SMT Energy and FlexGen turn on Houston IV: 160 MW battery commissioned in six weeks.

SMT Energy, with FlexGen software and project-delivery services, announced on 9 September 2026 the operational start of Houston IV, a 160-megawatt utility-scale battery energy storage facility in Houston, Texas. FlexGen’s own release is the primary opened source; Energy-Storage.News’s April Bonner report the next day (dated 10 September, covering the 9 September announcement) confirms the 160 MW / 320 MWh sizing, the six-week commissioning claim, and Irby Construction Company’s EPC role.

The mechanism is accelerated commissioning, not a new chemistry. FlexGen describes One-Touch Commissioning as pre-configuring and lab-testing systems, then finishing field commissioning with remote assistance from a Remote Operations Center and a dedicated field team. Jason Rislov, FlexGen senior vice president of operations, said in the company release that what used to take 25-plus weeks took six. Henry Hernandez, SMT Energy director of construction, said Houston IV turned on faster than any other battery storage plant in the company’s history and credited quality at every stage from procurement to commissioning. Shaun Coleman, Irby Construction project manager, said the three teams kept engineering, procurement and construction workstreams aligned under an accelerated pace.

Money and timeline colour from Energy-Storage.News: SMT secured $135 million for Houston IV in February 2025; in May, SMT and utility CenterPoint Energy broke ground. Soft FLAG: CenterPoint is named in the Energy-Storage.News construction-start line; the FlexGen release itself centres SMT, FlexGen and Irby without restating the CenterPoint groundbreaking sentence — both attributed.

Portfolio context: Houston IV joins over a dozen SMT–FlexGen projects supporting the ERCOT grid, totaling more than 300 MW of battery storage capacity on FlexGen’s wording. Energy-Storage.News puts the ERCOT hourly peak-load record at 91.1 GW on 22 July 2026 (EIA), 6% above the prior 85.5 GW peak of 10 August 2023 — market-and-grid colour attributed to that outlet’s EIA citation, not a desk forecast. Soft FLAG on freshness: the operational-start announcement is 9 September; The Cool Down’s 15 September consumer write-up and this pack’s 16 September filing recirculate that start, they do not invent a second COD.

An earlier FlexGen–Trina Storage Houston project of about 371 MWh (April 2025 partnership note in Energy-Storage.News) is sister context only. FlexGen’s June note that it is entering European markets (Nordics, UK, Portugal, Ukraine) is likewise background, not today’s Texas COD.

ERCOT programme colour in the Energy-Storage.News wrap: in May the grid operator moved a Nodal Protocol Revision Request (NPRR) to encourage battery and other inverter-based resources to adopt grid-forming / advanced grid-support technology, with staff describing a one-time incentive window inside 18 months of award notification. That is background on why ERCOT wants faster, better-behaved storage — not a claim that Houston IV itself was awarded that incentive. Soft FLAG: do not print Houston IV as an NPRR winner unless a later filing says so.

The Cool Down’s 15 September consumer piece repeats the six-week / 160 MW / 320 MWh start and the SMT–FlexGen–Irby stack, citing Energy-Storage.News; it adds no independent COD clock beyond that chain. Soft FLAG: Cool Down’s “mid-September” and “come online in 6 weeks” headlines can blur announcement date versus construction duration — the opened FlexGen primary pins operational start announcement to 9 September and commissioning duration to six weeks.

What to watch without mood: any ERCOT interconnection or performance filings that publish Houston IV’s first full operating month; further SMT–FlexGen Houston-area COD notices; whether the six-week commissioning claim is repeated on subsequent projects with published baselines.

Floor: Houston IV online — 160 MW / 320 MWh; six-week commissioning (vs 25+ week baseline on FlexGen’s telling); Irby EPC; ERCOT portfolio >300 MW SMT–FlexGen.