Later in the article they clarify that the batteries cost $0.187/kWh. However, the owner of said battery will be able to sell energy storage to the grid operato

Later in the article they clarify that the batteries cost $0.187/kWh. However, the owner of said battery will be able to sell energy storage to the grid operator. I also assume that there is a synergy, in that the solar side of the installation is more valuable.