My dad just installed 200kW on the roof of his factory. The biggest issue is getting the blip* contract with the grid so you could sell the electricity back, an

My dad just installed 200kW on the roof of his factory. The biggest issue is getting the blip* contract with the grid so you could sell the electricity back, and I mean that at any rate. This is by far the biggest hurdle so having an alternative to store energy that makes economic sense will be the biggest wind in the back for a lot of people wanting to do the same.