Batteries: earning money based on price fluctuation

An increasing number of companies have one and even more are considering getting one: a battery. With more and more wind turbines and solar panels putting electricity on the grid, it is becoming progressively more challenging to balance supply and demand at every moment of the day. Batteries can provide a solution, but the business case can be complex and problematic, say Jeroen de Veth, Jim Quik and Mark Rijntalder of Pondera Consult.