Energy storage enables solar panel owners to save some of their output for use at nighttime use, supporting renewable energies in power grids.
Energy storage technologies include batteries, flywheels, pumped hydro-storage, compressed air energy storage and thermal energy storage technologies. Some provide short-term energy storage while others can deliver long-duration storage capabilities.
Boosting Renewables
The global energy transition requires a diverse mix of power sources and technologies. One way energy storage can assist this effort is by filling any gaps between fluctuating renewable production and steady demand for power.
Solar panels produce electricity only during daylight hours and wind turbines depend on weather conditions to generate power, while energy storage systems capture and store any extra electricity they generate for later use, enabling grid operators to include greater portions of renewables without creating imbalances in supply or demand.
Business energy storage helps companies reduce energy costs by providing an opportunity to integrate renewables and utility grid power, also known as “peak shaving,” into a strategy to save costs on electricity use. “Peak shaving” refers to charging batteries during less expensive utility rates (e.g. off-peak utility rates) then discharging during peak load periods at cheaper times (such as off-peak utility rates or off-peak load periods to lower electricity costs). Other forms of storage technology like pumping water back behind hydroelectric dams or using compressed air can produce electricity later when needed for production later generation or use by energy users for storage use purposes.
Increasing Reliability
Energy storage systems (ESSs) have become an invaluable asset to modern electric grids, helping balance supply and demand while improving power quality – including reduced surges, sags, outages that damage electrical equipment or incur costly power bills. Fast-response ESSs provide additional services by helping maintain frequency on an instantaneous basis.
ESSs can also assist variable or intermittent resources like wind and solar, by charging when there is excess generation and discharging during periods of increased demand, helping these resources better align with electricity demand without needing new pollution-emitting peak power plants.
ESSs may help commercial and industrial electricity consumers reduce end-user demand charges by storing power during periods of high electricity demand, making business sense in regions with high energy prices during these peak demand times.
Increasing Access to Electricity
Energy storage enables electricity to be stored until its usage is necessary, creating new efficiencies and capabilities in electric power grids and offering benefits to consumers.
Energy storage technology can facilitate a swifter transition to renewables in markets with high electricity prices, as well as reduce demand charges based on peak consumption periods for commercial and industrial customers.
Energy storage provides an invaluable service in rural and island communities that lack a central electrical grid, helping businesses continue operations without interruption, residents to save valuable foods and medicines from waste, and households to avoid high demand costs from interruptions of service.
Energy storage technology can also enhance the performance and reliability of existing fossil fuel power plants by replacing costly, pollutant-emitting “peaker” plants that only need to operate during certain parts of the year.
Increasing Sustainability
Energy storage aims to facilitate our transition away from fossil fuels by providing flexibility to the grid, thus enabling uninterrupted power to consumers whenever and wherever it’s required – this ensures maximum reliability and resilience for this system.
Renewables become more cost effective through energy storage by smoothing out their delivery of variable or intermittent resources such as wind and solar, such as by storing excess power generated when sun shines or wind blows and returning it when required into the grid.
Energy storage can increase grid efficiency by performing ancillary services like frequency regulation and voltage support, which ensure the grid hums at an appropriate speed and guarantees appliance compatibility while reducing pollution-emitting peak power plants.
Energy storage can also help postpone or avoid expensive and disruptive transmission line upgrades by allowing solar generation to be stored and deployed locally – this can be accomplished by co-locating solar and storage projects together, creating community level microgrids or resilience hubs, etc.