Quote: “”The IEA’s “Batteries and Secure Energy Transitions” report finds that capital costs for battery storage systems are projected to fall by up to 40 percent by 2030. This significant cost reduction will make combining solar and wind with battery storage more affordable than building new coal or gas power plants in many parts of the world.””
There still seems to be an entrenched group of electrical engineers who refuse to give up the notion that the grid cannot run without the spinning inertia of turbines. The grid can be driven by high power electronics that can simulate the rotating inertia of spinning turbines – it’s called Virtual Machine Mode.
https://www.techspot.com/news/102786-battery-cost-plunge-turbocharge-renewable-energy-shift-iea.html