Ian Brent-Smith tells Janet Wood that security of supply fears are driving business choices on energy, but that electric vehicles will be as important – and batteries will be the key to making them work

Powersun is one of a new breed of companies that offer energy services. It started five years ago developing solar farms, but after the government’s decision to dramatically cut back feed-in tariffs it is now looking at “behind the meter” options on business sites: rooftop PV, voltage optimisation and now storage.