Google said it has made its largest purchase of solar power and battery storage to date. The first two phases of the project, located in Arkansas, will generate enough electricity to supply about 6% of the state’s peak demand, the company said earlier this week.

Electricity from the project will flow directly to the grid, offsetting demand from Google’s data centers. Google is investing in the project alongside developer Cypress Creek Energy and purchasing all production from the first two phases, adding 1 gigawatt of solar capacity and 1.9 gigawatt-hours of battery storage to its portfolio.

When completed, the three-phase project will be the largest solar installation in the United States, the companies said. The third and final phase of the project is scheduled to connect to the grid in 2029, bringing the power plant’s total capacity to approximately 1.8 gigawatts of solar energy and 2.9 gigawatt-hours of battery storage. Cypress Creek has secured $3.5 billion in financing to support the first two phases.

The Steel River Energy Center, as the project is called, will be located about 30 miles north of Memphis, Tennessee. By combining solar panels with large batteries, the power plant will be able to supply power to the grid all day, every day. It will also help Google in its quest to match its electricity use with clean energy every hour, a strict measure that should help bring more hybrid power plants to the grid.

Google’s decision to invest in a large solar and battery facility contrasts with that of xAI, which operates an unauthorized natural gas power plant about 40 miles to the south.

Elon Musk has invested heavily in natural gas to power xAI’s Colossus data centers, despite operating Tesla, which makes grid-scale solar panels and batteries. XAI is operating nearly 60 natural gas turbines without federal clean air permits, according to a Reuters report. Reuters found that pollution from the xAI power plant in Mississippi is affecting predominantly black neighborhoods.

Musk is unlikely to change course. It recently purchased APR Energy, a project developer that specializes in modular natural gas power plants.

Google has also invested in natural gas, working with Crusoe to build a 933-megawatt power plant in West Texas, although that project has been something of an anomaly for the company, which has relied primarily on clean energy to expand its portfolio. Given the speed with which projects like Steel River can be deployed (nearly 2 gigawatts of solar capacity in three years), Google is likely to continue investing in renewables and batteries.