Renewable energy is reshaping how we power our homes and offices. But what if the sun doesn’t shine or the windmills don’t perform well? That’s where Battery Energy Storage Systems (BESS) empower renewable energy plants.
The BESS stores renewable energy (solar, wind, hydropower, and more) to use at night, during power cuts, or unavailability of sufficient sunlight. In this post, we have discussed everything about the Battery Energy Storage System in India: meaning, types, benefits, and working mechanism.
What Are Battery Energy Storage Systems (BESS)?
The purpose of the BESS battery energy storage system is to store energy efficiency and release it smartly to avoid any energy shortage. The BESS is set up beside the solar panels to create an efficient energy flow system. The Solar battery storage system plays a critical role in making solar energy available at night or when sufficient energy is not produced.
The Battery Energy Storage Systems include hardware and software components working in sync to store electrical energy and release it on demand. It is necessary to create an independent system at home or on a utility scale. The BESS scale can range from kilowatt (kW) to megawatt (MW) or more.
The components of a Battery Energy Storage System (BESS) are:
- Battery Modules: The cells where energy is physically stored
- Battery Management System (BMS): Monitors cell health, temperature, voltage, and state of charge
- Power Conversion System (PCS) / Inverter: Converts DC energy stored in batteries to AC power for use in homes and businesses
- Energy Management System (EMS): The intelligent control layer that optimises when to charge, store, and discharge
- Grid Controller: Manage the flow of electricity between the grid and batteries, allowing stable energy distribution
What Are The Types Of BESS Battery Energy Storage Systems?
There are different types of BESS available in the market suitable for different needs, budgets, and climates. Understanding the difference helps you pick the right one for your system.
Lithium-Ion Batteries (Li-Ion)
The Li-Ion batteries are one of the most popular choices for rechargeable solar battery storage in Indian homes and small businesses. While they have a slightly higher upfront cost, they are widely known for their long-life cycle, with at least 2000 charging cycles. Lithium Iron Phosphate (LFP) and Lithium Nickel Manganese Cobalt Oxide (NMC) are popular alternatives to this battery.
Benefits of using Lithium-Ion Batteries (Li-Ion) in BESS:
- Higher energy density of the battery
- Faster charging
- Requires a small storage space
- Long lifecycle without affecting memory
Flow Batteries
Flow battery overcomes one of the major problems with solid batteries: degradation and lifecycle. In flow batteries, the energy is stored in liquid electrolytes in an external tank. The electrolyte liquid is pumped through a reactor stack to generate energy.
The flow batteries have a higher upfront cost, but they are used because the liquid doesn’t degenerate or get damaged. Therefore, they have a lifespan of more than 20 years. Vanadium Redox and Zinc-Bromine are popular types of flow batteries available in the market.
Benefits of using a Flow Battery in BESS:
- Long lifespan
- Scalable size because of external tankers
- Non-flammable electrolytes make them a safe alternative
Lead-Acid Batteries
Lead-Acid batteries are one of the traditional methods of energy storage. They are known for the lower upfront cost, and thus used for off-grid and budget-friendly BESS. A major drawback of this battery is its efficiency, high maintenance, and lower life-cycle of around 1000 charging cycles.
Benefits of using Lead-Acid Batteries in BESS:
- Affordable prices
- Widely available in the market
- Recyclable design
Sodium-Ion Batteries
The Sodium-Ion Batteries are one of the best alternatives to the classic Lithium-Ion Batteries. They are widely used where sodium is available in abundance. These batteries work efficiently even in high-temperature environments. These batteries are known to have a life span of around 8000 charging cycles.
Benefits of using a Sodium-Ion Battery in BESS:
- Cost-effective alternative
- Environment-friendly, especially where sodium is available
- Safer for usage
How Does The Battery Energy Storage System Work?
The Battery Energy Storage Systems (BESS) system is responsible for effective energy management in both residential and utility-scale projects.
For the simplicity of understanding, we will discuss how BESS works in a solar system. The system operates with all types of renewable energy plants.
Receive Energy
The Power Conversion System (PCS) or Inverter is responsible for receiving and converting the DC energy from the solar panels. The system must convert the solar energy into a format which batteries can use. The steps protect batteries from damage while achieving their optimal performance.
Store Energy
Once converted, the energy is stored in the batteries. The Battery Management System (BMS) carefully controls the rate of charging, monitors cell temperatures, and ensures no individual cell is overcharged to avoid any damage.
Discharge Energy
When the energy is needed, the Energy Management System (EMS) is triggered. It controls the amount of stored energy that needs to be converted into AC to be discharged on the grid. This energy is ready to be used in the home, commercial project, or grid connection.
You can use the Solar battery storage system to store energy when there is sufficient sunlight. Later, use the energy stored in the BESS when energy output drops due to various reasons.
Benefits of Battery Energy Storage Systems (BESS)
Here are a few advantages of the BESS battery energy storage system:
Reliable Power Backup
The BESS offers you a powerful backup to store the surplus energy. This can be used when there is a power shortage, solar system damage, or any other problem that reduces the energy output or affects the grid connection.
Reduce Electricity Bills
By storing cheap solar energy and using it during peak tariff hours (typically evenings and mornings), households and businesses can cut their electricity bills by 40–70%. BESS can help businesses save money when the tariff on electricity supply is high.
Energy Independence & Flexibility
BESS reduces your reliance on third-party energy sources. Thus, you gain the flexibility to discharge electricity when the need arises.
Environment Friendly
The BESS helps you reduce your carbon footprint and reliance on fuel-based electricity. Whether you are a business with sustainability commitments or homeowners who care about the environment, BESS helps you create a sustainable energy system.
Flexible Energy Storing Solution
You can change the size of your battery energy storage system in India as your needs grow. Many BESS have external storage systems that make increasing capacity much easier.
If you have queries related to the Solar battery storage system, Sunora Solar will help you. We have been installing residential and commercial EPC solar projects for 10+ years. Thus, we can help you understand the BESS better. Contact us to know more.
Conclusion
Battery Energy Storage Systems (BESS) have become an essential part of the renewable energy setup. They are used to store the surplus energy to use in times of power cuts, low renewable energy supply, or high tariffs. In a BESS, the energy is received from the grid and stored and maintained using the Battery Management System (BMS). The Energy Management System (EMS) helps with the discharge of the stored electricity. There are different types of BESS available in the market with different charging cycle capacities. The environmental condition, falling battery costs, and rising electricity tariffs are making investing in a solar battery storage system critical. Contact us to know about solar battery storage.
FAQ
What is the BESS battery energy storage system in India?
A Battery Energy Storage System (BESS) in India is an integrated setup of batteries, inverters, and smart management software that stores electrical energy and releases it when needed. BESS can be used for residential, commercial, industrial, and utility-scale grid projects.
What is the difference between a battery and a BESS?
A battery is a device that stores electrical energy and can be used in various devices. BESS is a complete setup to store electricity in a renewable energy plant. A battery is a part of the BESS along with other components like the Battery Management System (BMS), Power Conversion System (inverter), and Energy Management System (EMS).
What are the types of Battery Energy Storage Systems (BESS)?
There are different types of BESS battery energy storage systems based on their mechanism. The following are a few of the most common types available in the indian market:
- Lithium-Ion (Li-Ion) batteries
- Lead-Acid batteries
- Flow Batteries
- Sodium-Ion batteries
Who uses the BESS battery energy storage system?
A BESS can be used for residential, MSME commercial projects, industrial projects, or even utility-scale renewable energy generation projects.
