Tesla Powerwall: Analysis of Its Use in Portugal and United States

Rodrigues, Sandy; Faria, Fábio; Ivaki, Ashkan; Cafofo, Nuno; Chen, Xiaoju; Mata‐Lima, Herlander; Morgado‐Dias, Fernando

doi:10.2316/journal.203.2016.1.203-6218

Cited by 17 publications

(9 citation statements)

References 9 publications

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“…It is divided into ten equal yearly amounts. The application of an ESS increases the share of self-consumption saving money on the electricity bills [62]. The price of installations of ESS depends by several parameters.…”

Section: Methodsmentioning

confidence: 99%

Solar Photovoltaic Panels Combined with Energy Storage in a Residential Building: An Economic Analysis

et al. 2018

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Renewable energy is a wide topic in environmental engineering and management science. Photovoltaic (PV) power has had great interest and growth in recent years. The energy produced by the PV system is intermittent and it depends on the weather conditions, presenting lower levels of production than other renewable resources (RESs). The economic feasibility of PV systems is linked typically to the share of self-consumption in a developed market and consequently, energy storage system (ESS) can be a solution to increase this share. This paper proposes an economic feasibility of residential lead-acid ESS combined with PV panels and the assumptions at which these systems become economically viable. The profitability analysis is conducted on the base of the Discounted Cash Flow (DCF) method and the index used is Net Present Value (NPV). The analysis evaluates several scenarios concerning a 3-kW plant located in a residential building in a PV developed market (Italy). It is determined by combinations of the following critical variables: levels of insolation, electricity purchase prices, electricity sales prices, investment costs of PV systems, specific tax deduction of PV systems, size of batteries, investment costs of ESS, lifetime of a battery, increases of self-consumption following the adoption of an ESS, and subsidies of ESS. Results show that the increase of the share of self-consumption is the main critical variable and consequently, the break-even point (BEP) analysis defines the case-studies in which the profitability is verified.

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Section: Methodsmentioning

confidence: 99%

Solar Photovoltaic Panels Combined with Energy Storage in a Residential Building: An Economic Analysis

et al. 2018

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“…To manage the complexity of our evaluation study, we simplified these considerations and assumed that each of the modeled type II homes would own a single default energy storage unit. For this unit, we chose the Powerwall 2, Tesla, Inc.'s current home battery model [31] as recent studies indicate its growing profitability [50,51]. The Powerwall 2 is a lithium-ion battery with 13.5 kWh of usable capacity and a power level of 5 kW that effectively represents the maximum charging and discharging rate.…”

Section: Battery Storage Parametersmentioning

confidence: 99%

One rate does not fit all: An empirical analysis of electricity tariffs for residential microgrids

et al. 2018

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“…In this way, three main revenues are: (i) regional subsidies; (ii) fiscal detraction; and (iii) avoided costs in energy bill. The adoption of storage increases the share of self-consumption (wself,c) and this option saves money on the electricity bills, cutting down also on the PV system payback times [30].…”

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confidence: 99%

The Economic Feasibility of Residential Energy Storage Combined with PV Panels: The Role of Subsidies in Italy

2017

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A solar photovoltaic system produces electricity by converting energy from the sun. By the end of 2016, the global installed solar photovoltaic capacity reached 305 GW. Its growth is impressive in the last years; in fact, it was only equal to 41 GW in 2010. However, Europe has installed only 6.9 GW in 2016 (−1.7 GW in comparison to previous year) and this annual power installed is equal to 9% of global one in according to data released by Solar Power Europe. The profitability of PV systems in mature markets depends on the harmonization between demanded energy and produced one residential energy storage when combined with photovoltaic panels is able to increase the share of self-consumption. This work proposes a mathematical model, in which a Discounted Cash Flow analysis is conducted to evaluate the financial feasibility of photovoltaic-integrated lead acid battery systems in Italy. The indicator used is Net Present Value. Furthermore, a break-even point analysis, in terms of an increase of self-consumption, is conducted. The residential sector is investigated and energy storage system investment is incentivized by fiscal deduction and regional subsidies. The analysis provides several case studies, determined by combinations of the following variables: photovoltaic plant size, battery capacity, the increase of the share of self-consumption, and the useful lifetime of energy storage system. The same case studies are proposed also in four alternative scenarios, where is the modified the structure of subsidies. Results confirm that the profitability can be reached in presence of subsidies.

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Tesla Powerwall: Analysis of Its Use in Portugal and United States

Cited by 17 publications

References 9 publications

Solar Photovoltaic Panels Combined with Energy Storage in a Residential Building: An Economic Analysis

Solar Photovoltaic Panels Combined with Energy Storage in a Residential Building: An Economic Analysis

One rate does not fit all: An empirical analysis of electricity tariffs for residential microgrids

The Economic Feasibility of Residential Energy Storage Combined with PV Panels: The Role of Subsidies in Italy

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