Buoyed by strong growth in the market for plug-in electric vehicles, worldwide sales of EV charging equipment will grow from around 442,000 units in 2013 to 4.3 million in 2022, representing a compound annual growth rate of 28.8 percent, according to a study by Navigant Research.Revenue from the sales of car charging equipment is expected to grow from $567 million in 2013 to $5.8 billion in 2022 at a CAGR of 29.4 percent, according to the report, Electric Vehicle Charging Equipment.