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Solar energy storage in German households: profitability, load changes and flexibility

Kaschub, Thomas; Jochem, Patrick; Fichtner, Wolf

Abstract:
The developments of battery storage technology together with photovoltaic (PV) roof-top systems might lead to far-reaching changes in the electricity demand structures and flexibility of households. The implications are supposed to affect the generation mix of utilities, distribution grid utilization, and electricity price. Using a techno-economic optimization model of a household system, we endogenously dimension PV system and stationary battery storage (SBS). The results of the reference scenario show positive net present values (NPV) for PV systems of approx. 500-1,800 EUR/kWp and NPV for SBS of approx. 150-500 EUR/kWh. Main influences are the demand of the households, self-consumption rates, investment costs, and electricity prices. We integrate electric vehicles (EV) with different charging strategies and find increasing NPV of the PV system and self-consumption of approx. 70%. With further declining system prices for solar energy storage and increasing electricity prices, PV systems and SBS can be profitable in Germany from 2018 on even without a guaranteed feed-in tariff or subsidies. Grid utilization substantially changes by ... mehr


Zugehörige Institution(en) am KIT Deutsch-Französisches Institut für Umweltforschung (DFIU)
Institut für Industriebetriebslehre und Industrielle Produktion (IIP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2016
Sprache Englisch
Identifikator DOI: 10.1016/j.enpol.2016.09.017
ISSN: 0301-4215, 1873-6777
URN: urn:nbn:de:swb:90-595122
KITopen ID: 1000059512
Erschienen in Energy policy
Band 98
Heft SI
Seiten 520-532
Schlagworte Demand flexibility; Optimization model; Tariff design; Electric vehicles; Controlled charging; Battery storage profitability
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