On sunny days in the Hill Country, Tom Cook taps open an app on his phone and watches the power generated from the solar panels on his roof flow to his home — and out to the state power grid.

Pablo Vegas, the CEO of Texas grid operator ERCOT, said supply will be lowest compared to demand around 8 a.m. Thursday. However, about 10,000 megawatts of operating reserves will help keep the lights and heat on, even as demand spikes, according to the ERCOT grid and market conditions .

The aggregated distributed energy resource pilot currently provides about 25.5 MW of energy and almost 20 MW of other reserve services to the Electric Reliability Council of Texas market.