Why BESS is Key to a Greener Future

In today’s energy transition, renewables are set to dominate, but their intermittent nature creates limits. To overcome the issue energy storage is a key solution. There are many technologies to store energy but Battery Energy Storage Systems (BESS) provide a breakthrough solution, ensuring reliability, stability, and round-the-clock clean power by fastest responce and taking lesser time in commossining. Among all storage options, lithium-ion batteries lead the way with unmatched efficiency, scalability, and proven performance.

Sustainable Energy Solutions

Manage energy consumption smartly to promote sustainable practices and reduce waste.

Power When You Need It

Get reliable power supply whenever necessary, making sure you’re never left in the dark.

The Benefits of BESS in Daily Life

Integrating Battery Energy Storage Systems into your daily life brings significant benefits. You can save on energy bills and gain greater control over your energy usage. Picture utilizing solar energy during the day and accessing it at night. This isn’t just storage; it’s a move towards sustainability.

Cost Savings

Enjoy predictable bills without surprises!

Types of Batteries

For utility-scale energy storage in 2025, cutting-edge, high-efficiency Lithium-Ion (Li-ion) batteries remain the most profitable, scalable, and reliable solution due to their state-of-the-art energy density and ability to deliver transformative performance for rapid-response applications like grid stabilization and renewable integration. Pioneering Flow (Vanadium) and revolutionary Sodium-Sulfur (NaS) batteries provide resilient, long-duration, climate-smart storage, though they require advanced infrastructure. Traditional lead-acid batteries lag in efficiency and durability, making them less suitable for modern energy demands. Emerging next-generation Sodium-Ion technology promises eco-friendly, cost-optimized, and scalable solutions, particularly in regions like India where sustainable resources can enhance carbon-neutral energy security.

🔑 Key Technical Parameters of Battery

1. Battery Chemistry / Type
   • Lithium-ion (Li-ion: LFP, NMC, NCA)
   • Lead-Acid (VRLA, AGM, Gel)
   • Flow batteries (Vanadium Redox, Zinc-Bromine)
   • Sodium-ion, Nickel-Cadmium, etc.
2. Nominal Voltage (V)
   • Rated voltage of a single cell or complete battery pack.
3. Capacity (Ah / Wh / kWh / MWh)
   • Amount of charge or energy the battery can store.
   • Ah (Ampere-hour) → total charge.
   • Wh/kWh (Watt-hour) → total energy = Voltage × Capacity.
4. Energy Density
   • Gravimetric (Wh/kg) → energy per unit weight.
   • Volumetric (Wh/L) → energy per unit volume.
5. Power Rating (kW / MW)
   • Maximum power battery can deliver at once.
6. Depth of Discharge (DoD %)
   • Percentage of total capacity that can be safely used without damaging battery.
7. Cycle Life
   • Number of charge–discharge cycles battery can undergo before capacity drops (usually to 70–80%).
8. Round Trip Efficiency (RTE %)
   • Ratio of energy retrieved vs. energy stored. (Li-ion: 85–95%).
9. Charge/Discharge Rate (C-rate)
   • Speed of charging/discharging relative to capacity.
   • Example: 1C means full charge or discharge in 1 hour.
10. State of Charge (SoC %)
    • Instantaneous charge level of the battery.
11. State of Health (SoH %)
    • Condition of the battery compared to new (capacity retention, internal resistance).
12. Temperature Range
    • Safe operating temperature (usually -20°C to +60°C for Li-ion).
13. Self-Discharge Rate
    • Loss of charge when battery is idle.
14. Safety Features
    • Overcharge/over-discharge protection.
    • Thermal runaway resistance.
15. Response Time
    • How fast battery delivers power (milliseconds for Li-ion).

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Initiatives and support at national level

The Government anticipates a strong need for battery storage to overcome the intermittency of renewable energy and ensure round-the-clock reliable supply. With surplus solar power available at low cost during daytime and high demand during non-solar hours, storage is recognized as the key solution to balance supply, reduce curtailment, and avoid dependence on costly peak power. In this context, following initiatives have been taken:

1. CEA has issued an advisory on “Colocating Energy Storage Systems with Solar Power Projects to Enhance Grid Stability and Cost Efficiency” on 18.02.2025.
2. MNRE published guidelines for purchase of RE power with Energy storage system on 09.06.2023
   

Commercial Benefits of Battery Storage:

Solar generation is typically concentrated during peak sunlight hours, creating surplus power in the market. During these periods, market prices fall significantly, often as low as ₹1–2 per unit. However, during non-solar hours, when demand is higher and renewable generation is low, market prices can rise sharply—sometimes up to ₹10 per unit. By utilizing battery storage, surplus low-cost power can be stored and later discharged during high-demand periods. This not only allows power utilities and consumers to avoid purchasing expensive peak-hour electricity but also creates an opportunity for energy arbitrage, thereby improving overall cost efficiency and profitability.

BESS Limitations:

While battery energy storage is key for a reliable renewable grid, it comes with challenges—high installation costs, limited lifespan, space and energy constraints, efficiency losses, safety risks, environmental impact, and dependence on scarce materials like lithium and cobalt. It also required to follow waste management rules Careful planning and management are essential to maximize benefits.