JPS already has a variety of generating plants, steam (oil-fired), gas turbines, combined cycle, diesel, hydropower and wind.

https://www.jpsco.com/about-jps/how-.../power-plants/

A goal of the government is to have at least 20 renewable energy by 2030. So far JPS has no solar farms, but as Lisa mentioned, many businesses and homes are installing their own. Adoption of solar was hindered by a surcharge (now rescinded) to those using solar but still connected to JPS. You can now sell your excess electricity back to JPS, but at a reduced rate.

JPS made a major press release the other day about dropping their rates by 2%.