current (DC). This is the "generator" of the entire system.
2. Inverter
Converts the direct current (DC) generated by the solar panel into alternating current (AC) for household use, and may also be used to convert the battery energy storage output into AC.
3. Battery Storage
The "energy warehouse" of the system. When there is excess electricity during the day, it stores this electricity. Common battery types include:
Lithium-ion battery: high efficiency, long life, small footprint, is the current mainstream choice.
Lead-acid battery: low cost, but short service life, suitable for users with limited budget.
Flow battery: suitable for large-scale industrial energy storage projects, long cycle life, but expensive.
4. Charge Controller
Protect the battery from overcharging or discharging, and extend the battery life (integrated in the inverter in some systems).
5. Energy Management System
Real-time monitoring of power generation, energy storage status, power usage, etc. through mobile phone apps or web platforms, allowing users to easily grasp energy consumption data.
What is the operation process of the energy storage system?
The operation logic of the solar energy storage system at different time periods throughout the day is as follows:
During the day:
Solar panels generate electricity under sunlight;
Electricity is first supplied to households or industrial electricity;
Excess electricity is automatically stored in the battery.
At night or rainy weather:
When the sun cannot generate electricity, the system automatically switches to battery power;
If the battery is exhausted, it automatically switches to the public power grid.
When the battery is fully charged:
If the area supports net metering, the system will feed back excess power to the grid and users will receive a discount on their electricity bills;
If net metering is not supported, the system will control power generation or prioritize power storage.
Does everyone need a solar energy storage system?
Although energy storage systems are relatively expensive, they are especially recommended in the following situations:
Live in areas with frequent power outages or natural disasters
Do not enjoy net metering policies and cannot sell excess power back to the grid
Want to achieve an off-grid system and achieve complete energy independence
Expect to maximize return on investment (ROI) and reduce energy expenses
