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Investigation of the Viability of a Small Scale SPV System for Residential Applications with a Novel Sizing Method
Högskolan Dalarna, Akademin Industri och samhälle, Energi och miljöteknik.
2009 (Engelska)Självständigt arbete på avancerad nivå (masterexamen)Studentuppsats (Examensarbete)
Abstract [en]

Security photovoltaic systems or SPV systems represent a slowly growing segment of the photovoltaic market that has unrealized potential. A SPV system is a grid tied PV system with a battery bank, switchbox, and charge controller that allows the system to deliver uninterrupted power to the user in the event of a power outage. This paper uses a newly developed sizing method to investigate the viability of a small scale residential SPV system in Southern California. This novel sizing method was developed for this paper and is based on the idea of under sizing the battery bank by taking into account radiation incident on the PV array during an outage. The under sizing is done using an iterative process to maximize a financial indicator called the Life Cycle Analysis value. A theoretical SPV system is then sized using the aforementioned method and then modelled using NREL's HOMER software and Microsoft Excel. The result of this sizing is a 2.5 kWp PV array with a 2 kW inverter and a 1 kWh battery bank. The required initial investment is $11,450. The payback period was 24.8 years and the IRR was ~0%. The system could deliver 30% of the maximum daily load for a minimum period of 60 minutes and a maximum period of 70 minutes. The economics of the system reveals that to be cost effective, large avoided outage benefits are necessary. This implies that SPV systems are more viable for commercial applications than for residential applications, as commercial applications typically have larger avoided outage benefits.

Ort, förlag, år, upplaga, sidor
Borlänge, 2009. , s. 48
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URN: urn:nbn:se:du-4126OAI: oai:dalea.du.se:4126DiVA, id: diva2:518696
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teknik
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Tillgänglig från: 2009-08-11 Skapad: 2009-08-11 Senast uppdaterad: 2012-06-19Bibliografiskt granskad

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