Qstor™ Battery Energy Storage Systems

Supports Renewable Energy: Helps manage the variability of solar and wind energy.

Grid Stability: Balances energy supply and demand.

Cost Savings: Reduces electricity costs by shifting energy use to off-peak times.

Backup Power: Provides reliable power during outages.

Environmental Benefits: Reduces reliance on fossil fuels when paired with renewables.

The largest Battery Energy Storage System (BESS) project in the world is the Edwards & Sanborn solar-plus-storage project in California. It has a storage capacity of 3,287MWh and is paired with 875MWdc of solar PV. Located on 4,600 acres in Kern County, the project uses battery units from LG Chem, Samsung, and BYD. It surpasses the previous largest BESS at Moss Landing, also in California, and is designed to enhance grid resilience while supporting renewable energy integration.

Energy is stored in a battery during the charging process. Electricity is converted into chemical energy, which is held within the battery until it is needed. When discharged, this chemical energy is converted back into electrical energy for use.

The cost of a BESS depends on factors such as size, battery type, and application. Larger systems and advanced battery technologies tend to cost more, but prices are declining as the industry grows and technology improves.

Energy Storage Duration: Batteries typically store energy for a few hours, though some technologies are designed for longer durations.

Lifespan: The typical lifespan of a BESS depends on the battery type, maintenance, and usage patterns, but it generally lasts several years.

Frequency Regulation: Keeps the grid stable by quickly responding to fluctuations in supply and demand.

Energy Shifting: Stores excess energy during low-demand times and releases it during high-demand periods.

Renewable Energy Support: Helps integrate solar and wind energy by smoothing out their variability.

Black Start Capability: Restores power to the grid after a blackout.

Batteries: The core component where energy is stored in chemical form and converted back into electricity when needed. Common battery types include lithium-ion, lead-acid, and flow batteries.

Battery Management System (BMS): Ensures safe and efficient operation by monitoring and controlling factors such as temperature, voltage, and state of charge.

Power Conversion System (PCS): Includes inverters and converters to transform direct current (DC) stored in batteries into alternating current (AC) for grid use, and vice versa during charging.

Energy Management System (EMS): Manages the overall operation of the BESS, including energy dispatch, grid interaction, and optimization of performance.

Thermal Management System: Regulates the temperature of the batteries to prevent overheating and ensure optimal performance and safety.

Protection and Safety Systems: Includes fire suppression, fault detection, and isolation mechanisms to prevent hazards like thermal runaway or electrical faults.

Communication and Control Systems: Enable remote monitoring, diagnostics, and integration with the power grid or renewable energy sources.

Renewable Energy Integration: BESS store excess energy generated by intermittent renewable sources like solar and wind during periods of low demand. This stored energy can be discharged when renewable generation is low or demand is high, ensuring a consistent energy supply.

Grid Connection: BESS are connected to the power grid to provide services such as energy dispatch, frequency regulation, and load balancing. They can absorb surplus energy from the grid or release stored energy to meet demand.

Peak Shaving: BESS help reduce the strain on the grid by supplying energy during peak demand periods, minimizing the need for fossil-fuel-based peaker plants.

Microgrid and Off-Grid Applications: BESS can operate in conjunction with renewable energy sources in microgrids or off-grid systems, providing reliable power in remote areas.

Frequency Regulation: BESS respond rapidly to fluctuations in grid frequency caused by imbalances between supply and demand. By either absorbing or supplying energy, they help maintain the grid's target frequency (e.g., 50Hz or 60Hz).

Voltage Support: BESS can provide reactive power to stabilize grid voltage levels, especially during sudden changes in load or renewable energy output.

Fast Response Time: Unlike traditional power plants, BESS can respond almost instantaneously to grid disturbances, making them ideal for grid stability services.

Black Start Capability: BESS can assist in restoring power to the grid after a blackout by providing the initial energy needed to restart other generators.

Renewable Energy Support: BESS enable the large-scale adoption of renewable energy by storing excess energy and ensuring its availability during periods of low generation, reducing reliance on fossil fuels.

Peaker Plant Replacement: Utility-scale BESS can replace fossil fuel-based peaker plants, which are typically used to meet demand during peak times. This transition reduces greenhouse gas emissions.

Grid Resilience: BESS improve grid reliability by mitigating the intermittency of renewables and providing backup power during outages, supporting a more sustainable energy system.

Demand Response: By storing energy during low-demand periods and releasing it during high-demand periods, BESS reduce the need for coal or gas plants that would otherwise supply the additional energy.

Electrification of Infrastructure: Utility-scale BESS support the growth of electric vehicles (EVs) and other electrified infrastructure by stabilizing the grid and providing energy when needed.