Battery Storage Cost Parity 2025: When Solar+Storage Beat Peaker Plants
Reading time: ~9 min read
2025 was the year that battery storage crossed a critical threshold. With lithium-ion battery pack prices falling to record lows, utility-scale deployments shattering previous records, and solar-plus-storage configurations increasingly winning competitive procurements over gas peaker plants, the economics of energy storage underwent a fundamental shift. For electrical contractors, solar installers, and distributors, the implications are profound: storage is no longer a supplementary technology but a core component of the grid.
At PES Supply, we're committed to helping you capitalize on the storage boom. With 50,000+ SKUs from 169 authorized brands, including batteries, inverters, and balance-of-system components, we provide the inventory you need. Standard delivery is 7-10 business days.
The Cost Collapse: Battery Prices Hit Record Lows
The most dramatic story of 2025 was the continued decline in battery costs. According to BloombergNEF's 2025 Lithium-Ion Battery Price Survey, the average lithium-ion battery pack price fell to $108/kWh in 2025, down 8% from 2024 and a staggering 93% lower than in 2010. Despite an increase in battery metal costs, continued cell manufacturing overcapacity, intense competition, and the ongoing shift to lower-cost lithium iron phosphate (LFP) chemistry helped drive prices down ([pv magazine](https://www.pv-magazine.com/2025/12/09/global-lithium-ion-battery-pack-prices-fall-to-108-kwh-says-bnef/), [Canary Media](https://www.canarymedia.com/articles/batteries/chart-surprise-batteries-got-cheaper-again)).
Even more striking was the decline in stationary storage-specific pricing. Battery pack prices for stationary storage applications fell to $70/kWh in 2025, a 45% drop from 2024, making it the cheapest lithium-ion category for the first time. This represented a significant cost advantage over EV-oriented battery packs, reflecting the less stringent form factor and energy density requirements of grid-scale storage ([pv magazine](https://www.pv-magazine.com/2025/12/09/global-lithium-ion-battery-pack-prices-fall-to-108-kwh-says-bnef/)).
Battery Price Trajectory (BloombergNEF)
| Year | Average Pack Price ($/kWh) | Change from Prior Year |
|---|---|---|
| 2010 | ~$1,500 | Baseline |
| 2023 | ~$139 | Declining |
| 2024 | ~$117 | -16% |
| 2025 | $108 | -8% |
With the exception of 2022, battery prices have declined every single year since 2010, when BNEF began tracking the data. The long-term trajectory has been one of relentless cost reduction, and 2025 confirmed that the trend continues ([Canary Media](https://www.canarymedia.com/articles/batteries/chart-surprise-batteries-got-cheaper-again)).
Lazard LCOE+ Analysis: Storage Costs Decline Sharply
Lazard's 2025 Levelized Cost of Energy+ (LCOE+) report, released in June 2025, confirmed the cost decline trend from an independent analytical perspective. The report showed sharp declines in the Levelized Cost of Storage (LCOS) for battery energy storage systems across both hybrid and standalone storage projects, reversing the cost increases seen from 2021 through 2024 and dropping LCOS back to approximately 2020 levels ([Lazard](https://www.lazard.com/news-announcements/lazard-releases-2025-levelized-cost-of-energyplus-report-pr/)).
Key drivers of the cost decline identified by Lazard included:
- Market dynamics: Lower-than-expected EV demand resulting in oversupply of cells
- Technological advancements: Increased cell capacity and energy density
- Manufacturing overcapacity: Continued expansion of cell production capacity outpacing demand
LCOS Trends from Lazard (Utility-Scale Standalone, 100 MW, 4-Hour)
| Metric | Value |
|---|---|
| 2020-2025 LCOS change | 5% decrease (1% CAGR) |
| C&I Standalone (1 MW, 2-Hour) 2020-2025 | 20% decrease (4% CAGR) |
| Overall trend | Sharp YOY declines offsetting 2021-2024 increases |
NREL's 2025 Cost Projections for Utility-Scale Battery Storage provided additional context, projecting storage costs of $152/kWh (low case), $247/kWh (mid case), and $349/kWh (high case) by 2035, declining further to $111/kWh, $184/kWh, and $333/kWh by 2050 ([NREL](https://research-hub.nrel.gov/en/publications/cost-projections-for-utility-scale-battery-storage-2025-update)).
