But, by 2016, Deutsche expects solar energy to reach price parity in all 50 states. For example, the cost of solar-generated electricity in the top 10 states for capacity ranges from 11-15 cents per kilowatt hour (c/kWh), compared to the retail electricity price of 11-37 c/kWh. In those states, there is currently about 6 gigawatts (GW or billion watts) of solar electricity installed.