Vehicle-To-Grid Possibilities Moves One Step Forward

Testing has been done by the National Renewable Energy Laboratory that brings vehicle to grid one step closer to being a commercial reality.

The U.S. Department of Energy’s National Renewable Energy Laboratory (NREL) has successfully demonstrated vehicle to grid (V2G) capabilities using Ideal Power Converters’ bi-directional Battery Converter.

Ideal Power Converters (IPC) is a developer of disruptive power converter solutions.

V2G will allow vehicles to optimally exchange power with the electricity grid, providing grid-storage benefits in addition to the electric vehicle (EV) transportation benefits of fuel and maintenance savings.

The energy storage benefits of grid-interconnected EVs are expected to be used for local peak demand reduction and grid ancillary services, and will likely be adopted initially for fleet vehicles.

The U.S. Department of Defense has announced plans to adopt EVs in their non-tactical fleets with V2G capabilities.

The NREL and IPC V2G demonstration is considered unique by both parties in that it not only proves technical capability, but also highlights its economic viability.

IPC’s Battery Converter will provide bi-directional power between the EV battery and a 480Vac power grid. The Battery Converter is based on IPC’s patented indirect power converter topology and its Universal Power Converter Platform, which uses a standard highly-efficient, low-cost hardware platform to address multiple markets with only embedded software modifications.

This same hardware platform is already commercially shipping in the company’s 30kW 480Vac photovoltaic (PV) inverter, which NREL is currently installing on a solar parking structure at their Vehicle Testing and Integration Facility.

EV-charger_graphic

The IPC Battery Converter weighs less than 100 pounds, can be wall-mounted inside or outside and will begin shipping in 2013 following industry certifications.

The Battery Converter product will be cost-competitive with conventional EV fast chargers and offer higher charging efficiency (96.5 percent forecast), lower installation costs due to its lightweight design, and V2G capabilities.

With support from the U.S. Department of Energy’s Office of Electricity, NREL successfully integrated and used the new global fast charging standard SAE J1772 combo-connector interface between the Battery Converter and EV, enabling power flow and communications in a single wired connection.

The SAE J1772 combo-connector standard has been endorsed by the majority of global automotive manufacturers and is expected to be available within a year on a variety of electric vehicles.

Lessons learned from NREL’s technology integration demonstration will be applied to a demonstration of V2G-capable electric vehicles integrated with a microgrid at Ft. Carson Army Base in 2013.

“We at NREL are very excited about the progress to date in establishing V2G using industry-standard hardware coupled with IPC’s Battery Converter,” stated Tony Markel, Leader of NREL’s Electric Vehicle Grid Integration efforts. “Development of V2G systems provides opportunity to test theories that V2G will improve the economic viability of electric vehicles by providing low-cost grid storage that will facilitate higher penetration of intermittent renewable energy resources.”

The white paper accessed here produced by IPC gives great insight on how a V2G system


  • Roy_H

    Someday when batteries outlast the life of the car, this may be a good idea. But who now wants to reduce the life of their battery to help the Electrical Power company balance their loads?

  • John K.

    Do ultracaps “wear out” the way rechargeable batteries do?