Record Deployments: 19 GW Installed in 2025
The falling costs translated into record deployment volumes. According to Wood Mackenzie's Energy Storage Monitor, the United States installed 18.9 GW and 51 GWh of energy storage capacity in 2025, representing a 52% increase in installations compared to 2024. Since 2019, the nation had installed over 50 GW and 144 GWh of storage capacity ([pv magazine](https://www.pv-magazine.com/2026/03/25/us-installs-record-18-9-gw-of-energy-storage-in-2025/)).
Benchmark Mineral Intelligence, in a report prepared for SEIA, reported slightly different figures (due to different counting methodologies) — 28 GW / 57 GWh — representing a 29% jump from 2024. The utility-scale segment was the primary engine of growth, accounting for 16 GW / 50 GWh, while behind-the-meter installations (residential, commercial, and industrial) constituted 12 GW / 8 GWh ([Utility Dive](https://www.utilitydive.com/news/600-gwh-of-us-energy-storage-expected-by-2030-benchmark-seia/813638/)).
2025 Storage Deployment Breakdown
| Segment | Power (GW) | Energy (GWh) | YoY Change |
|---|---|---|---|
| Utility-scale | 16 | ~50 | Dominant segment |
| Residential | 2.7 | — | +92% YoY (WoodMac) |
| Commercial & Industrial | — | 95.6 MW | Smaller but growing |
| Total (WoodMac) | 18.9 | 51 | +52% YoY |
| Total (Benchmark/SEIA) | 28 | 57 | +29% YoY |
The U.S. crossed the 35 GW threshold in July 2025 and passed 40 GW in the third quarter, according to the American Clean Power Association. This exceeded a goal set in 2017 by the Energy Storage Association (now part of SEIA) to reach 35 GW by 2025. The industry was on track to deliver approximately 15 GW of new storage capacity for the year, significantly exceeding the earlier target of 9.2 GW ([Canary Media](https://www.canarymedia.com/articles/energy-storage/grid-storage-industry-crushes-2025-goal)).
The final quarter of 2025 set a record for quarterly activity with 5.8 GW and 14.8 GWh deployed across all segments. Residential storage crossed the 1 GWh threshold for the first time in a single quarter ([pv magazine](https://www.pv-magazine.com/2026/03/25/us-installs-record-18-9-gw-of-energy-storage-in-2025/), [Utility Dive](https://www.utilitydive.com/news/energy-storage-installations-capacity-battery-obbba/808115/)).
Solar+Storage vs. Gas Peaker Plants
The cost declines and deployment surge meant that solar-plus-storage configurations increasingly competed head-to-head with — and won against — natural gas peaker plants in utility procurement processes. Several factors drove this shift:
Why Solar+Storage Is Winning
- Lower LCOE: BloombergNEF's global benchmarks showed that fixed-axis PV remained the cheapest source for new generation, with battery storage now cheaper than coal in many markets. Solar-plus-storage configurations could deliver firm capacity at competitive rates ([BloombergNEF](https://about.bnef.com/insights/clean-energy/solar-set-to-rule-worlds-power-supply-three-things-to-know/)).
- Faster deployment: Battery storage projects can be deployed in 12-18 months, compared to 3-5 years for new gas peaker plants, allowing utilities to address capacity needs more quickly.
- Operational flexibility: Batteries provide grid services including frequency regulation, voltage support, and capacity that gas peakers cannot easily match.
- Declining gas peaker utilization: As more solar comes online, the windows when gas peakers are needed (and profitable) are shrinking.
- Policy support: The OBBBA preserved the storage Investment Tax Credit through 2033, providing long-term policy certainty for storage investments ([Lazard](https://www.lazard.com/news-announcements/lazard-releases-2026-levelized-cost-of-energyplus-report-pr/)).
Storage capacity in interconnection queues now outnumbers gas power by a factor of 6.5, according to data compiled by LBNL, signaling that developers overwhelmingly see storage as the future of capacity additions. As one industry leader noted, "Storage has become the dominant form of new power addition... it's fair to say that batteries are how America does capacity" ([Canary Media](https://www.canarymedia.com/articles/energy-storage/grid-storage-industry-crushes-2025-goal)).
Solar-Storage Co-location Trend
By Q1 2026, SEIA reported that 48% of installed utility-scale energy storage capacity was co-located with solar generation, while 51% was standalone (with the remainder co-located with wind). This near-even split reflected the growing viability of both configurations, with co-located solar-plus-storage benefiting from shared interconnection, land, and balance-of-system costs ([Utility Dive](https://www.utilitydive.com/news/us-energy-storage-installations-hit-q1-record-up-32-year-over-year-seia/821133/)).
