Economic analysis of second use electric vehicle batteries for residential energy storage and load-levelling

The reuse of Li-ion EV batteries for energy storage systems (ESS) in stationary settings is a promising technology to support improved management of demand and supply of electricity. In this paper, MatLAB simulation of a residential energy profile and regulated cost structure is used to analyze the feasibility of and cost savings from repurposing an EV battery unit for peak-shifting. in situ residential energy storage can contribute to the implementation of a smart grid by supporting the reduction of demand during typical peak use periods. Use of an ESS increases household energy use but potentially improves economic effectiveness and reduces greenhouse gas emissions. The research supports the use of financial incentives for Li-ion battery reuse in ESS, including lower energy rates and reduced auxiliary fees. •EV Li-ion batteries can be reused in stationary energy storage systems (ESS).•A single ESS can shift 2 to 3h of electricity used in a house.•While energy use increases, potential economic and environmental effectiveness improve.•ESS supports smart grid objectives.•Incentives like reduced fees are needed to encourage implementation of Li-ion battery ESS.