Steven Letendre

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Executive Summary Electric-drive vehicles can become an important resource for the California electric utility system, with consequent air pollution, system reliability, and economic benefits. We refer to electric power resources from vehicles as "Vehicle to Grid" power (V2G). The economic value of some forms of V2G appear high, more than enough to offset(More)
4121 text words plus 4 tables and 8 figures = 7121 total words ABSTRACT Plug-in hybrid electric vehicles (PHEVs) have emerged as a near-term technology to reduce the nation's dependence on imported petroleum, address rising gasoline prices, and reduce carbon emissions from the transportation sector. This paper presents the results of a PHEV grid impact(More)
As module prices have continued to decline (Maycock, 1995), interest in the technical and economic feasibility of using dispatchable photovoltaic (DPV) systems in peak-shaving applications on commercial buildings has grown. Currently, the United States Department of Energy is supporting the development of an integrated DPV peak shaving (DPV-PS) system for(More)
This paper presents a technical and economic analysis of the Union of Concerned Scientists' (UCS) 2.1 kW photovoltaic (PV) array located on the roof of their Cambridge headquarters. We analyze the technology from a variety of different perspectives. The system as it currently exists is primarily an energy supply technology. Alternatively, the system could(More)
The results of an empirical, case-study analysis demonstrate that PV will become cost-effective as a distributed resource long before it becomes a cost-effective, central station, energy supply option. This conclusion is based on the assumption that the non-traditional benefits that distributed PV systems offer to the electrical system and to utility(More)
i Acknowledgments We would like to acknowledge the assistance of David Friedman in helping with a few important aspects of the modeling work upon which this report is based. We also would like to thank useful conversations that helped to guide the analysis herein. Finally, we acknowledge Gage for past collaborations that have been instrumental in helping us(More)
prospect of millions of vehicles plugging into the nation's electric grid in the coming decades never has been better. In 2005, hybrid electric vehicles (HEV) reached 1.2 percent of new cars sold in the United States, more than doubling the number sold in the prior year. Vehicle manufacturers , betting on this trend accelerating in the coming years, are(More)