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Nightpeak doubles Texas battery site to 300 MW with Tesla Megapacks

Nightpeak doubles Texas battery site to 300 MW with Tesla Megapacks

Built World

Second 150 MW phase in Brazoria County begins operating, serving data-center demand

October 13th, 2026: Nightpeak announces completion and financial close

Overview

Updated Oct 31

Nightpeak Energy put its 150 MW Bocanova 2 battery phase into commercial operation on September 17, 2026, doubling the Bocanova site in Brazoria County, near Houston, to 300 MW. The company announced the phase on October 13. The first 150 MW phase began operating in August 2025.

Bocanova 2 uses Tesla Megapack 2 XL units and can discharge at full power for two hours, storing 300 MWh. The site totals 600 MWh. Batteries store power when demand is low and release it quickly when the grid tightens, which matters as ERCOT's summer demand keeps climbing. ERCOT hit a summer peak of 91.1 GW on July 22, 2026, 6.5% above its prior record, according to a October 19 roundup of grid data.

Why it matters

Data centers are driving fast demand growth on the Texas grid; a single 300 MW fast-response battery site shows how ERCOT is adapting.

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Key Indicators

300 MW
Bocanova site power capacity
Doubled from 150 MW when Bocanova 2 entered service on September 17, 2026.
600 MWh
Bocanova site energy storage
Two 300 MWh phases; the site can sustain 300 MW output for two hours.
150 MW
Bocanova 2 capacity
The second phase, online since September 17, 2026, with two-hour duration.
1 GW+
Nightpeak operating and de-risked portfolio
Across gas-fired generation, battery storage, and powered land, as the company describes.

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People Involved

PH
Paris Hays
Co-founder and chief executive / chief development officer, Nightpeak Energy
Leading the company's expansion

Organizations Involved

Nightpeak Energy
Nightpeak Energy
Energy storage and generation developer
Developer of the Bocanova site

California-based developer of gas-fired generation, battery storage, and powered land.
Tesla, Inc.
Tesla, Inc.
Electric vehicle manufacturer
Supplied Megapack 2 XL systems for Bocanova

Makes the Megapack lithium-ion battery systems used at the Bocanova site.
ERCOT (Electric Reliability Council of Texas)
ERCOT (Electric Reliability Council of Texas)
Grid operator
Operator of the Texas grid served by Bocanova

Operates the grid serving most of Texas's electric load.

Timeline

2022 October 2026

6 events Latest: October 13th, 2026 · 4 weeks ago
Tap a bar to jump to that date

  1. Nightpeak announces completion and financial close

    Latest Announcement

    The developer discloses both phases operate and details Bocanova 2's financing from MUFG and U.S. Bank.

  2. Bocanova 2 reaches commercial operation

    Milestone

    The 150 MW, two-hour second phase goes live, doubling the site to 300 MW.

  3. ERCOT sets summer demand record of 91.1 GW

    Measurement

    ERCOT's demand reached 91.1 GW, 6.5% above its prior record of 85.5 GW from August 2024. The peak came during a summer heat wave.

  4. First phase enters service

    Milestone

    The 150 MW Bocanova Power phase begins commercial operation about two years after the interconnection request.

  5. Bocanova interconnection request filed

    Development

    Nightpeak submits the grid interconnection request for the first phase in mid-2023.

  6. Nightpeak Energy founded

    Company

    Paris Hays and co-founders establish the energy developer.

Scenarios

1

Nightpeak's next project hits commercial operation

Likely Resolves by End of 2027

Discussed by: Nightpeak's stated pipeline of more than 1 GW of operating and de-risked capacity plus further development plans

Nightpeak says it holds a further pipeline of flexible generation and large-load projects beyond the Bocanova site. If that pipeline advances as the company describes, its next storage or gas-fired project would reach commercial operation and be announced through its usual press channels.

2

ERCOT battery fleet keeps breaking capacity records

Likely Resolves by Q2 2028

Discussed by: ERCOT demand forecasts and the California-Texas battery dispatch study cited by Energy-Storage.news

ERCOT forecasts continued load growth from data centers through the rest of the decade. The operator has added battery storage rapidly in recent years, and additions have kept climbing as load rises. If the trend holds, reported cumulative capacity keeps rising through 2028.

3

Low gas prices squeeze new battery projects

Unlikely Resolves by End of 2027

Discussed by: Battery economics commentary; the dispatch study finding ERCOT battery operation tracks prices less tightly than California's

Battery revenue in ERCOT depends on capturing price spikes, and cheap natural gas can compress those margins. The dispatch study read ERCOT's looser price tracking as a sign of a younger market. If economics turn unfavorable, some planned storage projects could be delayed or shelved despite demand growth.

Historical Context

2 moments from history that rhyme with this story — and how they unfolded.

February 2021

Winter Storm Uri (February 2021)

A deep freeze shut natural gas, coal, and nuclear plants across Texas, cutting power to millions and leading to more than 200 deaths statewide.

Then

ERCOT overhauled market rules, raised scarcity price caps, and pushed for more dispatchable capacity.

Now

The disaster turned attention to fast-responding resources; battery storage buildout in ERCOT accelerated in the years that followed.

Why this matters now

Uri showed how quickly supply can fall short on the Texas grid, the same risk data-center demand growth now intensifies. Batteries respond in moments, which is why ERCOT is adding them at scale.

December 2020 onward

California's Moss Landing battery buildout (2020s)

Vistra's Moss Landing facility in California became the largest battery storage plant in the world when it began operating in December 2020, storing solar power for evening peaks.

Then

Moss Landing proved that gigawatt-scale storage could be financed, built, and dispatched on a major grid.

Now

California led the United States on battery storage, and the same financing structures now serve Texas.

Why this matters now

Bocanova applies the financing structures and large-format battery systems California pioneered, but in the younger ERCOT market where demand grows faster.

Sources

(10)
+4
PRNewswire Interesting Engineering Energy News Energy-Storage.News Nightpeak Energy SolarBytes Basenor We Are the Frontier The Duck Curve Energy Storage