IRENA Report on Smart Charging By Prasanna Singh/ Updated On Tue, May 21st, 2019 This outlook from the International Renewable Energy Agency (IRENA) shows how policy and technological breakthroughs can advance the development of this key enabling technology for renewables. Through smart charging, EV batteries can help to integrate high shares of solar and wind power into existing grids, as battery storage capacity helps to even out the variability of these sources.