On Sun, 25 Aug 2019 15:22:34 -0700 (PDT), wrote:

The costs, pollution, energy consumption in manufacture and vast
demand for lead would be problematic.

More likely to be lithium than lead. But isn't there some other
weird
and wonderful battery technology about using molten sulphur or
something?

Half a gigawatt is a long way from running the grid

True but it might be the half a gigawatt of dispatchable that keeps
the frequency up just enough...

--
Cheers
Dave.