Electricity is basically a worldwide utility that is easily accessible to consumers. But when it comes to the energy industry as a whole, conditions turn into strict regulation, a monopoly, or even complete chaos. Electricity production itself is only half the battle using existing networks, matching supply and demand and reducing greenhouse gas emissions from their production is a difficult task.
In developed countries it is hard to sell but given the fact that 2/3 of the world's population do not have access to this technology I think there are many places in the world where it can be sold )