Grid-Scale Battery Storage In US Tripled In 2021


This week, the US Power Data Company posted preliminary findings from its newest vitality survey, which collects generator-level particular details about present and deliberate mills and related environmental gear at electrical energy vegetation with 1 megawatt or higher of mixed nameplate capability. The ultimate report is because of be launched September 1.

In a press launch, the EIA mentioned the capability of utility-scale battery storage greater than tripled in the US throughout 2021, from 1.4 gigawatts (GW) on the finish of 2020 to 4.6 GW. Though battery programs have a number of widespread purposes, the most recent survey finds extra of them are getting used to retailer electrical energy when costs are low and discharge electrical energy when costs are excessive, a technique generally known as worth arbitrage.

Throughout 2021, 59% of the 4.6 GW of utility-scale US battery capability was used for worth arbitrage, up from 17% in 2019. In sure markets, worth arbitrage is extra widespread than in others. For instance, greater than 80% of the battery capability added in 2021 within the California Unbiased System Operator service territory was used for worth arbitrage.

Batteries additionally assist keep grid reliability. For instance, batteries can be utilized to manage frequency, that’s, they assist keep the grid frequency of 60 cycles per second. Deviations from that frequency can result in energy surges or different forms of grid instability. Batteries are nicely suited to frequency regulation as a result of they don’t require any startup time they usually can shortly take in energy surges. Frequency regulation remains to be the commonest storage battery utility in the US, in keeping with EIA.

Equally, batteries that assist ramp era and supply spinning reserve can steadiness electrical energy provide and demand for durations starting from a number of seconds to a couple hours, relying on the necessities of adjusting electrical energy demand and generator outages.

Batteries may also counter extra wind and photo voltaic era in some markets. To do that, batteries take in extra photo voltaic or wind era when demand is low after which discharge it later when demand is excessive. Battery storage is usually paired with renewable sources in the US. Actually, the EIA survey discovered that greater than 93% of grid scale battery capability that got here on-line in 2021 was co-located with solar energy vegetation.

Be aware: If you’re questioning why the US EIA experiences battery installations in GW and never GWh, we questioned the identical factor. Apparently, the length of storage was not an element within the newest survey. Appears odd, however perhaps they know extra about their enterprise than we do. In any occasion, it’s what it’s. Battery storage within the US is approach up and that’s a great factor.


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