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How Does Battery Storage Work in Solar Inverters?

Apr 24, 2023
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    In a solar power system, the power battery is an essential part of the installation because it ensures uninterrupted power supply in case of a grid failure. In this article, we will break down the complex operation of these storage devices into several easy-to-understand processes. Our discussion will revolve around batteries that have been matched with solar systems, rather than standalone solar power panels that store power.


    Battery storage in solar inverters works by storing excess energy generated by solar panels during the day for later use, such as at night or on cloudy days. The solar inverter converts the DC power from the solar panels into AC power for immediate use, while the excess energy is directed to the battery storage system. The inverter then manages the charging and discharging of the battery, ensuring that stored energy is released when needed. When the solar panels are not producing enough power, the inverter draws from the stored energy in the batteries to provide a continuous power supply. This setup enhances energy self-sufficiency, reduces reliance on the grid, and optimizes the use of renewable energy.


    What is Battery Storage?


    Battery storage in solar power systems refers to the process of storing excess energy generated by pv solar panels for later use. This stored energy is particularly valuable during times when solar panels aren't producing power, such as at night or on cloudy days. The battery ensures a continuous and reliable power supply, improving energy self-sufficiency and minimizing reliance on the electrical grid.


    The Role of Battery Storage


    The primary role of solar power battery storage is to store excess solar energy for future use. This allows households or businesses to maximize the energy produced during sunny days, ensuring that stored electricity can be drawn upon during times of low solar output. Battery storage enhances the efficiency of solar power systems, reduces energy bills, and provides backup power during grid outages.


    The Application of Battery Storage


    Application AreaDescriptionBenefits
    Renewable EnergyStoring energy generated from renewable sources like solar and wind.- Balances supply and demand
    - Reduces reliance on fossil fuels
    - Enhances grid stability
    Grid StabilizationHelps in maintaining a stable and reliable electricity grid.- Prevents blackouts
    - Manages peak loads
    - Improves power quality
    Electric VehiclesProvides power for electric cars, buses, and other vehicles.- Reduces greenhouse gas emissions
    - Lowers fuel costs
    - Promotes sustainable transportation
    Residential UseHome energy storage systems for backup power and energy management.- Ensures power during outages
    - Reduces electricity bills
    - Increases energy independence
    Commercial UseEnergy storage solutions for businesses to manage energy costs and reliability.- Lowers operational costs
    - Enhances energy efficiency
    - Provides backup power
    Industrial UseLarge-scale energy storage for industrial applications and processes.- Improves operational efficiency
    - Reduces energy costs
    - Supports uninterrupted operations
    TelecommunicationsBackup power for telecom towers and data centers.- Ensures continuous operation
    - Reduces downtime
    - Enhances reliability
    Off-Grid SolutionsEnergy storage for remote areas without access to the main power grid.- Provides reliable power
    - Supports sustainable development
    - Reduces dependency on diesel generators


    Solar equipment inverters provide solar power


    When sunlight hits the panels, visible light is converted into electric energy. Current flows into the battery and is stored as DC power. It is important to note that solar power panels come in two types: AC-coupled and DC-coupled. The latter has a built-in inverter that can convert the current into DC or AC. Thus, DC solar will flow from the panels to an external power inverter, which will convert it into AC power that can be used by your appliances or stored in an AC battery. The built-in inverter will convert AC power back to DC power for storage in this scenario.


    In contrast to DC coupling systems, batteries have no built-in inverter. So, DC power from the solar power panels is routed into the battery via a charging controller. Unlike AC installations, the power inverter in this system only connects to your home wiring. Therefore, energy generated from the solar panel or battery will be converted from DC to AC before flowing to your appliances.


    Charging process of solar equipment inverters


    The energy flowing out from the battery panel of the solar energy equipment inverter will be prioritized for your home's power. Thus, electricity directly powers your appliances such as refrigerators, TVs, and lights. Typically, the energy generated by solar power panels will exceed your requirements. For instance, a lot of electricity may be produced on a hot afternoon, but your house may not consume much electricity. In this case, net metering occurs, where excess energy flows back into the grid. However, you can use this overflow to charge the battery.


    The amount of energy stored in the battery depends on its charging rate. For example, if your home doesn't consume much electricity, the charging process will be fast. Additionally, if you connect to larger panels, a lot of energy will flow into your home, and the battery will charge faster. Once the battery is full, the charging controller will prevent it from overcharging.


    Why use solar equipment inverter batteries?


