The 100-megawatt utility-scale solar project just announced by Erthos is not even close to the largest solar project currently being developed in the U.S., but it will be the only large solar farm with panels installed directly on the ground, without elevated steel racking or trackers.

Erthos signed an agreement with project developer Industrial Sun for the utility-scale solar project in Texas. It’s unlike any other big solar project ever deployed, using an approach that has the potential to take a bite out of the rising costs of solar installations, according to Erthos’ founders and funders. 

Canary Media covered Erthos when it unstealthed in June 2021 and when it raised $17.5 million in March of this year. The company’s system is unique, as we reported: 

It’s a radical innovation that challenges a basic architectural tenet of utility-scale solar — and the $3 billion business of trackers and racking. By eliminating what it sees as ​“a tremendous amount of unnecessary materials and risks,” Erthos claims it can build a solar power plant in half the time on one-third of the land, all while using 70 percent less cable and trenching. 

Erthos contends that its design requires ​“only light civil engineering,” with a system that can be used in different topographies with little need to grade, making it simpler to install than other systems. 

Industrial Sun said that land constraints would have prevented the new project’s site from being developed with conventional solar technologies, which typically require five to 10 acres of land per megawatt of capacity. Erthos claims that its mounting scheme requires less than 2.5 acres per megawatt.