Are battery storage costs based on long-term planning models?
Battery storage costs have evolved rapidly over the past several years, necessitating an update to storage cost projections used in long-term planning models and other activities. This work documents the development of these projections, which are based on recent publications of storage costs.
Does battery storage cost reduce over time?
The projections are developed from an analysis of recent publications that include utility-scale storage costs. The suite of publications demonstrates wide variation in projected cost reductions for battery storage over time.
When will battery cost projections be updated?
In , battery cost projections were updated based on publications that focused on utility-scale battery systems (Cole and Frazier ), with updates published in (Cole and Frazier ) and (Cole, Frazier, and Augustine ). There was no update published in .
What is a good round-trip efficiency for battery storage?
The round-trip efficiency is chosen to be 85%, which is well aligned with published values. Battery storage costs have evolved rapidly over the past several years, necessitating an update to storage cost projections used in long-term planning models and other activities.
How much does a 4 hour battery system cost?
Figure ES-2 shows the overall capital cost for a 4-hour battery system based on those projections, with storage costs of $245/kWh, $326/kWh, and $403/kWh in and $159/kWh, $226/kWh, and $348/kWh in .
Are electric vehicle battery projections based on NREL projections?
In , the National Renewable Energy Laboratory (NREL) published a set of cost projections for utility-scale lithium-ion batteries (Cole et al. ). Those projections relied heavily on electric vehicle battery projections because utility-scale battery projections were largely unavailable for durations longer than 30 minutes.
Cost Projections for Utility-Scale Battery Storage:
Battery storage costs have evolved rapidly over the past several years, necessitating an update to storage cost projections used in long-term planning models and other activities.
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