Petrol from air?

A small British company has produced the first “petrol from air” using a revolutionary technology that promises to solve the energy crisis as well as helping to curb global warming by removing carbon dioxide from the atmosphere.

I can’t be the only one who wants to see the numbers before getting too excited. How much energy goes in and how much is produced? Depending upon efficiency etc. it could be a good way of storing energy generated by solar or wind when it’s not immediately needed by the grid.