Texas's Newest 100 MW Battery Runs on Pure Merchant Gamble, With No Grid Reliability Contract in Sight

Equinor announced this week that its wholly owned subsidiary East Point Energy has brought the 100 MW/200 MWh Citrus Flatts Energy Center online in Harlingen, Cameron County, Texas.^[1][3] The battery is the company's largest US storage asset to date and the second of two projects East Point is now operating in Texas, the first being the 10 MW/20 MWh Sunset Ridge facility in Frio County that reached commercial service in 2025.^[2][3] Together, Equinor claims, the two batteries can power about 30,000 Texas homes for up to two hours.^[1][5] On its surface, this looks like grid backbone infrastructure: flexible capacity when demand spikes or solar clouds over.

But read the business model, and you see the real story. Citrus Flatts operates on a fully merchant basis in the ERCOT market.^[3][6] No utility contract. No capacity payment. No obligation to be online when Texas needs it most. Instead, Equinor's trading subsidiary Danske Commodities handles market operations and portfolio optimization, buying power when ERCOT prices fall and selling it back when prices rise.^[3][5] That is pure arbitrage: the battery earns money by exploiting price spreads that reflect scarcity, not by promising to be there when the grid is stressed. Under merchant dispatch, the battery's operator profits when spreads are wide, exactly the hours when ERCOT is tight and when a grid-contracted asset would be required to discharge. The incentives are inverted.

This is not a bug in Texas's battery boom; it is the default. Most new storage in ERCOT is now built on merchant terms, chasing the same price play.^[9] That choice has consequences. A household battery, by contrast, is paid for and retained by the homeowner, who captures the full value of outage avoidance and tariff immunity. A utility-scale battery on merchant terms captures only what the market pays that hour and is free to sit idle when prices collapse, even if that is when the grid is most vulnerable. The arbitrage math works until it doesn't: if price spreads compress, if competing batteries flood the market, or if a storm hits during a low-price trough, the merchant operator's returns evaporate. ERCOT has no recourse. Texas ratepayers do not benefit from the battery's mere existence; they benefit only if it happens to be dispatched when they need it.

The honest cost is hidden in the framing. Equinor and East Point will earn revenue by the amount of energy cycled times the price spread plus any ancillary service payments. That revenue flow does not require the battery to discharge during a summer peak or a winter cold snap. It requires only that price divergence exists. The grid's actual reliability value, the hours of capacity when the system is stressed, goes unpriced and uncontracted. Utilities in ERCOT do not bid for that reliability; they assume the merchant market will provide it out of self-interest. That assumption held when battery capacity was scarce and spreads were fat. As more merchant batteries come online, and as solar flattens mid-day prices, spreads compress and the incentive to hold charge for high-price hours weakens. A merchant battery is a bet on price volatility, not a commitment to grid resilience.

The buildable alternative exists and is already proven: ERCOT utilities could contract for capacity on a fixed or indexed long-term basis, the way Texas utilities have done for conventional peaking plants for decades. The California Independent System Operator uses capacity auction mechanisms to procure storage at known, auditable costs; the battery operator receives a fixed $/kW-year payment and must be available on call. That introduces a contract cost, which shows up in the rate base and is visible to ratepayers. The merchant model obscures the cost by distributing it across spread arbitrage, which feels like market efficiency until a heat wave or a storm exposes that no one was paid to be there. Equinor's choice to build merchant rather than contracted reflects the current ERCOT market design, not a technical superiority of speculation over reliability procurement.