    Protect you from power outages


    If you're connected to the grid, there will always be a period when the transmission system fails or is shut down for maintenance. In this case, the system will isolate your house from the grid and activate the backup power. The battery will operate like a backup generator in such situations.


    Use time-of-use rate plans


    In this type of plan, you will be charged based on the amount of electricity you use and the time you use it. Energy obtained from the grid at night costs more than the excess energy produced during the day. Therefore, by storing excess energy and using it at night, you can reduce your overall electricity cost.

    Andy Cao
    Andy Cao

    I’m Andy Cao, an energy engineer with over 16 years of hands-on experience in solar inverters, lithium battery energy storage, photovoltaic systems, and solar street lighting. I focus on real-world system performance and write to share practical, experience-based insights for professionals working in the solar energy industry.

    FAQ

    Will the solar lights work all night?

    If you live in a sunny place like South Africa or South America, wholesale solar street lights from Anern can easily last 10 hours at night all year round. In some Northern European countries, solar lights last for a shorter time at night in winter. In these areas, it is expected to last an average of six hours during winter.

    Do you have local agents?

    At present we only do factory direct sales, welcome all customers to order directly from us.

    What types of solar inverters does Anern produce?

    Anern produces several types of solar inverters across multiple product series for different applications:


    Off-Grid Solar Inverters: Designed for areas without grid access or unstable power sources, supporting remote power access 12. For example:


    AN-SCI-PRO Series (2000/3200W models)

    AN-PVI Series (6000/10000W)

    Hybrid Solar Inverters


    IP65-rated Hybrid Inverters: Durable, all-weather inverters for grid-tie/backup systems. Includes AN-SCI-EVO series (e.g., AN-SCI-EVO10200, EVO4200/6200)

    UPS Hybrid Inverters: Models like the 2000-12000W solar inverter with UPS functionality for uninterrupted power supply

    Low Frequency Solar Inverters: Heavy-load industrial inverters for high-power applications. Features include driving pumps, air conditioners, and refrigerators 


    Specific product highlights:

    AN-FGI-DU4200 Series: Hybrid PV inverters for residential/commercial use

    AN-SCI02-PA Series: Off-grid parallel inverters (e.g., AN-SCI02-PA6200)


    Anern produces the following inverter power ratings and types:


    Power Ratings:

    1kW Inverters

    1.5kW Inverters

    2kW Inverters

    3kW Inverters

    4kW Inverters

    4.2kW Inverters

    5kW Inverters

    6kW Inverters

    6.2kW Inverters

    6.5kW Inverters

    7.2kW Inverters

    10kW Inverters

    10.2kW Inverters

    12kW Inverters


    Inverter Types:

    Single Phase Solar Inverter

    MPPT Solar Inverter - Integrated in controllers

    Off Grid Inverter

    Hybrid Solar Inverter

    High Power Inverters (commercial, up to 100KW)

    Commercial Solar Inverter

    UPS Solar Inverter

    Pure Sine Wave Inverter - Fundamental to all models

    Solar Power Inverter for Home - All residential models


    Note: Dual-output and on-grid capabilities are implied through hybrid and UPS systems.


    What markets does Anern serve?

    Anern supplies solar energy products and system solutions to customers in more than 200 countries and regions, supporting residential, commercial, industrial, and off-grid solar power projects.


    Anenr main serve markets:

    Middle East: Iraq, Lebanon, Syria, United Arab Emirates, Afghanistan, Yemen, Saudi Arabia

    Africa: Nigeria, Zambia, Kenya, Mali, Burkina Faso, South Africa, Egypt, Tanzania, Mozambique, DRC, Botswana, Ethiopia, Egypt, Morocco, Cameroon, Zimbabwe, Ghana, Algeria, Libya, Uganda

    Southeast Asia: Philippines, Indonesia, Malaysia, Myanmar, Thailand, Vietnam, Pakistan

    Americas: Colombia, Mexico, Brazil, Peru, Argentina, Chile, Honduras, Ecuador, United States

    Central Asia: Uzbekistan, Kazakhstan, Kyrgyzstan, Tajikistan

    Europe: Ukraine, Türkiye, Germany, Romania, Poland, France


    Note: If you want to distinguish by product, the above regions of the Middle East, Africa, Southeast Asia, and South America are all suitable for solar street lights and energy storage, while Central Asia and Europe are only suitable for solar energy storage products.

    Is Anern a solar inverter manufacturer or a system integrator?

    Anern operates as a solar energy solutions manufacturer, supplying solar inverters as part of integrated solar power systems that combine power conversion, energy storage, and system-level design for various solar applications.

    References
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