on Xcel Energy
's study (with the Dept of Energy NREL lab) on the potential effect of plug-in hybrids on the electrical grid and emissions.
Xcel Energy announced the results of a six-month study related to plug-in hybrid electric vehicles (PHEVs) and how an increase in their popularity may affect Colorado. The study found that PHEVs may result in a reduction of the overall expense of owning a vehicle and, with the help of smart-grid technologies, eliminate harmful vehicle emissions by up to 50 percent.
NREL’s program was able to simulate adding vehicles to the roads in large increments, under real driving conditions, simulating an increase in the market penetration of these vehicles. The study revealed that these cars, each equipped with a 9 kilowatt-hour battery, could reduce overall CO2 vehicles emissions by half. They could also save owners more than $450 in fuel costs each year compared to a traditional combustion engine vehicle.