The business electricity market is worried about the introduction of half-hourly charging, specifically how it's going to be done and what the effect will be. Like the domestic smart metering programme, the finer details have appeared a little clouded to some affected parties, but one detail is now clear. Half-hourly charging for business electricity users will not be mandatory until April 2017 after the regulator Ofgem announced a years’ delay to the start date last week.