The problem is that installation of electric vehicle charging ports at some companies has not kept pace with soaring demand, creating thorny etiquette issues in the workplace. German software company SAP installed 16 electric vehicle charging ports in 2010 at its Palo Alto campus for the handful of employees who owned electric vehicles. Now there are far more electric cars than chargers. Sixty-one of the roughly 1,800 employees on the campus now drive a plug-in vehicle, overwhelming the 16 available chargers. And as demand for chargers exceeds supply, there have been notorious incidents of "charge rage." Companies are finding that they need one charging port for every two of their employees' electric vehicles. "If you don't maintain a 2-to-1 ratio, you are dead," said ChargePoint CEO Pat Romano. "Having two chargers and 20 electric cars is worse than having no chargers and 20 electric cars. If you are going to do this, you have to be willing to continue to scale it."