Global Context: 112 GW Deployed Worldwide
The storage boom was not limited to the United States. Globally, a record 112 gigawatts of battery storage capacity was installed in 2025, a 48% surge from the prior year and a tenfold increase over 2021. China alone installed more than half of the world's grid battery capacity, while the U.S. accounted for 16%. The pace of global deployment far outstripped earlier projections ([Canary Media](https://www.canarymedia.com/articles/batteries/world-installing-grid-batteries)).
Geographic Concentration and Diversification
Cumulative U.S. storage deployments remained concentrated in a handful of states, though the geographic distribution was beginning to widen:
- California: 60.6 GWh cumulative (largest market)
- Texas: 29.2 GWh (overtook California for new annual installations)
- Arizona: 20.2 GWh
- California, Texas, and Arizona together held roughly 80% of all U.S. battery storage capacity
- Georgia, Iowa, Mississippi, Nevada, New Mexico, Colorado, Oregon, Hawaii, Idaho, and Massachusetts rounded out the top 10, each with at least 1.5 GWh deployed
Thirteen states had established energy storage deployment targets, including California, Massachusetts, and New York ([Utility Dive](https://www.utilitydive.com/news/us-energy-storage-installations-hit-q1-record-up-32-year-over-year-seia/821133/)).
Residential Storage: 51% Growth Surge
The residential storage segment experienced remarkable growth in 2025, increasing 51% year-over-year according to Benchmark Mineral Intelligence. The surge was driven by homeowners racing to capitalize on the Section 25D residential tax credit before its expiration at the end of 2025 (the OBBBA ended the 25D credit on December 31, 2025). Residential storage crossed the 1 GWh quarterly threshold for the first time in Q4 2025 ([Utility Dive](https://www.utilitydive.com/news/600-gwh-of-us-energy-storage-expected-by-2030-benchmark-seia/813638/), [pv magazine](https://www.pv-magazine.com/2026/03/25/us-installs-record-18-9-gw-of-energy-storage-in-2025/)).
For residential solar installers, the attachment rate of storage to new solar installations continued to climb, particularly in states with time-of-use rates, net billing policies, or reliability concerns. California, Arizona, and Illinois led residential deployments as attachment rates reached new highs ([Utility Dive](https://www.utilitydive.com/news/energy-storage-installations-capacity-battery-obbba/808115/)).
Flow Battery Commercialization Progress
While lithium-ion dominated the storage market, flow battery technology made meaningful commercialization progress in 2025. The DOE's Long-Duration Storage Shot, launched in September 2021, aimed to reduce costs by 90% in storage systems delivering over 10 hours of duration within one decade. Flow batteries, particularly vanadium redox flow batteries, offered advantages for long-duration applications including:
- Longer duration capability: Flow batteries can economically scale to 8-12+ hours of duration, where lithium-ion costs increase linearly
- Cycle life: Flow batteries offer 10,000+ cycles with minimal degradation
- Safety: Non-flammable electrolyte eliminates thermal runaway risk
- Recyclability: Electrolyte can be reused, reducing end-of-life costs
The DOE's 2022 Grid Energy Storage Technology Cost and Performance Assessment provided LCOS benchmarks for flow batteries alongside lithium-ion, lead-acid, pumped storage hydro, compressed-air, and hydrogen storage, establishing an analytical framework for comparing technologies across durations from 2 to 100 hours ([DOE](https://www.energy.gov/cmei/2022-grid-energy-storage-technology-cost-and-performance-assessment)).
Looking Ahead: 600+ GWh by 2030
Benchmark Mineral Intelligence projected that U.S. energy storage installations would reach 35 GW / 70 GWh in 2026, with 20.2 GW / 62.4 GWh in utility-scale and 14.8 GW / 7.3 GWh in behind-the-meter markets. By 2030, the consultancy expected more than 600 GWh of energy storage on the U.S. grid. At the end of 2025, the U.S. had 137 GWh of utility-scale storage, 19 GWh of commercial and industrial storage, and 9 GWh of residential storage ([Utility Dive](https://www.utilitydive.com/news/600-gwh-of-us-energy-storage-expected-by-2030-benchmark-seia/813638/)).
Wood Mackenzie projected 92.9 GW of storage would be installed in the U.S. over the next five years, with the utility-scale pipeline including 152 GW of projects in databases and 530 GW of projects in interconnection queues as of Q4 2025 ([pv magazine](https://www.pv-magazine.com/2026/03/25/us-installs-record-18-9-gw-of-energy-storage-in-2025/), [Utility Dive](https://www.utilitydive.com/news/energy-storage-installations-capacity-battery-obbba/808115/)).
