Solar panels

Shipments of fuel cell technology from the likes of Plug Power PLUG -1.13%, Bloom Energy and myriad other players should reach 1.5 million annually by 2023, according to new projections from Navigant Research.

Right now, the main driver is installations for industrial and commercial buildings, where fuel cells are gaining credibility as a power back-up alternative during outages or to complement demand response strategies (in which business reduce their load on the electric grid for a break in pricing). . .

http://www.forbes.com/sites/heatherclancy/2014/10/20/energy-storage-fuels-pick-up-in-fuel-cell-sales/?ss=energy