A Texas coal mine is being converted into a 1.2 GW solar farm with 1.6 GWh of battery storage — the largest brownfield solar project in North America — but the same investment firm is simultaneously planning at least 800 MW of gas-fired generation on the site, illustrating the tension between renewable expansion and fossil fuel persistence in the state’s energy transition.
The Big Rooter project, rising on 10,000 acres adjacent to the Twin Oaks coal plant and Calvert surface mine, will deploy 491 MW by August 2028 and the remaining 658 MW a year later, alongside an upgraded substation and 20 miles of extra-high-voltage transmission. Its scale reflects a broader shift: Texas solar is on track to generate more electricity than coal this year, driven by relentless demand from data centers, manufacturing, and cooling loads. Brownfield redevelopment like this avoids greenfield land conflicts and leverages existing grid interconnections, a model increasingly favored by developers and regulators alike.
Yet the project’s backer has also secured gas infrastructure and fuel access to build substantial gas-fired capacity, marketed to the same data center customers seeking firm power. This dual strategy — solar-plus-storage alongside new combustion turbines — captures the central dilemma of the current market: renewables are winning on economics and deployment speed, but gas retains a foothold through reliability narratives and the urgency of load growth that outpaces storage duration and transmission build-out.
The result is a transition that moves forward and backward simultaneously. Every gigawatt of solar added to the ERCOT grid displaces coal and reduces emissions, yet new gas plants lock in decades of carbon intensity and methane leakage risk. For Texas to approach a true electrostate — where electricity becomes the primary energy carrier across sectors — the economic and regulatory signals must favor long-duration storage, demand flexibility, and transmission over incremental fossil infrastructure. Projects like Big Rooter prove the technical and commercial viability of massive renewable repurposing; the next test is whether policy and market design can make the clean half of the equation the only one that pencils out.
Read the full report at Energy Central.