U.S. Storage Market Outlook
| Metric | 2025 Actual | 2026 Projected | 2030 Projected |
|---|---|---|---|
| Annual Installations (GW) | 18.9 | 35 | — |
| Annual Installations (GWh) | 51-57 | 70 | — |
| Cumulative (GWh) | ~165 | — | 600+ |
| Utility-scale pipeline in queues | 530 GW | — | — |
Policy and Supply Chain Considerations
While 2025 was a banner year for storage, there were headwinds on the horizon. Lazard's 2026 LCOE+ report (released in mid-2026) noted that storage costs were beginning to rise again, reversing the 2025 declines. The materialization of tariffs on lithium-ion battery imports curtailed access to low-cost Chinese cell supply, and new Foreign Entity of Concern (FEOC) restrictions accelerated supply chain diversification toward Southeast Asian manufacturing and domestic suppliers. However, the OBBBA's preservation of the storage ITC through 2033 provided long-term policy certainty ([Lazard](https://www.lazard.com/news-announcements/lazard-releases-2026-levelized-cost-of-energyplus-report-pr/)).
These supply chain dynamics mean that contractors and developers should plan for potential cost volatility and lead time variability in battery procurement. Having a diversified supplier base and planning ahead for component availability will be increasingly important.
What This Means for Contractors and Installers
For electrical contractors and solar installers, the battery storage boom creates significant opportunities:
- New service offerings: Storage installation, retrofits, and hybrid solar-plus-storage systems represent growing revenue streams
- Residential demand: Homeowners seeking backup power, self-consumption optimization, and time-of-use arbitrage are driving residential storage adoption
- Grid-scale projects: Utility-scale storage deployments require significant electrical infrastructure including switchgear, transformers, and balance-of-system components
- Safety and code compliance: NFPA 855 (Standard for Energy Storage Systems) and NEC requirements for storage installations require specialized knowledge
- Component sourcing: Having reliable access to batteries, inverters, racking, and electrical components is critical for meeting project schedules
PES Supply offers comprehensive inventory for your storage projects, including battery storage solutions, hybrid and storage inverters, balance-of-system components, electrical panels and switchgear, and safety equipment. With 50,000+ SKUs from 169 authorized brands and delivery in 7-10 business days, we're your trusted partner for energy storage projects.
Frequently Asked Questions
At what battery cost per kWh does solar+storage become cheaper than peaker plants?
Lazard's 2025 LCOE+ report shows battery storage at $108-153/kWh has already reached cost parity with natural gas peaker plants ($152-225/MWh). Below $100/kWh — projected by BNEF for 2027 — solar+storage is definitively cheaper for peak-hour dispatch.
Does the standalone storage ITC apply to residential systems?
Yes. The IRA's standalone storage ITC applies to systems of at least 3 kWh, whether residential or commercial. The 30% base credit is available with additional 10% bonuses for domestic content and energy community locations.
How does the OBBBA affect storage tax credits?
The One Big Beautiful Bill Act, signed July 4, 2026, tightens FEOC (Foreign Entity of Concern) requirements for battery components. Systems using Chinese-sourced cells may lose ITC eligibility after 2026, accelerating demand for domestic and allied-nation supply chains.
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- EG4 100Ah WallMount Battery Paralleling Cable Kit EG4PARACABLE100A
- BYD 144 TOPCon Cells Black/Silver 580w Solar Panel - NLBK-36 555-580W
- Fortress eFlex Max - 5.4kWh 51.2V Battery
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Sources
- Lazard - 2025 Levelized Cost of Energy+ Report
- Lazard - 2026 LCOE+ Report (tariff and FEOC analysis)
- pv magazine - Global Lithium-Ion Battery Pack Prices Fall to $108/kWh
- NREL - Cost Projections for Utility-Scale Battery Storage: 2025 Update
- DOE - 2022 Grid Energy Storage Technology Cost and Performance Assessment
- BloombergNEF - Solar Set to Rule World's Power Supply
- pv magazine - US Installs Record 18.9 GW of Energy Storage in 2025
- Utility Dive - 600+ GWh of US Energy Storage Expected by 2030
- Utility Dive - 2025 on Track for Record Storage Deployments
- Utility Dive - US Energy Storage Installations Hit Q1 Record
- Canary Media - Grid Storage Industry Crushes 2025 Goal
- Canary Media - The World Is Installing Grid Batteries at a Blistering Pace
