Solar and wind are already the cheapest way to generate new electricity. And this will only continue. Now we're talking about storage and the more that is invested the cheaper it will become.
China recently announced the following; https://www.bloomberg.com/news/articles/2018-12-26/china-approves-its-1st-big-power-storage-pilot-in-renewable-push?srnd=premium-asia
As for Magnis, because we are getting a little off topic, i think it's too far behind with not enough cash/assets to set up and take on the big players.