Back in 2016, First Solar proved that utility-scale solar farms can provide critical transmission grid services in a California pilot project. Four years later, the leading U.S.-based solar module maker has taken the next big step in turning this capability into a real-world grid resource: getting a grid operator to pay for it. Chilean grid operator Coordinador Eléctrico Nacional has added First Solar’s 141-megawatt Luz del Norte PV power plant to its list of generators approved to provide grid services.